寿命周期构型变化类橡胶减振器使用寿命评估

Useful Life Prediction of Rubber Isolator with Deformable Lifetime Structural Morphology

针对现有橡胶减振器寿命计算理论的局限性和部分橡胶减振器使用寿命评估困难的问题,提出将橡胶减振器分为寿命周期构型不变类橡胶减振器和寿命周期构型变化类橡胶减振器两类,并归纳了后者的5个主要特点。首先,分析了其失效机理和寿命特征参数选取原则;然后,设计并开展了基于力控制温度应力加速的构型变化类橡胶减振器加速退化试验,给出了试验数据处理方法和基于加速试验的橡胶减振器寿命评估方法;最后,确定了被试橡胶减振器寿命特征参数退化轨迹模型及温度应力加速模型。结果表明,使用加速模型外推计算的正常温度下减振器使用寿命与实际使用情况较为吻合。本研究对寿命周期构型变化类橡胶减振器的使用寿命评估工作具有一定的指导意义。

In allusion to the limitations of the existing useful life prediction theory for rubber isolators,the rubber isolators are classified into two types:the deformable structural morphology and the undeformable one during the whole useful life.For the former type,its main characteristics,failure mechanism and the selection principle for life characteristic parameters are summarized.Its force-controlled temperature-accelerated degradation test is designed and its data analysis method is also presented.The method to predict the useful life of rubber isolator based on the accelerated tests is introduced,the degradation path model of the life characteristic parameters and the temperature stress acceleration model are determinated.The calculated results of the useful life under normal temperature are consistent with the actual lifetime.The calculation method provides guidance for the useful life prediction of deformable rubber isolators with lifetime structural morphology.