铁路钢轨钢材应力强度因子的有限元计算方法  

FEA calculation method of stress intensity factor of rails steel

作　　者：王元清[1] 冯宝锐[1] 石永久[1] 

机构地区：[1]清华大学土木工程系清华大学结构工程与振动教育部重点实验室,北京100084

出　　处：《铁道科学与工程学报》2009年第1期1-5,共5页Journal of Railway Science and Engineering

基　　金：国家自然科学基金资助项目(5077810250078029);铁道部-清华大学科技研究基金资助项目(T2000410)

摘　　要：对采用普通单元和奇异单元的网格计算应力和位移进行分析,对网格的疏密程度以及奇异单元尺寸和围绕裂纹尖端的奇异单元数目对奇异单元法计算精度的影响进行系统分析,得出各种情况下的计算误差随着相关因素的变化规律,并从精度和效率的角度给出了建议。The analysis were made on stresses and displacements by standard elements and singularity elements. The calculations were also made to study the influences of the mesh spacing and singulari ty element numbers and sizes around the crack points on calculation precision. Methods were recommended based on the rules of errors varying with relative factors.

关 键 词：应力强度因子 位移 应力 奇异单元 网格尺寸 误差 

分 类 号：U213.4[交通运输工程—道路与铁道工程]