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介绍了一种新型混合介质缓冲器,其中的混合介质由不可压缩的航空机油与可压缩的空心橡胶小球组成。当冲击发生时,液体将动压力瞬间传递到所有小球上,使它们同时参与变形,冲击能量可被大幅度吸收、损耗。若设计得当,这类缓冲器可具有卓越的缓冲性能。本文推导了混合介质缓冲器非线性刚度的计算公式,建立了缓冲器的动力学方程。利用MATLAB得到该方程的数值解,并通过试验验证了动力学模型的准确性。理论分析了不同冲击作用下混合介质缓冲器的各参数对缓冲效果的影响。
A new kind of mixed media buffer is introduced, in which the mixed media consists of incompressible aviation oil and compressible hollow rubber ball. When an impact occurs, the liquid instantly transfers the dynamic pressure to all the balls, allowing them to participate in the deformation at the same time. The impact energy can be greatly absorbed and dissipated. If properly designed, this type of bumper can have excellent cushioning properties. In this paper, the calculation formula of nonlinear stiffness in mixed media buffer is derived and the dynamic equation of the buffer is established. The numerical solution of the equation is obtained by MATLAB, and the accuracy of the dynamic model is verified through experiments. The influence of various parameters of the mixed medium buffer on the buffering effect is analyzed theoretically.