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采用粘弹性-超弹性-弹塑性材料本构模型,对一种新型的橡胶隔振器进行了动态特性研究,并与已有实验结果进行了对比。根据所得到的恢复力-位移迟滞回线,研究了频率、动态位移幅值对橡胶隔振器的动刚度的影响。在此基础上,给出了这种新型橡胶隔振器的非线性恢复力模型并进行了参数辨识。根据所得恢复力模型对隔振器系统进行了动力性能研究,发现此橡胶隔振器在低频时隔振作用很小,但在高频时隔振效果明显且随频率增加力传递率逐渐减小,隔振效果最大可达到96%。该隔振器的建模和参数辨识方法为这类隔振器的优化设计和工程应用提供了理论依据和分析方法。
Using a viscoelastic - superelastic - elastoplastic constitutive model, a new type of rubber vibration isolator was studied for its dynamic characteristics and compared with the existing experimental results. Based on the obtained restoring force - displacement hysteresis loop, the influence of frequency and dynamic displacement amplitude on the dynamic stiffness of rubber vibration isolator is studied. On this basis, the nonlinear restoring force model of this new type of rubber vibration isolator is given and the parameters are identified. According to the obtained restoring force model, the dynamic performance of the vibration isolator system is studied. It is found that this rubber vibration isolator has a very small vibration isolation effect at low frequency but has obvious vibration isolation effect at high frequency and gradually decreases with increasing frequency , The maximum vibration isolation effect can reach 96%. The vibration isolator modeling and parameter identification methods provide the theoretical basis and analysis method for the optimization design and engineering application of such isolators.