随机载荷下轴结构疲劳寿命分析  

Fatigue Life Prediction of Shaft under Random Loadings

作　　者：吕文阁[1] 谢庆华[1] 袁清珂[1] 骆少明[1] 张湘伟[1] 

机构地区：[1]广东工业大学机电工程学院,广东广州510090

出　　处：《机床与液压》2009年第5期196-197,共2页Machine Tool & Hydraulics

基　　金：广东省自然科学基金项目(07001748)

摘　　要：应用功率谱密度法对随机载荷作用下轴结构进行疲劳寿命分析,给出了基于功率谱密度法的疲劳寿命计算公式。使用有限元软件COSMOSWorks,以一个单级斜齿齿轮减速器低速轴的疲劳寿命计算为例进行了验证。结果表明,按照传统的静强度方法设计的轴结构在疲劳强度上是不足的。The fatigue life of shaft under random loadings was estimated based on power spectrum density method. A formula of fatigue life by power spectrum density method was obtained. The fatigue life of low velocity shaft in a single cylindrical helical gear reducer was used as example to verify the method presented by means of finite elements method software COSMOSWorks. The result shows that traditional design method based on static strength for shaft is deficient in fatigue strength.

关 键 词：随机载荷 功率谱密度 齿轮减速器 轴 疲劳寿命 

分 类 号：O346[理学—固体力学]