Bio-data of Prof. R. N. Iyengar


Raja Ramanna Fellow at IISc, Bangalore. Tel:080-22932818(o); Fax:080-23600404;



Retired in July 2005 as K.S.I.D.C Chair Professor, Department of Civil Engineering

Also at Center for Atmospheric & Oceanic Sciences,

Indian Institute of Science, Bangalore 560012.


Formerly Director  (April 1994 - April 2000)

Central Building Research Institute, CSIR, Roorkee - 247 667



Date of Birth                                          2nd June 1943


Fields of Research                                            Disaster Mitigation, Structural Dynamics, Random                                    

                                                                        Vibration, Nonlinear Systems.

                                                                        Earthquake Engineering, Railway Track-dynamics

                                                                        Rainfall Modelling, History of Science


Educational                                                    B.E. (Civil)            MysoreUniversity, 1962

                                                                       M.Sc. (Engg.)Indian Institute of Science, 1966

                                                                       Thesis : ‘Vibration of Beam and Slab Bridges'.


                                                                       Ph.D. Indian Institute of Science, 1970 

                                                                       Thesis : 'Nonstationary Random Process Model 

                                                                                       for Earthquakes’ 


Honours and Distinctions


*Fellow, Indian Academy of Sciences, Bangalore.

*Fellow, Indian National Academy of Engineering, New Delhi.

*Fellow, National Academy of Sciences, Allahabad.

*Member, Asia-Pacific Academy of Materials.

*Member, European Academy of Sciences, Brussels


Alexander Von Humboldt Fellowship (Senior), Germany 1978 to 80, 1992, 1997


First Prize of the Railway Board for the paper 'Identification of Damping in Railway Vehicles under Running Condition’ 1989-90.


National Representative, General Assembly of IUTAM 1987-92


Plenary Speaker GAMM Conference, on Applied Mechanics, Leipzig, Germany, 1992


Distinguished Schmidt Visiting Chair, Florida Atlantic University, Boca Raton, U.S.A. 1995,


Shelter Award by the Shelter Promotion Council of India, Calcutta, 1996


Sir M. Visvesvaraya Award for Senior Scientists for life time Contribution to Science and Technology ; Govt. of Karnataka, 1996.


Narayanan Memorial lecture Award, Acoustical Society India, 1996.


18th ISET Annual Lecture Indian Society of Earthquake Technology, 1997


A.K. Sen Memorial Lecture Award, IIT, Kharagpur, 1998.


Chairman and Organizer IUTAM Symposium on ‘Nonlinearity and Stochastic Structural Dynamics’, 4-8 January 1999,  IIT  Madras.


Invited Sectional Lecture, ICTAM, Chicago, USA. August 2000,


Swamy Rao Memorial Lecture Award, JNTU, Kakinada, 2001.


NRDC-Technology Day Award for ‘Pollution Control Device for Brick Kilns’ (Shared), 2001


Member, Editorial Board, J. of Probabilistic Engineering Mechanics, Eisevier Applied Sciences, U.K.(1994-2004)

Member, Editorial Board, Sadhana, Indian Academy of Sciences, Bangalore.

Member, Editorial Board, J. of Indian Soc. of Earthquake Technology.

Associate Editor, J. of Indian Institute of Science, Bangalore (1987-92).



Membership of Professional Societies


Fellow, Institution of Engineers (India)

Life Member, Indian Science Congress

Life Member, Indian Society of Earthquake Technology.

Life Member, Indian Nuclear Society, Mumbai.

Life Member, Indian Geotechnical Society.


Professional Record

Raja Ramanna Fellow, Indian Institute of Science, August 2005-Continuing.

Visiting Professor, VIT (Deemed University), Vellore

Professor, Indian Institute of Science, Bangalore, 1986-2005

Director, Central Building Research Institute, (CSIR) Roorkee, 1994-2000

Associate Professor, Indian Institute of Science, 1981-1986.

Assistant Professor, Indian Institute of Science, 1974-1981.

Lecturer, Indian Institute of Science, 1969-1974.

Visiting Assistant Professor, Dept. of Aeronautics and Engineering Sciences, Purdue University, W. Lafayette, USA, 1970–1971.

Visiting Scholar, Dept. of Electrical Engineering, Brooklyn Polytechnic, New York, USA, Feb-March 1971.

Research Associate, Dept. of Civil Engineering, Columbia University, New York, USA, April-July 1971.

Senior Alexander Von Humboldt Fellow: Univ. of Hannover, Germany, Oct 1978-Dec1979, May-July 1980 and April-June1992, Reinvited: 1997 and 2000.



Research Publications


A. Structural Dynamics, Random Vibration, Earthquake Engineering ( Refereed Journals)


1. R.N. Iyengar (1964), Analysis of Arcades, J.  Inst. of Engrs (India), XIIV, 11, 722-730.

2. R.N. Iyengar (1965), On the Application of the Reciprocal Theorem to the Vibration of   Continuous Beams.  Bull.  Indian Society of Earthquake Technology, 17 53-60.

3. K.T.S. Iyengar and R.N.I. (1967), Free Vibration of Beam and Slab Bridges, Publns, IABSE, 1- 14.

4. K.T.S. Iyengar & R.N.I (1967), Orthotropic Plate Parameters of Stiffened Plates and Grillages in Free Vibration, Appl.  Scientific Research 1 7,  422-438.

5. K.T.S. Iyengar, K.S. Jagadish and R.N.I (1967), Vibration of Beam and Slab Bridges, Proc. Inst. of Engrs. (India), IXVIII, 1, 141-169.

6. R.N.I & K.T.S. Iyengar (1969), A Nonstationary Random Process Model for Earthquake Accelerograms, Bull. Seismological Society of America. 59.3,  1163-1188.

7. R.N.I and K.T.S. Iyengar (1970), Probabilistic Response Analysis to Earthquake J.Engg. Mechanics, (ASCE), 96, EM3,  207-225.

8. R.N.I & M. Shinozuka (1972), Effect of self Weight and Vertical Acceleration on Tall Structures during Earthquakes, Intnl. J. of Earthquake Engineering and Structural Dynamics, 1, 1,  69-72.

9. R.N.I (1972), Worst Inputs and a Bound on the Highest Peak Statistics of a class of Nonlinear System’, J. of Sound and Vibration, 25, 1, 29-37.

10. R.N.I (1973), First Passage Probability during Random vibration, J. of Sound and Vibration, 31, 2, 185-193.

11. Ramaprasad & R.N.I (1975), Free Vibration of a Reservoir-Foundation System,

J. of Sound and Vibration, 39, 2, 21 7-227.

12. R.N.I (1975), 'Random Vibration of a Second Order Nonlinear Elastic System’, J. of Sound and Vibration, 40, 2, 155-165.

13. R.N.I & K.B. Athreya (1975), ‘A Diffusion Process Approach to a Random Eigen Value Problem’, J. of Indian Institute of Science, 57, 5, 185-191.

14. R.N.I & P.N. Rao (1975), ‘Free Vibration of Elastic Medium', Bull.  Indian Society of Earthquake Technology, 12, 147-154.

15. R.N.I & P.K. Dash (1976), ‘Random Vibration Analysis of Stochastic Time varying Systems’, J. of Sound and Vibration, 45, 1, 69-89.

16. R.N.I & P.K. Dash (1977), ‘Highest Peak Distribution In Time-varying Systems’, J. of Engg.  Mech. Div. (ASCE), 103, EM5, 869-898.

17. R.N.I & K.J. Iyengar (1978), ‘ Stochastic Analysis of Yielding System',  J.of Engg.  Mech.Div. (ASCE), 104, EM2, 383-398.

18. R.N.I & P.K. Dash (1978), ‘Study of Random Vibration of Non-linear Systems by the Gaussian Closure Technique’, J. of Applied Mech. (ASME), 45, 393-398.

19. R.N.I & P.K. Dash (1978), 'Random Vibration In Spacecraft Structures: A review', J. of Aeronautical Society of India, 30, 1,2, 1-21.

20. R.N.I & P.N. Rao (1979), ‘Generation of Spectrum Compatible Accelerograms', lntnl. J. of Earthquake Engg. and Structural Dynamics, 7, 253-263.

21. R.N.I (1979), 'Inelastic Response of Beams under Sinusoidal ad random Loads', J. of Sound and Vibration, 64, 2,  161-1 72.

22. R.N.I & O. Mahrenholtz (1982), ‘Nonlinear Oscillation of a Vortex Excited Cylinder in Wind’, Solid Mechanics Archives, 7,  411-432.

23. P.K. Dash and R.N. Iyengar (1982), ‘Analysis of Randomly Time Varying Systems by Gaussian Closure Technique', Journal of Sound and vibration, 83, 2,  241 -151.

24. R.N.I & K.C. Prodhan(1983), ‘Classification and Rating of Strong-Motion Records', Journal of Earthquake Engineering and Structural Dynamics, 11,  415-426.

25. R.N.I. (1984), 'Estimation of Yield Damage in Plates and Shells during Random Vibration',  J. Aero. Soc. of India, 36, 2.

26. R.N.I. & K. Meera (1984), ‘Earthquake in South India on 20th March,1984’. Bull.  Ind. Soc. of Earthquake Technology, 21, 2,  49-61.

27. R.N.I. & M.R. Pranesh (1985), ‘Dynamic Response of a Beam on a Foundation of Finite Depth', Indian Geotechnical Journal, 1 5, 53-63.

28. R.N.I. (1986), 'A Nonlinear System under Combined Random and Periodic Excitation’. J. of Statistical Physics, 44, 5 1 6,  907-920.

29. R.N.I., N. Anantanarayana and D. Deepak (1986), 'Track Classification and Track Index',  Rail International,  39-44.

30. R.N.I. and C.S. Manohar (1987),’Nonstationary Random Critical Seismic Excitation', J. of Engg.  Mech., 113, 4,  529-541.

31. R.N.I. & K.C. Prodhan (1987), 'Internal Consistency of Smooth Design Response Spectra',  Bull.  ISET, 24, 161-173.

32. R.N. Iyengar (1988), 'Higher order Linearization in Nonlinear Random Vibration', Intnl. J.  of Nonlinear Mech. 23, 5, 385-391.  

33. R.N. Iyengar (1988), ‘Stochastic Response and Stability of the Duffing Oscillator under Narrow band Excitation', J. of Sound and Vibration, 120,2, 255-263.

34. R.N. Iyengar and G.V. Rao (1988), ‘Free Vibration and Parametric Instability of a Laterally Loaded Cable’,  J. of Sound and Vibration, 127,2,  231-243.

35. R.N. Iyengar, K.R. Reddy and C.S. Manohar (1989), ‘Chaotic Response of Some simple Nonlinear Oscillators', J. Aero.  Soc. of India, 41, 1, 1-6.

36. R.N. Iyengar and C.S. Manohar (1989), ‘Probability Distribution of the Eigen-values of the Random String Equation’, J.  of Applied Mechanics, 56,  202-207.

37. R.N. Iyengar (1989), 'Response of Nonlinear System Systems under Narrow Band Excitation'. J. of Structural Safety, 6, 177-188.

38. G.V. Rao & R.N. Iyengar (1990), ‘Nonlinear Planar Response of a Cable under Random Excitation’, J.of Probabilistic Engineering Mechanics, 5,4, 182-191.

39. R.N. Iyengar & C.S. Manohar (1991), ‘Narrowband Random Excitation of a Limit Cycle System', Archive of Applied Mech., 61,133-141,

40. R.N. Iyengar & G.V. Rao (1991), ‘Internal Resonance and Nonlinear Response of a Cable under Harmonic Excitation’, J.of Sound and Vibration. 149, 1, 25-41

41. R.N. Iyengar (1991), 'Stochastic Characterization of Chaos in a Nonlinear System',

Physics Letters-A, 154, 7-8, 357-360.

42. G.V. Rao & R.N. Iyengar (1991), ‘Seismic Response of a Long Cable', Int. J. Earthquake Engineering and Structural Dynamics, 20, 243-258.

43. C.S. Manohar & R.N. Iyengar (1991), 'Entrainment in Vander Pol's Oscillator In the presence of Noise', Int. J. of Nonlinear Mech., 26, 5,  679-686.

44. R.N. I.& C.S. Manohar (1991), 'Rocking Response of Rectangular Rigid Blocks under Random Noise Base Excitation’, Invited paper, Special Issue. Int. J. of Nonlin Mech., 26, 6.

45. R.N. Iyengar & O.R. Jaiswal (1993), ‘Dynamic Response of a Beam on Elastic Foundation of Finite Depth under a Moving Force', Acta Mechanica, 96, 67-83.

46. R.N. Iyengar & O.R. Jaiswal (1993), ‘A New Model for Non-Gaussian Random Excitation', J. of Probabilistic Engg.Mechanics, 8, 280-287.

47. C.S. Manohar & R.N. Iyengar (1993), 'Probability Distribution of the Eigen values of Systems governed by the Stochastic Wave Equation', J. Probabilistic Engg.Mech.8, 57-64.

48. R.N.I. (1993), 'Chaotic Behaviour in Non-linear oscillators',  ZAMM,73, 4-5 T46-T53.

49. R.N.Iyengar & O.R. Jaiswal (1994), ‘Random Process Modelling of Railway Track Unevenness',  Indian Railway Technical Bulletin.

50. C.S. Manohar & R.N. Iyengar (1993), ‘Free Vibration Analysis of Stochastic Strings', J. of Sound and Vibration.

51. R.N. Iyengar & D. Roy (1994), ‘Nonlinear Dynamics of a Rigid Block on a Rigid Base',

 J. of Applied Mechanics, 63, pp 55-61.

52. R.N. Iyengar, C.S. Manohar & O.R. J. Jaiswal (1994), 'Field Investigation of the 30th Sept.1993 Earthquake in Maharashtra', Current Science, .67, 5,

53. R.N. Iyengar & O.R. Jaiswal (1995), 'Random Field Modelling of Railway Track Irregularities', J. Transport Engg., ASCE, 121, 4, 303-308.

54. R.N. Iyengar & D. Roy ( 1996), ‘Conditional Linearization In Random Vibration', J. Engg.  Mech, ASCE. 122, 31,197-200.

55. R.N.Iyengar (1997) ‘Strong motion: Analysis, Modelling and Applications’ Bull. ISET, Paper no. 370, 34, 4, 171-208

56. R.N. Iyengar & D. Roy (1998)  ‘ New Approaches  for the Study of Non linear Oscillators’

 J. of Sound and Vibration, 211,5, 843-875.

57. R.N. Iyengar and D. Roy (1998), ’Extension of the Phase Space Linerization Technique for Nonlinear Oscillators’ J. of Sound and Vibration, 211,5, 877-906.

58. R.N. Iyengar and S.K. Agarwal (1999) ‘Statistical Analysis of ensemble of strong motion records’, Current Science, 76, 5,  684-687.

59. R.N.Iyengar (2000) ‘Seismic Status of Delhi Megacity’ Current Science.78, 568-574.

60.R.N.Iyengar and S.K. Agrawal (2001) Earthquake Source Model using Strong                                                                                                           Motion Displacement as Response of Finite Elastic Media,  Proc. Indian Acad. Sci., J. Earth and Planetary Sciences.110,1, 9-23.

61. R.N.Iyengar and S.T.G.Raghukanth (2002) Strong ground motion at Bhuj City during the Kutch Earthquake, Current Science, 82, 11, 1366-72.

62.R.N.Iyengar and S.T.G.Raghukanth (2004) Attenuation of strong ground motion in Peninsular India, Seismological Research Letters, 75, 4, 530-540.

63. RNI and S.Ghosh, (2004), Microzonation of earthquake hazard in Greater Delhi area, Current Science, 87,9, 1193-1202.

64. RNI and S.T.G.Raghukanth (2006) Strong ground motion estimation during the Kutch, India earthquake, Pure and Applied Geophysics 163, pp 153-173.

65. RNI and B.Basak (2005) Investigation of a Nonlinear System Under Partially Prescribed Random Excitation,  Int. J of Nonlinear Mechanics, 40, pp 1102-1111.

66. RNI and S.T.G.Raghukanth (2005) Attenuation of Seismic Spectral Acceleration in Peninsular India, under review, J. of Earthsystem Sciences

67. RNI and S.T.G.Raghukanth (2005) Estimation Seismic Hazard for Mumbai City, Accepted for Publication in Current Science.

68. RNI and B.P.Radhakrishna (2005) Evolution of the western Coastline of India and the Probable Location of Dwaraka of Krishna: Geological Perspectives, J of Geological Soc. of India, 66, Sept. pp 285-292.


B.Atmospheric Sciences (Refereed Journals)

1. S.Gadgil and R.N. Iyengar (1980), ‘Cluster Analysts of Rainfall Stations of the Indian Peninsula', Quarterly J. Royal Meteorological Society, 106, 450, pp 873-886.

2. R.N. Iyengar (1982), 'Stochastic Modelling of Monthly Rainfall’, Journal of Hydrology, 57, pp 375-387.

3. R.N. Iyengar (1987), 'Analysis of Weekly Rainfall Time Series', Mausam. 38,4,453-458.

4. R.N. Iyengar (1991), 'Variability of Rainfall through Principal component Analysis',

J.of  Earth and Planetary Sciences, Proc. of Indian Acd. of Sciences, 100,2, 105-126.

5. R.N. Iyengar & P. Basak (1994), ‘Regionalization of Indian Monsoon Rainfall and Long-term Variability Signals’, Intnl. J.of Climatology, 1 4, 1095-1114.

6. R.N.Iyengar and S.T.G.Raghukanth (2003) ‘Empirical Modelling and Forecasting of Indian Monsoon Rainfall’ Current Science, 85,8, 1189-1201.

7. R.N.Iyengar and S.T.G.Raghukanth (2004) Intrinsic mode functions and a strategy for forecasting Indian monsoon rainfall. J of Met. and  Atmos. Physics. July-Online.

8. RNI (2004) Description of rainfall variability in Brihat-samhita of Varaha-mihira, Current Science, 87, 4, 531-533. 

9. R.N.Iyengar and S.T.G.Raghukanth (2006) Forecasting of Seasonal Monsoon Rainfall at Subdivision Level.  Current Science,  10th August. pp. 350-356.


C.History of Science (in Refereed Journals)

1. R.N. Iyengar & D. Sharma (1996) Some Earthquakes of Kashmir from Historical Sources Current Science, 71,4, 330-331.

2. R.N. Iyengar (1999), Earthquakes in Ancient India, Current Science, 77, 6, 827-829.

3. R.N.Iyengar, D.Sharma and J.M.Siddiqui (1999) Earthquake History of India in Medieval     Times, Ind. J. Hist. of Science, 34 (3),181-237.

4. R.N.Iyengar and D.Sharma (1999) Some Earthquakes of the Himalayan Region from Historical Sources, J Himalayan geology, 20,1,81-85.

5. R.N.Iyengar (2003) Internal Consistency of Eclipses and Planetary Positions in Mahabharata, Ind. J.of. Hist. Science, 38, 2, 77-115.

6. RNI (2003) Historicity of Celestial Observations of Mahabharata, Q. J of Mythic Society, XCIV, 1-2, 150-186.

7. R.N.Iyengar (2004) Profile of a Natural Disaster in Ancient Sanskrit Literature, Ind. J. Hist. of Science, 39,1, 11-49.

8. RNI (2004) Extra Terrestrial Impacts, J. of Geological Soc. of India, (Correspondence) 64, 6, 826-827.

9. RNI (2005) Eclipse period number 3339 in Rigveda, Ind. J. Hist. of Science, 40, 2, June,                                      pp.139-152.

10. RNI (2006) Some Comet observations of ancient India, J.Geological Soc. Ind. 67, March, pp289-294.

11. RNI (2006) Celestial observations associated with Krishna-lore, Ind. J. Hist. of Science, 41.1, pp1-13.


D.General Articles (Some in Refereed Journals)

1. R.N. Iyengar (1993), 'How Safe is Tehri Dam to Earthquakes', Current Science, Vol.65. No.5,  383-392.

2. R.N. Iyengar (1994), 'Dynamic Analysis and Seismic Specification of Tehri Dam' Earthquake Hazard & Large Dams in the Himalaya, INTACH, Bharatiyam, Nizamudiin, New Delhi, pp 137-152.

3. R.N. Iyengar (1994), 'Armenia : A Travelogue’, Current Science, Vol.67, No.3, pp 157-161.

4. R.N. Iyengar (1994), 'History of Earthquakes in South India', The Hindu, January 23, 1994.

5. R.N. Iyengar (1994), 'Earthquake Experimentation using Railway Track', The Hindu, September 28, 1994.

6. R.N. Iyengar (1996), ’Fire Engineering: Research and Development at Central Building Research Institute', IBC News (Special Issue), Vol. 3, No. 2, April-June, 1996.

7. R.N. Iyengar (1996), ’Rural Housing: A Discussion’, Kurukshetra (Special Issue), Vol.  XLIV, Nos. 8, 9, May-June, 1996.

8. R.N. Iyengar (1997), ‘Natural Disaster Mitigation Research at CBRI’, Journal of Indian Building Congress, 3rd Annual Convention and Seminar on Built Environment and Natural Hazards, Feb. 7-8,1997.

9. R.N.Iyengar (2001) ‘Is the seismic zonation map of India correct?’ The Hindu, 17th April.


E.Publications in Proceedings of Seminars and Symposia

1. A.J. Schiff, R.N. Iyengar, J.R. Duan & J.L. Bogdanoff (1970), 'On the Behaviour of Walls under Seismic disturbances’, Proc. Conf. on Earthquakes and Structures, Jassy, Rumania.

2. R.N. Iyengar & K.T.S. Iyengar (1973), ’Stochastic Process Modelling of Earthquake and Probabilistic Response Analysis’, Proc.  Symposium o Earth and Earth Structures subjected to Earthquakes, Roorkee, India, Vol. 1, pp 223-231.

3.R.N. Iyengar, K.T.S. Iyengar, V. Ramachandran & Ramaswamy (1974), 'Seismic Analysis of the Ventilation Stack for the Madras Atomic Power Plant’, Proc.  5th Symposium on Earthquake Engineering, Roorkee, pp 39-46.

4.R.N. Iyengar & K.S. Jagadish (1974), ‘Probability of Failure of Structures under Earthquake Excitations', Proc.  5th symposium on Earthquake Engineering, Roorkee, pp 253-258.

5.R.N. Iyengar & P.N. Rao (1975), ‘Dynamic Amplification In Two Dimensional Soil Media', Proc.  5th Asian Regional Conference on soil Mechanics and Foundation Engg, Bangalore, pp 279-282.

6. R.N. Iyengar, D.V. Reddy & S. Vedula (1976), ‘A Random Process Model for Monthly River Flows', Proc.  Symposium on Mathematical Modelling of Water Resources Problems, Patna, India.

7.R.N. Iyengar, A.S. Reddy (1977), ‘Response of a Soil-pile System during Earthquakes’, Proc. Intnl. Symp. on soil Structure Interaction, Roorkee, pp 355- 360.

8.R.N. Iyengar & T.K. Saha (1977), ’Effect of Vertical Ground Motion on the Response of Cantilever Structures’, Proc.6th WCEE, New Delhi, pp 3-193-198.

9.R.N. Iyengar & K.C. Prodhan (1982), ’Equivalent single Degree Systems and Approximate Seismic Response’, Proc.  VII Symp. on Earthquake Engineering, Roorkee, Vol. I

10.R.N. Iyengar & C.S. Manohar (1984), ‘Extreme Seismic Excitation, Proc.  Symp. on Earthquake Effects on Plant and Equipment, Hyderabad, pp 65-69.

11.R.N. Iyengar & K.C. Prodhan (1984), 'Engineering Classiflcation of Earthquake Records', Proc.  Symp. on Earthquake Effect on Plant and Equipment, Hyderabad, pp 71-75.

12.R.N. Iyengar & K. Meera (1984), ‘Overturning of Rigid Bodies during Earthquakes', Proc.  Symp. on Earthquake Effects on Plant ad Equipment, Hyderabad, pp 129-133.

13.R.N. Iyengar (1984), ‘Stochastic Process Modelling of Rainfall’, Proc.Colloquium on Precipitation Analysis and Flood Forecasting, Ind. Inst. of Tropical Meteorology, Pune.

14.R.N. Iyengar (1984), 'The Vortex Oscillator as a Non-conservative System', Proc.  Euromech Colloquium 190, University of Hamburg - Harburg, pp 36-38.

15.R.N. Iyengar & C.S. Manohar (1985), ‘System Dependent Critical Stochastic Seismic Excitation'.  Transactions of the 8th Int. Conf. on Structural Mechanics in Reactor Technology, SMIRT, Brussels, M 15/6, pp 147-1 51.

16.R.N. Iyengar (1985), 'Some Studies in Random Vibration', First Indo-Soviet symposium on Mechanics', Tashkent, USSR.

17.R.N. Iyengar, V. Ramachandran and U.S.P. Verma (1987) 'Uplift of a Power Plant Founded on rock under Seismic Excitation', Trans. of the 9th Intnl.Conf. on SMIRT, Lausanne.

18.R.N. Iyengar, A. Krishnan and K.S. Dixit (1987), 'Dynamic Analysis of Coolant Channel Assembly under Seismic Excitation, 9th Intnl. Conf.  SMIRT, Lausanne.

19.R.N. Iyengar & C.S. Manohar (1987), ‘Vander Pol's Oscillator under Combined Periodic and Random Excitation’, IUTAM Symposium, Austria.

20.R.N. Iyengar, J. .S. Goray & H.S. Khushwaha (1989), 'Development of Floor Response spectra using PSD Function’, Trans. 10th Intl. Conf. on SMIRT, Vol. k2, pp 545-550.

21.C.S.Manohar & R.N. Iyengar (1990), ‘Natural Frequencies of Simple Stochastic Structural systems', Proc.  Intl.  Conf.  Str.  Testing, Analysis and Design, ICSTAD, Bangalore, India.

22.R.N. Iyengar (1991), 'Approximate Analysis of Nonlinear System under narrow band Random Inputs', Proc.  IUTAM Symp. on Nonlinear Stochastic Dynamics, Turin, Italy, (Ed. N. Bellomo), Springer Verlag, pp 309-319.

23.R.N. Iyengar (1993), 'Residence Time characteristics of Strong Motion Accelerograms', Proc. Int. conf. on Continental Collision Zone Earthquakes, Yerevan, Armenia, 1-7 Oct.

24.R.N.I. C.S. Manohar & O.R. Jaiswal (1994), 'Field Study of the Maharashtra Earthquake of 30th September 1993’, Proc.10th Symp on Earthq. Eng., Roorkee, 16-18 November.

25 .R.N. Iyengar (1994), 'Strong Motion Data and Parameters', Proc.10th Symposium on Earthquake Engineering, Roorkee,

26. R.N.Iyengar and K.Popp(1994) ‘Random Vibration of a Galloping Oscillator in Wind’ Proc. ICOSSAR-93,  1711-14, Balkema, Rotterdam.

27. RNI and O.R.Jaiswal (1995) Stochastic Response of Irregular Tracks under Moving Vehicles., Proc.IUTAM Symp.on Nonlinear Stoch. Mechanics, Trondheim, Norway. 213-224., Kluwer Acd.Publ.

28. R.N. Iyengar (1996), ‘Seismic Specification through Spectrum Compatible PSD Functions’, Proc. Symposium on Earthquake Effects on Structures, Plant & Machinery, BHEL, New Delhi.


29.R.N. Iyengar and S. Sarkar (1997), ‘A Statistical Approach to Study of Landslides',

Proc. CBRI Golden Jubilee Year Conf., New Delhi, Tata-McGraw-Hill Co.  63-71.

30. R.N. Iyengar, M.P.Jaisingh, (1997), ‘Lateral Strength Masonry Walls’, Proc.CBRI Golden Jubilee Year Conf., New Delhi, Tata-McGraw-Hill Co.  131-142.

31. R.N.Iyengar (1999) ’Seismic Microzonation: A Strategy for Planning Built Environment’ Proc. TCDC Workshop on Natural Disaster Reduction:,Policy Issues and Strategies, Dec.1999, SERC, Madras, III 9-III 18.

32. R.N.Iyengar (1999) ‘Application of Random Vibration in Earthquake Engineering,’ Keynote Address, Proc. of 4th International Conference on Vibration Problems, (ICOVP) Jadhavpur Univ, Calcutta, Vol A, 1-23.

33. R.N.Iyengar (2000) ‘Probabilistic Approaches in Earthquake Engineering’ Invited Lecture, Proc. ICTAM 2000,  (Ed. Aref and Philips).457-471. Kluwer Acad.Publ. Netherlands.

34. R.N.Iyengar (2000), ‘Performance of Indian Rural Stone Masonry during Earthquakes’ Proc. 6th Intnl. Sem. On Strucutural Masonry for Developing Countries, October 2000, Bangalore, Allied Publ. Ltd.,  247-252.

35. R.N.Iyengar (2000), ‘Vibration Problems in Building Structures’ Invited Talk, Proc. VETOMAC-I, October 2000, Bangalore.

36. RNI and S.K.Agarwal (2000) Source Location - an Inverse Structural dynamic Problem, Proc. II Structural Engg.Convention, (SEC-2000), IIT-Bombay, 401-408, Quest Publ. Mumbai.

37. RNI (2001), ‘ Earthquakes in India an Engineering Perspective’ National Sem. on “Design and Construction of Earthquake Resistant Structures” May, 2001,INSTRUCT,  A1-A18.

38. RNI (2001) ‘Seismic Microzonation of Vulnerable Cities’ National Sem. on “Design and Construction of Earthquake Resistant Structures” May, 2001,INSTRUCT, Bangalore , B1-B14

39.RNI (2001) ‘Selection of Ground Motion Parameters at Project Sites’ Proc. Workshop on Safety of Nuclear Power Plant Structures, SNPP-2001, July 2001, IISc., Bangalore, 35-52.

40. R.N.Iyengar (2002) Engineering Approaches in Seismic Hazard Estimation, Proc. Advances in Civil Engg., ACE-2002, IIT Kharagpur, pp770-780., Allied Publ. Ltd., N.Delhi.

41. R.N.Iyengar and S.T.G.Raghukanth  Earthquake Source Model and Estimation of Strong Ground Motion, Proc. Int. Conf. on Construction Management and Materials in Civil Engineering, CONMAT-2003, IIT Kharagpur. 127-140. Phoenix Publ. House. N.Delhi.

42. R.N.Iyengar and S.T.G.Raghukanth (2003) Attenuation of Strong Ground Motion and Site Specific Seismicity in Peninsular India, Proc. National Seminar on Seismic design of Nuclear Power Plants, 269-291, SERC, Madras.

43.R.N.Iyengar and S.Ghosh (2003) Seismic Hazard Microzonation of Delhi City, Proc. National Sem. on Disaster Management and Mitigation, INAE, 93-108. Phoenix Publ. N.Delhi.

44. RNI and S.Ghosh (2004)  Proc. 13th WCEE, Vancouver, Canada.

45. RNI and S.T.G.Raghukanth (2004) Earthquake source geometry compatible with strong motion data, Proc. 13th WCEE, Vancouver, Canada.

(To be updated)



1. R.N Iyengar, Editor, Natural Hazards in the Urban Habitat , Proc. of CBRI Golden Jubilee Conf. N.Delhi,1997, Tata McGraw-Hill Publ. Co. Ltd. N.Delhi.

2. S.Narayanan and R.N.Iyengar, Editors. IUTAM Symposium on Nonlinearity and Stochastic Dynamics, IIT-Madras, Jan,1999. Kluwer  Academic Publishers, Dordrecht.


3. K.S. Jagadish and RNI, Editors. Recent Advances in Structural Engineering, 2005. Universities Press, Hyderabad.

4.RNI: Elements of Mechanical Vibrations, Under Preparation.


Technical Reports

1. R.N. Iyengar and K.T.S. Iyengar (1974), 'Seismic Analysis of the Ventilation     stack for the Madras Atomic Power Project’, PPED, Dept. of Atomic Energy.

2. R.N. Iyengar, P.K. Dash & C.V. Joga Pao (1974), ‘Random Vibration of Tubular Structures', Ministry of Defence, Govt. of India.

3. R.N. Iyengar, & S.A. Ramu (1975), ‘Random Vibration of a Satellite Structure',, ISRO, Dept. of Space.

4. R.N. Iyengar, S.A. Ramu & K.J.  Iyengar (1977), ‘Inelastic Response of Structures under Random and Impulsive Loading’, Aero.  Res. and Dev.  Board.

5. R.N. Iyengar (1977), 'Prediction of Food Production Including Rainfall Uncertainties', NCST Panel on Futurology, Department of Science and Technology.

6. R.N. Iyengar (1980), 'Vibration of Thin Cylinders', DRDL, Hyderabad.

7. R.N. Iyengar & S.A. Ramu (1982), ‘Dynamic Stresses in Rotating Shells'.  DRDL, Hyderabad.

8. R.N. Iyengar & K.P. Rao (1982), ‘Piping Analysis under Seismic Forces'.  PPED, Dept. of Atomic Energy.

9. R.N. Iyengar (1983), 'Statistical Analysis of Annual Rainfall in Karnataka', 83, AS4, Centre for Atmospheric Science, IISc., Bangalore.

10. R.N. Iyengar & B.K. Raghuprasad (1983), ‘Spectra Compatible Accelerogram for KAPP’’, PPED, Dept. of Atomic Energy.

11. R.N. Iyengar (1984), 'Track Classification and Track Index', RDSO, Ministry of Railway.

12. R.N. Iyengar (1985), 'Identification of Damping in Railway Vehicles', RDSO, Ministry of Railway.

13. R.N. Iyengar (1986), ' Safety Systems and Coolant Channels of a Nuclear Reactor under Seismic Forces', Nuclear Power Board, Department of Atomic Energy.

14. R.N. Iyengar & K. Meera ( 1986), ‘ Nonlinear Dynamic Analysis of a Railway Freight Car', DST Project Report.

1 5. R.N. Iyengar (1987), 'Uplift and Rocking Motion of a Nuclear Power Plant during Earthquake', Nuclear Power Board, Department of Atomic Energy.

16. R.N. Iyengar (1988), 'Theoretical Slosh Analysis', DRDL, Hyderabad.

17. R.N. Iyengar (1989), 'Spectrum Compatible PSD Function and Floor Response Spectra', NPC, Bombay.

18. R.N. Iyengar & S.A. Ramu (1990), 'Seismic Response of Reactivity Mechanism Assembly', NPC, Bombay.

19. C.S. Manohar & R.N. Iyengar (1990), 'Random Vibration of a Limit Cycle System’, ST/1, Dept. of Civil Engg. IISc.

20. R.N. Iyengar (1990), 'Seismic Response of the NAPP Primary Shutdown System’, NPC, Bombay.

21. R.N. Iyengar (1991), ‘Spectrum Compatible PSD Function and Response Spectra of NAPP', NPC, Bombay.

22. O.R. Jaiswal and R.N. Iyengar (1991), ‘Dynamic Analysis and Random Process Modelling of Railway Tracks' Dept. of Civil Engineering, IISc., Bangalore.

23. S.A. Ramu & R.N. Iyengar (1991), ‘Shock Analysis of Naval Equipment’, Indian Navy, DMDE, Hyderabad.

24. R.N. Iyengar (1992), 'Stochastic Dynamic of a Power Plant Equipments’.  BHEL, Hyderabad.

25. R.N. Iyengar (1993), 'Structural Dynamics of a Uniform Missile', DRDL, Hyderabad.

26. R.N. Iyengar (1993), 'Railway Track Tolerances', RDSO, Department of Railway, Lucknow.

27. R.N.Iyengar, O.R. Jaiswal (1995), ‘Passive Devices to control Seismic Response of Structures', 1/95/DRU, CBRI, Roorkee.

28. R.N. Iyengar & D. Sharma (1998), ‘Earthquake History of India in Medieval times’, DRU, CBRI, Roorkee.

29. R.N. Iyengar, Y. Pandey, Dharmaraju (1998), ‘Strong Motion Seismic Instrumentation in and around Delhi Region’, G(S)012, CBRI, Roorkee.

30. RNI (2001) ‘Review of seismic Design Basis for PFBR-Kalpakkam’ For IGCAR, Kalpakkam

31.RNI (2002)‘Seismic Stability of Mullaperiyar Dam’ for CESS, Govt. of Kerala, Trivandrum.

32.RNI(2003) ‘Seismic Stability of Mullaperiyar-Baby Dam’ for IDRB, Govt. of Kerala, Trivandrum.

33. RNI (2004) Seismic hazard at Baku, Azerbaijan, for M/s W. S. Atkins (India) Pvt. Ltd. Bangalore.


Courses Developed and Taught at IISc at Masters Level

Structural Mechanics.

Structural Dynamics

Theory of Vibration

Engineering Mathematics

Introduction to Random Vibration

Advanced Random Vibration

Design of Structures under Dynamic loading

Probabilistic Methods in Structural Engineering

Statistical Methods in Meteorology


A Short term course entitled 'Probabilistic Approaches in Civil Engineering' for College Teachers was organized during 21 st Feb. to 4th March, 1977.

Eighteen lectures were delivered at IIT, Bombay in Dec. 1977, as part of an intensive course on 'Random Vibration'.

A Special course on ‘Earthquake Engineering' was developed for staff of M/s.  Tata Consulting Engineers, Bangalore, 1987.

Special course on 'Structural Dynamics’ was developed for M/s.  Kirloskar Electricals Limited, Bangalore, 1989.

A Special course on 'Structural Dynamics of Power Plant Equipments' was developed for BHEL, R&D, Hyderabad, 1991.


(Courses taught to be updated)




(Ph. D)



P.K. Das

‘Random Vibration of Nonlinear and Stochastic Systems’.


(Co-guide:C.V.Joga Rao)


K.J. Iyengar

'Inelastic Analysis of Structures under Impulsive and Random loads'.


(Co-guide: S.A. Ramu)


V.J. Sundaram

'Random Vibration and Fatigue of Viscoelastic Propellants'.


(Co-guide: A.K. Rao)


K.C. Prodhan

'Analysis Specification and Synthesis of Strong Motion             Earthquakes'.



C.S. Manohar

'Random Vibration of limit Cycle Systems and Stochastic Strings’.



G.V. Rao

'Vibration on Cables under Deterministic and Random Excitadon



O.R. Jaiswal

'Dynamic Analysis of Railway Tracks'.



D. Roy

'Chaotic and Random Response in Nolinear Oscillators’.



S.K. Agarwal

‘Strong Motion and Seismic Response of Soil Layers’ (From IIT Roorkee)








Engineering Models for Earthquake  Sources

Seismic hazard in NE India



Under progress

M.Sc. Engg.


K. Meera

'Nonlinear Dynamic Analysis of a Railway Freight Car’.



R. Ravi

'Free Vibration of Rectangular Plates with Holes'.



O.R. Jaiswal

'Dynamic Analysis and Random Process Modelling of Railway Tracks'.



M. Varadarajan

'Spectrum compatible Random Processes as Earthquake Excitations'.



S. Basak

'Patterns of Variability of India Monsoon Rainfall’

(Submitted at Centre for Atmospheric Sciences).



S. Raghavachari

‘Vibration of Pipes Resting on Soil Medium’



D.S. Raju

‘Dynamics of Boiler Support Structures’




Seismic Microzonation of Delhi  City                    



Bishaka Basak

Critical Excitation and Inverse Approach in Random Vibration





R. Muthukrishnan

‘Some Studies in Aiiisotropic Circular Plates’.



B.N. Nagaraja

‘Dynamics of Beaiiis under Grinding Forces’



T.K. Saha

‘Response of Caiitilever Structures to Eartliquake Excitation’



G.M. Ammanagi

‘Stochastic Analysis of Monthly River Flows’



M.K. Divekar

'Software for Dynamics for Space Frames’



H.V. Shankar

‘Internal Consistency in Response Spectrum’



M.S. Madangopal

‘Free Vibrational Analysis of Elliptic and Pre forated Plates'



H.A. Visweswara

‘Software for Vibration and Hydrostatic Buckling of Ring Stiffened Cylindrical Shelf’



C.S. Manohar

‘Stochastic Critical Seismic Excitations’



N. Vedagiri

‘Application of the Component Element Method’



N. Mahendar

‘Seismic Respoiise of a Power Plant with Base Allowed to Uplift’



K.R. Reddy

‘Non-linear Rocking of a Rigid Block on Rigid Foundation’



D. Roy

‘Structural Dynamics of Spinning Beams’



Raman Kumar

Non-Gaussian excitation model in Random Vibration



Industrial Consultancy


'Vibration of Thin Cylinders', Ministry of Defence, 1981.

'Vibration of Multistage Thin Cylinders’, (with S.A. Ramu), Ministry of Defence, 1982-83.

'Structural Dynamic Identification of Railway Vehicles’, Ministry of Railways, 1984.

'Structural Dynamic Identification of Railway Vehicles II phase: Track Index Evaluation'.  Ministry of Railway, 1984.

'Piping Analysis under Seismic Forces’, (with K.P. Rao), Department of Atomic Energy, 1982.

‘Spectrum compatible Accelerograms’, Department of Atomic Energy, 1982-83.

'Nonlinear Dynamics of KAPP Raft’, Department of Atomic Energy, 1985-87.

‘NAPP Safety Systems and Coolant Channels under Seismic Forces', Department of Atomic Energy, 1985-86.

'Slosh Frequencies for Cylinders with Inclined Fluid Surface and Ellipsoidal Caps', DRDL, Hyderabad, 1987-88.

'Random Vibration of 500 MW Nuclear Power Plant under SSE Condition', Nuclear Power Corporation. 1988.

'Design of NSTL Shock Tank', MECON, Bangalore, 1985.

'Seismic Analysis of NAPP Reactivity Mechanism', NPC, Bombay, 1989.

‘Classification of Railway Tracks’, RDSO, Lucknow, 1989.

'Floor Response Spectra 235 MW NPP through PSD approach', NPC, Bombay, 1989.

 'Shock Analysis of Naval Equipments’, DMDE, Indian Navy, 1988-90.

'Track Geometry Standards', RDSO, Lucknow.

'Dynamics of Power Plant Piping subjected to Stochastic loading', BHEL, Hyderabad.

'Structural Dynamics of a Flight Vehicle’, ARDE, Pune

'Floor Response Spectra of NAPP', NPC, Bombay.

'Dynamics of a Missile', DRDL, Hyderabad.

‘Review of Design Basis seismic Parameters for PFBR Site’ IGCAR, Kalpakkam.2000-2001

‘Seismic Stability of the Mullaperiyar Dam’ Govt. of Kerala. 2001-2002

‘Seismic Stability of Mullaperiyar-baby Dam’ govt. of Kerala 2002-2003


About 25 other consultancy projects in which Prof.R.N.Iyengar was personally involved, while he was Director CBRI, are not listed here.


Field Experience

Junior Engineer, Mysore State PWD, 1962-63.


Team Leader:  Field Investigations after Khilari (1993) , Chamoli (1999) and Kutch (2001)              Earthquakes.


Team Leader: Post-disaster Rehabilitation and Capacity Building Tasks at Latur and Chamoli