Formulation, validation, and application of a finite element model for elastomeric lag dampers

Journal of the American Helicopter Society

Volumn 41, Issue 3, 1996, Pages 247-256

  Smith, Edward C ^a   Govindswamy, Kiran ^a   Beale, Michael R ^a   Lesieutre, George A ^a  

^a The Pennsylvania State University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ANELASTIC RELAXATION; DAMPING; ELASTIC MODULI; ELASTOMERS; FINITE ELEMENT METHOD; LINEARIZATION; MATHEMATICAL MODELS; SHEAR STRESS; STABILITY; STRAIN RATE; TIME DOMAIN ANALYSIS; VISCOELASTICITY;

ANELASTIC DISPLACEMENT FIELDS; ELASTOMERIC LAG DAMPERS; SNUBBER DAMPER MODEL;

HELICOPTERS;

EID: 0030192632     PISSN: 00028711     EISSN: None     Source Type: Journal    
DOI: 10.4050/jahs.41.247     Document Type: Article

References (33)

1. McGuire, O.P., "The Application of Elastomeric Lead-Lag Dampers to Helicopter Rotors," Lord Corporation Library of Technical Papers LL-2133, Erie, Pennsylvania, 1976.
2. Hausmann, G., "Structural Analysis and Design Considerations of Elastomeric Dampers With Viscoelastic Material Behavior," Proceedings of the 12th European Rotorcraft Forum, Garmisch-Partenkirchen, Federal Republic of Germany, Sep 22-25, 1986.
3. Hausmann, G. and Gergley, P., "Approximate Methods for Thermoviscoelastic Characterization and Analysis of Elastomeric LeadLag Dampers," Proceedings of the 18th European Rotorcraft Forum, Avignon, France, Sep 15-18, 1992.
4. Felker, F.F., Lau, B.H., McLaughlin, S., and Johnson, W., "Non-linear Behavior of an Elastomeric Lag Damper Undergoing Dual Frequency Motion and its Effect on Rotor Dynamics," Journal of the American Helicopter Society, Vol. 34, No. 4, Oct 1987.
5. Bir, O.S. and Chopra, I., "Effect of Nonlinear Elastomeric Dampers on Aeromechanical Stability of Helicopters," Presented at the International Technical Specialists Meeting on Rotorcraft Basic Research, Georgia Institute of Technology, Mar 25-27, 1991.
6. Sorenson, J.L., Silverthorn, L.J., and Maier, T.H., "Dynamic Characteristics of Advanced Bearingless Rotors at McDonnell Douglas Helicopter Company," Proceedings of the 44th American Helicopter Society Annual Forum, Washington, D.C., May 1988.
7. Huber, H. "Dynamic Aspects in the Design of a Bearingless Rotor, Presented at the 4th Workshop on Dynamics and Aeroelastic Stability Modeling of Rotorcraft Systems, University of Maryland, Nov 1991.
8. Ichihashi, T. and Bandoh, S., "Design, Fabrication, and Testing of the Composite Bearingless Rotor System for Rotary-Wing Aircraft," Proceedings of the 18th European Rotorcraft Forum, Avignon, France, Sep 1992.
9. Norman, T., Cooper, C.R., Fredrickson, C.A., and Herter, J.R., "Full-Scale Wind Tunnel Evaluation of the Sikorsky Five-Bladed Bearingless Main Rotor," Proceedings of the 49th American Helicopter Society Annual Forum, St. Louis, Missouri, May 1993.
10. Nguyen, K., McNulty, M., Vaidyanathan, A., and Lauzon, D., "Aeroelastic Stability of the McDonnell Douglas Advanced Bearingless Rotor," Proceedings of the 49th American Helicopter Society Annual Forum, St. Louis, Missouri, May 1993.
11. Harse, J. "The Four-Bladed Main Rotor System for the AH-IW Helicopter," Proceedings of the 45th American Helicopter Society Annual Forum, Boston, Massachusetts, May 1989.
12. Enenkl, B. and Kloppel, V., "Design Verification and Flight Testing of a Bearingless Soft Inplanc Tail Rotor," Proceedings of the 42nd American Helicopter Society Annual Forum, Washington, D.C., May 1986.
13. Cresap,W.L. and Myers, A.W., "Design and Development of the Model 412 Helicopter," Proceedings of the 36th American Helicopter Society Annual Forum, Washington, D.C., May 1980.
14. Shaw, J., Dadone, L., and Wiesner, R., "Rotorcraft Technology at Boeing Vertol: Recent Advances," Proceedings of the NASA/Army Rotorcraft Technology Conference, Vol. 3, Moffett Field, California, Mar 1987.
15. Flügge, W., Viscoelasticity, Second Revised Edition, Springer-Verlag, New York, 1975.
16. Ferry, J.D., Viscoelastic Properties of Polymers, Third Edition, John Wiley & Sons, New York, 1980.
17. 17 Nashif, A.D., Jones, D.I.G, and Henderson, J.P., Vibration Damping, John Wiley & Sons, New York, 1985.
18. Nowick, A.S. and Berry, B.S., Anelastic Relaxation in Crystalline Solids, Academic Press, New York, 1972.
19. Lazan, B.J., Damping of Materials and Members in Structural Mechanics, Pergamon Press, New York, 1968.
20. Gandhi, F., Chopra, I., and Lee, S.W., "A Nonlinear Viscoelastic Damper Model: Constitutive Equation and Solution Scheme," Proceedings of the North American Conference on Smart Structures and Materials, Orlando, Florida, Feb 1994.
21. Gandhi, F., Chopra, I., "An Analytical Model for a Nonlinear Elastomeric Lag Damper and its effect on Aeromechanical Stability in Hover," Proceedings of the American Helicopter Society Aeromechanics Specialists Conference, San Francisco, California, Jan 1994.
22. Gandhi, F., Chopra, I., "Elastomeric Lag Damper Effects on Flap-Lag Stability in Forward Flight," Proceedings of the 35th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Hilton Head, Apr 1994.
23. Ingle, S.J., Weber, T.L., and Miller, D.O., "Concurrent Handling Qualities and Aeroservoelastic Specification Compliance for the RAH-66 Comanche," Presented at the American Helicopter Society Aeromechanical Specialist Conference, San Francisco, California, Jan 19-21, 1994.
24. Lesieutre, G.A., and Bianchini, E., "Time-Domain Modeling of Linear Viscoelasticity using Augmenting Thermodynamic Fields," Proceedings of the 34th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, La Jolla, Apr 1993.
25. Lesieutre, G.A., Bianchini, E., and Maiani, A., "The Use of Anelastic Displacement Fields in Finite Element Modeling of Viscoelastic Structures," submitted to Journal of Guidance, Control, and Dynamics, 1993.
26. Lesieutre, G.A., "Finite Element Modeling of Frequency Dependent Material Properties Using Augmenting Thermodynamic Fields," Journal of Guidance, Control, and Dynamics, Vol. 13, No. 6, Nov-Dec 1990.
27. Lesieutre, G.A, "Finite Elements for Dynamic Modeling of Uniaxial Rods With Frequency Dependent Material Properties," International Journal of Solids and Structures, Vol. 29, No. 12, Dec 1992.
28. Lesieutre, O.A. and Bianchini, E., "Time Domain Modeling of Linear Viscoelasticity Using Anelastic Displacement Fields," Submitted for publication in Journal of Vibration and Acoustics, June 1993.
29. Lesieutre, G.A, and Govindswamy, K., "Modeling Temperature and Frequency Dependent Dynamic Behavior of Viscoelastic Structures Using Anelastic Displacement Fields," presented at 35th AIAA/ASME/ ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Hilton Head, South Carolina, Apr 1994.
30. Lesieutre, G.A., and Govindswamy, K., "Finite Element Modeling of Frequency-Dependent and Temperature-Dependent Dynamic Behavior of Viscoelastic Materials in Simple Shear," International Journal of Solids and Structures, in press, 1995.
31. Govindswamy, K., Lesieutre, O.A., Smith, E.G., and Beale, M.R., "Characterization and Modeling of Strain-Dependent Dynamic Behavior of Viscoelastic Elastomers in Simple Shear," submitted to the International Journal of Solids and Structures.
32. Govindswamy, K., Lesieutre, G.A., Smith, E.C., and Beale, M.R., "Characterization and Modeling of Strain-Dependent Dynamic Behavior of Viscoelastic Elastomers in Simple Shear," presented at the 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, New Orleans, Apr 1995.
33. Smith, E.C., Beale, M.R., Govindswamy, K., Vascsinec, M.J, and Lesieutre, G.A., "Formulation, Validation, and Application of a Finite Element Model for Elastomeric Lag Dampers," presented at the American Helicopter's 51st Annual Forum, Fort Worth, Texas, May 9-11, 1995.