一种橡胶结构的缓冲制动吸能有限元分析

Finite Element Analysis of Buffer Brake Energy Absorption of a Kind of Rubber Structure

某水缸动力装置中,活塞运动末程冲击振动较大,因此对原有缓冲结构进行改进,并提出了使用紫铜垫与橡胶组合的缓冲制动吸能机构的改进方案。以Mooney-Rivlin模型为基础,建立了接触式的橡胶有限元三维模型,对比了不同橡胶高度下的橡胶应力、形变及接触反力情况,建立了以功为主指标的评价体系。通过与原有结构的缓冲效果进行对比,证明了采用紫铜垫与橡胶组合的缓冲制动吸能结构的有效性。

In a water cylinder power plant,the impact vibration at the end of piston movement is large.The original buffer structure is thus improved,and an improved scheme of the buffer brake energy absorbing mechanism using a combination of a copper cushion and a rubber cushion is proposed.Based on the Mooney-Rivlin model,a three-dimensional contact finite element model of rubber is established.The rubber stress,deformation and contact reaction force of rubber under different thickness and shape are compared.An index evaluation system based on work is established.By comparing with the buffering effect of the original structure,the effectiveness of the buffer brake energy absorbing structure combined with copper cushion and rubber cushion is proved.