The hydraulic antiresonant vibration isolator mounted in the helicopter isolation system can effectively attenuate the excitation force induced by the helicopter rotor. It possesses the advantages of easy installation, low damping over the levertype antiresonant vibration isolators which are facing the problems of high noise and serious wear. It is composed of two metal bellows and a supplementary spring and possesses an antiresonance frequency, at which the pressure vibration in the fluid induced by the inertial force is in opposite phase to the spring force of the isolator, specially suiting for the isolation of linespectrum vibrations. In the paper, two types of hydraulic antiresonant vibration isolator models were built and isolation bandwidths were developed which are related to the inertia mass and magnification ratio. Furthermore, a train of thought about a 2dof hydraulic antiresonant vibration isolator was put forward to obtain larger bandwidths.
Key words
hydraulic /
anti-resonant /
vibration isolator /
bandwidth /
optimization
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 顾仲权. 动力反共振隔振[J]. 噪声与振动控制,1989,06:36-40+32.
GU Zhongquan. Dynamic anti resonance vibration isolation [J]. Noise and Vibration Control,1989,06:36-40+32.
[2] W.G. Flannelly, Dynamic antiresonant vibration isolator, U.S. Patent No. 3,322,379, 1967.
[3] A.D. Rita, J.H. McGarvey, R. Jones, Helicopter rotor isolation evaluation utilizing the dynamic antiresonant
[4] R.A. Desjardins, Vibration isolation system, U.S. Patent No. 4,140,028, 1979.
[5] R.A. Desjardins, W.E. Hooper, Antiresonant rotor isolation for vibration reduction, Journal of the American Helicopter Society 25 (3) (1980) 46–55.
[6] D. Braun, Development of antiresonance force isolators for helicopter vibration reduction, Journal of the American Helicopter Society 27 (4) (1982) 37–44.
[7] D. Braun, Vibration isolator particularly of the antiresonance force type, U.S. Patent No. 4,781,363, 1988.
[8] 孙忠池. 反共振理论在动力吸振器设计中的应用[J]. 应用力学学报, 1993, 10(4): 97-103.
SUN Zhongchi. The application of anti-resonance theory in design of vibration absorbers [J]. Chinese Journal of Applied Mechanics
[9] C. Yilmaz,N. Kikuchi. Analysis and design of passive band-stop filter-type vibration isolators for low-frequency applications[J]. Journal of Sound and Vibration,2005,2913:.
[10] Yilmaz C, Kikuchi N. Analysis and design of passive low-pass filter-type vibration isolators considering stiffness and mass limitations[J]. Journal of sound and vibration, 2006, 293(1): 171-195.
[11] 刘春嵘,冀建飞,徐道临. 反共振流体浮筏的隔振特性研究[J]. 力学与实践,2012,02:49-53.
LIU Chunrong, Ji Jianfei, XU Daolin. Vibration isolation of fluid-type anti-resonance floating raft system [J]. Mechanics in Engineering, 2012,02:49-53.
[12] Xiuchang H, Aihua J, Zhiyi Z, et al. Design and optimization of periodic structure mechanical filter in suppression of foundation resonances[J]. Journal of Sound and Vibration, 2011, 330(20): 4689-4712.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(1306 KB)
