考虑老化时间影响的隔震支座橡胶本构Moony-Rivlin模型常数研究

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摘要目前Moony-Rivlin模型被广泛应用于橡胶隔震支座的有限元分析中，其中，材料常数的标定是关键环节。为充分了解老化作用对橡胶材料常数的影响，采用最小二乘拟合法计算老化试验后的Moony-Rivlin模型材料常数，拟合出材料常数随老化时间的变化关系式，提出了修正Moony-Rivlin模型，并将拟合值和计算值进行对比。最后，根据上述方法确定的材料常数用Abaqus软件对隔震橡胶支座老化前后的性能进行了模拟分析，并将有限元分析结果与试验结果进行对比。结果表明：随着老化时间的增加，Moony-Rivlin模型常数逐渐增大；老化前、后橡胶隔震支座的竖向刚度、水平刚度试验测试与有限元模拟值的误差均在可接受的范围内，验证了所建立修正本构模型的准确性，可为橡胶隔震支座老化性能的研究和桥梁等结构全寿命性能设计提供理论支撑。

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关键词 ： Moony-Rivlin模型常数, 橡胶, 老化, 有限元分析

Abstract：At present the Moony-Rivlin model is widely applied in finite element analysis of rubber isolators, a key point is to determined the material parameters of the model. In order to research the effect of aging on material constant of rubber intensively, through studing aging test result of rubber by the Least-square method, the material constants of Moony-Rivlin model were obtained, the relationship between the material constant and the aging time was derived, and a modified model of is given. Then, the fitting values were compared with the calculating values. Finally, the performance of the rubber isolators was simulated and studied by using the Abaqus software and the material constant determined from the above method, and, the results of finite element analysis were compared with the test results. The results show that: Moony-Rivlin model constant increases gradually with the increase of the aging time; the errors between the test values and the finite element simulation values for the vertical stiffness and the horizontal stiffness are acceptable, whether before aging or aged, so the accuracy of the modified constitutive model is verified, which can provide theoretical support for the performance study of rubber isolated bearings under the aging environment and the life-cycle performance design about bridges and other structures.

Key words： Moony-Rivlin model constant rubber aging finite element analysis

收稿日期: 2015-12-07 出版日期: 2016-08-15

引用本文:

李艳敏1，马玉宏1，罗佳润2 赵桂峰3. 考虑老化时间影响的隔震支座橡胶本构Moony-Rivlin模型常数研究[J]. 振动与冲击, 2016, 35(16): 164-169.
LI Yanmin1,MA Yuhong1,LUO Jiarun2, ZHAO Guifeng3. The effect of aging on the material constant of the rubber isolator’s constitutive model Moony-Rivlin. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(16): 164-169.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I16/164

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