Embedded absorbers for helicopter rotor lag damping

Journal of Sound and Vibration

Volumn 325, Issue 4-5, 2009, Pages 705-721

  Byers, Lynn ^a   Gandhi, Farhan ^a  

^a The Pennsylvania State University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AEROELASTIC INSTABILITIES; BLADE CHORD; BLADE TIP; CENTER OF GRAVITY; CENTRIFUGAL LOADS; DAMPED VIBRATIONS; DYNAMIC PITCH; DYNAMIC STIFFNESS; FORWARD FLIGHT; FREQUENCY-DEPENDENT; LEAD-LAG; LINK LOADS; NONLINEAR SPRINGS; ROTOR BLADES; STATIC DISPLACEMENT; STATIC STIFFNESS;

CENTRIFUGATION; DAMPING; STIFFNESS; TURBOMACHINE BLADES;

HELICOPTER ROTORS;

EID: 67649472775     PISSN: 0022460X     EISSN: 10958568     Source Type: Journal    
DOI: 10.1016/j.jsv.2009.03.031     Document Type: Article

References (32)

1. Lytwyn R.T., Miao W., and Woitsch W. Airborne and ground resonance of hingeless rotors. Journal of the American Helicopter Society 16 2 (1971) 2-9
2. Chopra I. Perspectives in aeromechanical stability of helicopter rotors. Vertica 14 4 (1990) 457-508
3. Ormiston R.A. Rotor-fuselage dynamics of helicopter air and ground resonance. Journal of the American Helicopter Society 36 2 (1991) 3-20
4. Felker F., Lau B., McLaughlin S., and Johnson W. Nonlinear behavior of an elastomeric lag damper undergoing dual frequency motion and its effect on rotor dynamics. Journal of the American Helicopter Society 32 4 (1987)
5. Gandhi F., and Chopra I. An analytical model for a nonlinear elastomeric lag damper and its effect on aeromechanical stability in hover. Journal of the American Helicopter Society 39 4 (1994) 59-69
6. Gandhi F., and Chopra I. Analysis of bearingless main rotor aeroelasticity using an improved time-domain nonlinear elastomeric damper model. Journal of the American Helicopter Society 41 3 (1996) 267-277
7. Smith E., Govindswamy K., and Beale M. Formulation, validation, and application of a finite element model for elastomeric lag dampers. Journal of the American Helicopter Society 41 3 (1996) 247-255
8. Brackbill C., et al. Application of a refined time domain elastomeric damper model to helicopter rotor aeroelastic response and stability. Journal of the American Helicopter Society 47 3 (2002) 186-197
9. Kunz D. Elastomer modeling for use in predicting helicopter lag damper behavior. Journal of Sound and Vibration 226 3 (1999) 585-594
10. Marathe S., Gandhi F., and Wang K. Helicopter blade response and aeromechanical stability with a magnetorheological fluid based lag damper. Journal of Intelligent Material Systems and Structures 9 4 (1998) 272-282
11. Kamath G., Wereley N., and Jolly M. Characterization of magnetorheological helicopter lag dampers. Journal of the American Helicopter Society 44 3 (1999) 234-248
12. Snyder R., Kamath G., and Wereley N. Characterization and analysis of magnetorheological damper behavior under sinusoidal loading. AIAA Journal 39 7 (2001)
13. Gandhi F., Wang K.W., and Xia L. Magnetorheological fluid damper feedback linearization control for helicopter rotor application. Smart Materials and Structures 10 (2001) 96-103
14. Zhao Y., Choi Y., and Wereley N. Semi-active damping of ground resonance in helicopters using magnetorheological dampers. Journal of the American Helicopter Society 49 4 (2004) 468-482
15. Hu W., Wereley N.M., Chemouni L., and Chen P. Semi-active linear stroke magnetorheological fluid-elastic helicopter lag damper. Journal of Guidance Control and Dynamics 30 2 (2007) 565-575
16. Bousman W.G. An experimental investigation of the effects of aeroelastic couplings on aeromechanical stability of a hingeless rotor helicopter. Journal of the American Helicopter Society 26 1 (1981) 46-54
17. Ormiston R.A. Investigations of hingeless rotor stability. Vertica 7 2 (1983) 143-181
18. Zotto M.D., and Loewy R.G. Influence of pitch-lag coupling on damping requirements to stabilize ground/air resonance. Journal of the American Helicopter Society 37 4 (1992) 68-71
19. Gandhi F., and Hathaway E. Optimized aeroelastic couplings for alleviation of helicopter ground resonance. Journal of Aircraft 35 4 (1998) 582-590
20. Hathaway E., and Gandhi F. Concurrent optimization of aeroelastic couplings and rotor stiffness for the alleviation of helicopter aeromechanical instability. Journal of Aircraft 38 1 (2001) 69-80
21. Kang H., Smith E., and Lesieutre G. Experimental and analytical study of blade lag damping augmentation using chordwise absorbers. Journal of Aircraft 43 1 (2006)
22. H. Kang, Blade Lag Damping Using Embedded Chordwise Absorbers, PhD Thesis, The Pennsylvania State University, August 2001.
23. J. Petrie, G. Lesieutre, E. Smith, Helicopter blade lag damping using embedded fluid elastic inertial dampers, Proceedings of the 45th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Palm Springs, CA, April 2004.
24. J. Petrie, G. Lesieutre, E. Smith, Design and model testing of helicopter rotor blade lag fluid elastic embedded chordwise inertial dampers, Presented at the American Helicopter Society 61st Annual Forum, Grapevine, TX, June 1-3, 2005.
25. L. Byers, F. Gandhi, Helicopter rotor lag damping augmentation based on a radial absorber and coriolis coupling, Presented at the American Helicopter Society 61st Annual Forum, Grapevine, TX, June 1-3, 2005.
26. L. Byers, F. Gandhi, Rotor blade with radial absorber (Coriolis Damper)-loads evaluation, Presented at the American Helicopter Society 62nd Annual Forum, Phoenix, AZ, May 9-11, 2006.
27. L. Byers, Helicopter Rotor Lag Damping Augmentation Based on a Radial Absorber and Coriolis Coupling, PhD Thesis, The Pennsylvania State University, August 2006.
28. Winterflood J., Barber T., and Blair D. Mathematical analysis of an Euler spring vibration isolator. Physics Letters A 300 (2002) 131-139
29. Winterflood J., Blair D., and Slagmolen B. High performance vibration isolation using springs in Euler column buckling mode. Physics Letters A 300 (2002) 122-130
30. Chin E., et al. Low frequency vertical geometric anti-spring vibration isolators. Physics Letters A 336 (2005) 97-106
31. Virgin L., and Davis R. Vibration isolation using buckled struts. Journal of Sound and Vibration 260 5 (2003) 965-973
32. Ji J., and Hansen C. Non-linear response of a post-buckled beam subjected to a harmonic axial excitation. Journal of Sound and Vibration 227 2 (2000) 303-318