基于有限元分析的橡胶减振器优化设计

目的加快橡胶减振器的设计过程。方法分析橡胶材料及Mooney-Rivllin橡胶本构模型特点,介绍橡胶减振器应用特点及隔振设计的相关理论,采用Mooney-Rivllin模型模拟橡胶材料的力学特性,通过引进有限元优化技术,在设计初期保证减振器的刚度特性。结果在某设备减振设计中,采用单轴拉压曲线获取了橡胶材料的Mooney-Rivllin模型参数,以减振器的部分结构尺寸为设计参数,减振器的三向刚度为设计目标,获取了三轴向频率近似相等的隔振系统(轴向频率40 Hz、径向频率40.9 Hz)。通过试验测试,减振系统频率与试验值差别较小,其中轴向差别为2%,径向差别为1%。结论通过引进有限元优化技术,采用合理的橡胶本构模型,可以满足工程精度要求,加速了橡胶减振器的设计过程。

Structure Optimization of Rubber Absorber Based on Finite Element Analysis

Objective To speed up the design process of rubber absorber. Methods The characteristics of rubber material and the Mooney-Rivllin rubber constitutive model were analyzed. The characteristics of rubber absorber and the basic theory of vibration isolation design were introduced. Mechanical properties of rubber materials were simulated with Mooney-Rivllin model. By introducing the finite element optimization design technology, the stiffness characteristics of absorber was guaranteed in the early design stage. Results In the vibration damping design of a certain equipment, parameters of Mooney-Rivllin model for rubber materials were obtained with an uniaxial tension and compression curve. With the design parameters of the vibration damper part structure and the three direction stiffness of the absorber as the design target, the vibration isolation system (axial frequency 40 Hz, radial frequency 40.9 Hz) with the same three axial stiffness was designed. The test shows that there was small difference between frequency and test values of the vibration reduction system. The axial difference was 2% and the radial difference was 1%. Conclusion By introducing the finite element optimization technology, the design of rubber absorber progress is greatly shortened.