为了限制隔振系统在受到冲击载荷时位移超过允许范围，通常在隔振系统中安装限位器。以带限位双层隔离系统为研究对象，提出坐标平移的方法，以不同刚度段的虚拟平衡点为原点建立新的坐标系，分段建立线性方程。采用模态叠加法对冲击方程进行解析求解，进而利用MATLAB仿真来计算冲击响应，设计了带限位器的试验装置与仿真结果进行对比。研究结果表明：通过坐标平移法建立的线性方程具有标准形式，可以通过模态叠加法直接进行求解；仿真计算结果与试验结果具有较高的一致性，证明了所建立的模型的正确性。
关键词：限位器；分段线性；冲击响应；双层隔离系统；模态叠加
Abstract
In order to limit the displacement of the vibration isolation system to exceed the allowable range when subjected to a shock load, displacement restrictors are usually installed in the vibration isolation system. Taking the double-deck vibration isolation system with displacement restrictors as the research object, the method of coordinate translation is proposed. A new coordinate system is established with the virtual equilibrium points of different stiffness sections as the origin, and the linear equation is established in sections. The modal superposition method is used to analyze the shock equation, and then MATLAB simulation is used to analyze the influence of the displacement restrictor parameters on the shock response of the double-deck vibration isolation system, and compare it with the single-deck system. The research results show that the linear equation established by the coordinate translation method has a standard form and can be solved directly by the modal superposition method; the influence law of the displacement restrictor parameters on the shock response of the double-deck vibration isolation system is obtained to provide a reference for the design of the displacement restrictor.
Key words: displacement restrictor; piecewise linear; shock response; double-deck vibration isolation system; mode superposition method
关键词
限位器 /
分段线性 /
冲击响应 /
双层隔离系统 /
模态叠加
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Key words
displacement restrictor /
piecewise linear /
shock response /
double-deck vibration isolation system /
mode superposition method
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