摘要
为分析差速器齿轮的疲劳寿命,运用动态有限元与试验相结合的方法,研究了锥齿轮在啮合过程中的应力分布以及疲劳强度。首先基于CATIA软件对差速器的半轴齿轮、行星齿轮进行了参数化建模,并采用动态有限元法模拟了齿轮副在最大扭矩工况下的动态接触;再根据有限元强度分析结果,将最大接触应力作为静载输入,运用疲劳分析软件对齿轮副的接触疲劳性能进行计算;最后进行了差速器齿轮副的台架试验,并将仿真结果与台架试验进行了对比。结果表明:齿面最大接触应力产生于节圆附近,齿轮间的最大接触应力为1309MPa;半轴齿轮在90%存活率下的疲劳寿命为3.394×106;仿真结果与台架试验具有较好的一致性,齿轮满足疲劳寿命要求。将动态有限元和疲劳寿命分析方法相结合可以有效预测差速器齿轮疲劳寿命。
To analyze the fatigue life of a differential gear, a method combined dynamic finite element and test is used to study the stress distribution of bevel gears in the meshing process and fatigue strength. CATIA commercial software is used to establish parameterized gear models. The maximum dynamic contact stress under maximum torque condition is 1309 MPa. The fatigue life of side gear at 90% survival rate is 3.394 × 106, which is based on the strength results and calculated in fatigue software. A bench test is also carried out to verify the fatigue strength, the calculation results have good consistency with the test results and side gear meet fatigue life criterion. It is demonstrated that the method of finite element and fatigue analysis could effectively predict the fatigue life of a differential gear.
出处
《应用力学学报》
CAS
CSCD
北大核心
2014年第4期595-600,10,共7页
Chinese Journal of Applied Mechanics
基金
江苏省科技支撑计划(BE2011164)
