Fiber-reinforced elastomeric isolators (FREIs) are generally installed in unbonded configurations. Because of the simultaneous application of axial loads and large lateral deformations, instability of these bearings is a major concern. This paper shows the results of a large series of 3D finite element analyses (FEAs) on square-shaped FREIs. The analyses aimed at obtaining easy to use design charts where the stability limits of these devices can be rapidly determined. The output of the analyses is compared to analytical results available in literature and the limitations of well-known closed form solutions are discussed.

中文翻译：

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方形无粘结纤维增强隔振器的稳定性分析

纤维增强弹性体隔振器 (FREI) 通常安装在非粘合配置中。由于同时施加轴向载荷和大的横向变形，这些轴承的不稳定性是一个主要问题。本文展示了对方形 FREI 进行大量 3D 有限元分析 (FEA) 的结果。分析旨在获得易于使用的设计图表，其中可以快速确定这些设备的稳定性极限。分析的输出与文献中可用的分析结果进行了比较，并讨论了众所周知的封闭形式解决方案的局限性。