剪切变形下橡胶支座压缩刚度比分析研究

发布时间：2018-03-26 09:36

本文选题：橡胶支座　切入点：压缩刚度　出处：《工程力学》2017年01期

【摘要】：为了研究不同截面形状橡胶支座在剪切变形下的压缩刚度,该文分别基于双弹簧模型与有效面积模型推导了四种截面形状(环形、圆形、方形及矩形)支座的压缩刚度比公式,然后采用ABAQUS建立七个支座有限元模型,结合已有的支座压缩及剪切试验,验证所建立的有限元模型能够准确模拟橡胶支座的实际受力情况,在此基础上,结合理论模型对比分析了不同支座的压缩性能。分析结果表明:压缩及剪切试验中,支座刚度计算值与试验值相差均在5%以内;支座压缩刚度比只与剪切变形与截面惯性半径比值有关,与截面形状及截面尺寸大小无关;该文建立的模型及拟合刚度比公式能够有效模拟橡胶支座在不同剪切变形下的压缩刚度变化情况。
[Abstract]:In order to study the compression stiffness of rubber bearings with different cross-section shapes under shear deformation, the compression stiffness ratio formulas of four cross-section supports (annular, circular, square and rectangular) are derived based on the two-spring model and the effective area model, respectively. Then ABAQUS is used to establish the finite element model of seven supports. Combined with the compression and shear tests of the existing supports, it is verified that the established finite element model can accurately simulate the actual force situation of the rubber bearing, and on this basis, The compression performance of different supports is compared with the theoretical model. The results show that the stiffness of the bearing is less than 5% different from that of the test in compression and shear tests. The compression stiffness ratio of the bearing is only related to the ratio of shear deformation to the radius of inertia of the section, but not to the shape of the section and the size of the section. The model established in this paper and the fitting stiffness ratio formula can effectively simulate the change of compression stiffness of rubber bearing under different shear deformation.
【作者单位】：北京交通大学土木建筑工程学院;
【基金】：国家自然科学基金项目(51578046,51408031)
【分类号】：TU352.12

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