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Dynamic analysis of high static low dynamic stiffness vibration isolation mounts

机译:高静态低动态刚度隔振架的动力学分析

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摘要

The high static low dynamic stiffness (HSLDS) concept is a design strategy for an anti-vibration mount that seeks to increase isolation by lowering the natural frequency of the mount, whilst maintaining the same static load bearing capacity. Previous studies have successfully analysed many features of the response by modelling the concept as a Duffing oscillator. This study extends the previous findings by characterising the HSLDS model in terms of two simple parameters. A fifth-order polynomial model allows us to explore the effects of these parameters. We analyse the steady-state response, showing that simple changes to the shape of the force displacement curve can have large effects on the amplitude and frequency of peak response, and can even lead to unbounded response at certain levels of excitation. Harmonics of the fundamental response are also analysed, and it is shown that they are unlikely to pose significant design limitations. Predictions compare well to simulation results.
机译:高静态低动态刚度(HSLDS)概念是一种防振安装架的设计策略,它旨在通过降低安装架的固有频率来增加隔离度,同时保持相同的静态承载能力。以前的研究通过将概念建模为Duffing振荡器成功地分析了响应的许多特征。这项研究通过根据两个简单参数表征HSLDS模型,扩展了先前的发现。五阶多项式模型使我们能够探索这些参数的影响。我们分析了稳态响应,结果表明,简单地改变力位移曲线的形状可能会对峰值响应的幅度和频率产生很大影响,甚至可能在一定程度的激励下导致无限响应。还对基本响应的谐波进行了分析,结果表明它们不太可能对设计造成重大限制。预测与仿真结果比较良好。

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