A type of solid and liquid mixture isolator

作者：Teng H D; Chen Q^*

来源：Journal of Vibration and Control, 2011, 17(3): 421-429.

DOI：10.1177/1077546309360048

• Isolator
• nonlinear stiffness
• shock absorbing
• solid and liquid mixture
• vibration control

In this paper we describe a type of new vibration isolator that is based on solid and liquid mixture (SALiM). The SALiM consists of incompressible liquid and many compressible elastic solid elements. When under shocks or vibrations, the incompressible liquid can instantly pass the pressure on to all solid elements in the container of the isolator, which causes all the solid elements to compress and deform simultaneously. As a result it could greatly absorb and dissipate the energy of vibrations and shocks. If designed properly, the isolator could have an excellent performance on both vibration isolation and shock absorbing. This paper uses hollow rubber spheres as solid elements, and investigates the dynamic properties of an isolator, assuming that the solid elements undergo finite deformation. The nonlinear forced-displacement relation of the isolator is investigated. The nonlinear equation of motion of a single degree of freedom system supported by the isolator is established. The frequency response functions are evaluated theoretically and measured on a test rig, which shows positive agreement on the nonlinear dynamic behaviors. It is concluded that the isolator responses are asymmetrical and the stiffness of the isolator has softening spring characteristics.

• 出版日期2011-3
• 单位南京航空航天大学