基于接触理论的拉伸弹簧可靠性分析  

Reliability analysis of extension spring based on contact theory

作　　者：周勇[1] 周北岳[1] 李小松[1] 

机构地区：[1]湖南理工学院,岳阳414000

出　　处：《机械设计与制造》2009年第9期111-113,共3页Machinery Design & Manufacture

基　　金：湖南省自然科学基金项目(08JJ4012);湖南省科技计划项目(06FJ3142;2008GK3057);岳阳市科技计划项目(岳市财企指[2007]3号);湖南省科技计划项目(2008GK3057)

摘　　要：基于ANSYS商用有限元软件,建立了断路器拉伸弹簧的三维有限元模型,并对弹簧的刚度和冲击载荷作用下弹簧工作圈接触的应力分布进行了计算和分析。分析结果表明,对于拉伸弹簧,弹簧圈间的接触不仅使弹簧的最大应力比静态时的应力有所增大,而且在冲击过程中弹簧体内的等效应力随着簧丝间隙的不同而变化,因此在制造过程中应合理控制弹簧圈的间隙。最后,对SW6_110IW型拉伸保持弹簧在冲击载荷作用下的疲劳寿命进行了研究,数据表明如以静载荷模型模拟动载荷作用下的疲劳寿命,将会给弹簧可靠性预测带来较大的误差。The finite element model of the circuit-breaker spring actuators is created based on the ANSYS software. The stiffness and stresses distributions,which are induced by impacting loads,are investigated. Results show that the contact between the coils not only increases the maximum stresses but also affects the values of equivalence stresses in spring underlying different contact clearances, with this reason ,the gap of the coils should be controlled in the manufacturing process in order to improve the performance of the spring. At the end of the paper,the fatigue life of the spring under impacting load is also explored. The calculated data show that it would leads to large predicting errors in spring lifespan if the static model is used to analysis the spring undergoing impacting loads.

关 键 词：拉伸弹簧 有限元 ANSYS 接触 

分 类 号：TH16[机械工程—机械制造及自动化] O343[理学—固体力学]