摘要
建立磨减速机输入弧齿锥齿轮副的三维接触有限元模型,借助LS-DYNA软件对锥齿轮副柔性体动力学进行仿真分析,得到锥齿轮副的瞬态接触力,以此为疲劳寿命分析的载荷谱,结合静载作用下的应力结果和锥齿轮副材料S-N曲线,在FE-SAFE中采用最大主应力算法对锥齿轮副进行疲劳寿命分析,并研究了应力集中系数、载荷和残余应力对锥齿轮副疲劳寿命的影响规律。研究结果表明,锥齿轮副寿命随应力集中系数和载荷的增加而减小,疲劳寿命对载荷较敏感;残余拉应力使锥齿轮副的疲劳寿命降低,而残余压应力使锥齿轮副的疲劳寿命提高。
The 3Dcontact finite element model of the input spiral bevel gear pair of vertical mill reducer is built,the flexible-body dynamics simulation analysis of bevel gear pair is carried out by using the LS-DYNA software,and the transient contact force is obtained,the fatigue life of the bevel gear pair is performed by using maximum main stress algorithm in FE-SAFE based on fatigue load spectrum,the S-N curve of the bevel gear pair and stress results of the bevel gear pair under static load.Then,the influence of stress concentration,loads and residual stress on fatigue life of bevel gear pair are studied based on the results above.The results indicate that the life decreases of bevel gear pair with the increase of stress concentration and loads,the fatigue life shows sensitization to loads,the residual tensile stress leads to a reduction of bevel gear pair fatigue life,however,the residual press stress leads to a increase of bevel gear pair fatigue life.
出处
《机械传动》
CSCD
北大核心
2014年第11期41-44,87,共5页
Journal of Mechanical Transmission
关键词
弧齿锥齿轮副
动力性能
载荷谱
疲劳特性
Spiral bevel gear pair
Dynamic performance
Load spectrum
Fatigue property
