汽车螺纹联接件预紧力的优化设计  

Optimized Design of Preload for Tread Connection of Automobile

作　　者：章伊华[1] 侯培海[1] 杨国玉[1] 

机构地区：[1]宁波大红鹰学院汽车CAE应用技术研究所,宁波315715

出　　处：《东北林业大学学报》2012年第11期151-154,共4页Journal of Northeast Forestry University

基　　金：浙江省自然科学基金项目资助(LY12E05012)

摘　　要：借助有限元数值模拟方法,将三维螺旋螺纹结构简化成二维轴对称问题,并对螺纹接触区域单元进行局部细化,以求得更加准确的应力状态。研究出应力随外力与预紧力的变化规律,找出在一定预紧力作用下最大应力随外力的变化曲线,得出螺纹联接设计中的最佳预紧力,为螺纹联接结构的工程设计及校核提供可靠的依据。Finite dement analysis was applied to simplify the three-dimensional thread connection into two-dimensional axisymmetric problem. Therefore, local fine mesh in the stress concentration area can be achieved in order to obtain more accurate stress. By changing preloads, the relative curves of the maximum stress on the thread and external force were summarized and analyzed. The optimized prdoad was obtained.

关 键 词：螺纹联接 有限元分析 预紧力 屈服极限 

分 类 号：U463[机械工程—车辆工程]