Abstract:The Bellows type Solid and Liquid Mixture (B-SALiM) vibration isolator, mainly proposed for vibration isolation of heavy machines with low frequency, consists of a multi-layers bellows container filled with SALiM working media including elastic elements and incompressible liquid. The dual-chamber SALiM vibration isolator is a B-SALiM vibration isolator linked with an incompressible pressure vessel by a tube and a valve. Based on the knowledge of fluid mechanics and dynamics, this paper established the nonlinear dynamics model of the novel vibration isolation system. To simplify the analysis of the stiffness and damping,the linear dynamics model and the complex stiffness were derived by simplifying the fluid damping into linear viscous damping when the isolator is excited by sinusoidal signal. Numerical simulation and experiment were done to analyze the properties of the stiffness and loss factor. The results show that the stiffness and loss factor of the dual-chamber SALiM vibration isolator are affected by many factors such as the valve aperture/the main chamber stiffness /the exciting frequency/the vibration level and so on. Experiment was implemented to verify the reliability of the nonlinear dynamic model, the experimental results were generally consistent with the theoretical. It also could be derived from the experimental results that the oil vibration in the tube could cause bad effects on the vibration isolation effectiveness.
李方硕,陈前,周俊辉. 双腔液固混合介质隔振器刚度阻尼特性分析[J]. 振动与冲击, 2016, 35(10): 91-95.
Li Fang Shuo,CHEN Qian,Zhou Junhui. The properties of the stiffness and damping of dual-chamber liquid and solid mixture vibration isolator. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(10): 91-95.
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