金属橡胶非线性隔振器试验研究与参数分析

摘要

研究了变激励条件下金属橡胶非线性隔振器的参数变化。以某型隔振器为研究对象，对其进行了静态试验及不同正弦激励条件下动态试验。借助双折线泛函本构关系的本构模型，利用粒子群优化算法对不同激励条件下的隔振器模型参数进行了识别，通过识别参数的对比得到了隔振器各参数在不同激励情况下的变化趋势。结果显示对金属橡胶非线性隔振系统进行动力学分析时，必须首先对实际工况下隔振器进行动态试验。再通过参数识别获取隔振器准确的数学模型，才能对金属橡胶隔振系统进行准确的动力学分析。为金属橡胶隔振系统的动力学分析提供了一般方法。%The parameters change rule of a nonlinear metal-rubber isolator under different incentive conditions was studied. Firstly, both the static experiment and the dynamic experiment under the conditions of different sinusoidal excita-tions were carried out. On this basis, the bilinear functional constitutive relation model was established. Then, the parameters of the metal-rubber isolator in different incentive conditions were identified by using Particle Swarm Optimization Algo-rithm. Finally, the parameters change rule of the nonlinear metal-rubber isolator was obtained by comparison of the identifi-cation results with the experimental results. It is shown that the dynamic experiment is necessary and the right parameters should be identified under the pertinent incentives before analyzing the nonlinear metal-rubber isolation system. The results of the study may provide a general method for dynamic analysis of the metal-rubber vibration isolation systems.