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Coupled structural and heat conduction FE analysis of laminated high damping rubber bearing

机译：层压高阻尼橡胶轴承耦合结构和导热FE分析

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摘要

A framework for coupled structural and heat conduction finite element analysis is developed for laminated high damping rubber bearings (HDRBs), and coupled analyses are conducted for full-scale tests of an HDRB using the shaking table at E-Defense. An HDRB, which is used in base-isolated buildings, is modeled using hexahedral solid elements. The high damping rubber is modeled as an overlaid viscohyperelastic and elastic-plastic constitutive model. However, material parameters are identified using the results for the HDRB subjected to one-directional loading, and temperature dependences of the parameters are taken into account by a simple method based on empirical formulae for the HDRB because no cyclic coupon test was conducted for the high damping rubber used in the full-scale tests. The combined structural and heat conduction analyses are conducted for a number of loading cases. The same hexahedral mesh of the HDRB is used for both structural and heat conduction analyses. Analysis results are presented for a one-directional cyclic loading test, two-directional loading test with elliptical orbit, and earthquake loading test. The results obtained by the tests and those obtained by the coupled structural and heat conduction analyses are compared. The coupling effect of the mechanical and thermal behaviors is clearly shown in the analysis results, although reductions of the equivalent stiffness and damping are not large because the number of loading cycles in the present analyses is limited.
机译：为层叠的高阻尼橡胶轴承（HDRB）开发了一种用于耦合结构和导热有限元分析的框架，并在电子防御时使用摇动台进行HDRB的全尺度测试进行耦合分析。使用六面体固体元素建模的用于基座隔离建筑物的HDRB。高阻尼橡胶被建模为覆盖的粘液式弹性和弹性塑性本构模型。然而，使用对单向加载的HDRB的结果识别材料参数，通过基于HDRB的经验公式的简单方法考虑参数的温度依赖性，因为没有为高处进行循环优惠券测试阻尼橡胶用于满量程测试。组合的结构和热传导分析用于许多装载案例。 HDRB的相同六半曲线网用于结构和导热分析。呈现分析结果，用于单向循环加载试验，双向加载试验，椭圆轨道和地震载荷试验。比较了通过测试获得的结果和通过偶联的结构和热传导分析获得的结果。在分析结果中清楚地示出了机械和热行为的耦合效果，尽管等效刚度和阻尼的减少不大，因为本分析中的装载循环的数量有限。

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