汽车驱动桥准双曲面齿轮齿根弯曲应力预测与试验

发布时间：2019-01-04 09:23

【摘要】：有限元法是预测汽车驱动桥准双曲面齿轮齿根弯曲应力的重要方法,但单独准双曲面齿轮有限元模型约束条件难以确定,为此本文建立了基于整体驱动模型准双曲面齿轮齿根弯曲应力有限元分析模型,并对齿根应力仿真结果与台架试验进行了对比。选用ABAQUS/Standard建立了驱动桥准双曲面齿轮静态啮合模型,仿真结果表明:本文研究的整体驱动桥准双曲面齿轮在啮合过程中小齿轮齿根弯曲应力在靠近大端出现最大值,齿根部位先受到压应力,再受到拉应力;大齿轮齿根弯曲应力在靠近小端出现最大值,齿根部位先受到拉应力,再受到压应力。最后,搭建了驱动桥静扭试验台,并对驱动桥大齿轮齿根弯曲应力进行测量,将台架试验与仿真结果进行了对比分析,对比结果表明,所建立的有限元模型准确可靠,可将此建模方法应用于类似的齿轮齿根弯曲应力分析。
[Abstract]:Finite element method (FEM) is an important method to predict the bending stress of hypoid gear root of automobile drive axle, but it is difficult to determine the constraint condition of the finite element model of hyperboloid gear alone. In this paper, a finite element analysis model of tooth root bending stress of hypoid gear based on global driving model is established, and the simulation results of tooth root stress are compared with that of bench test. The static meshing model of hypoid gear of drive axle is established by using ABAQUS/Standard. The simulation results show that the bending stress of the root of the pinion gear appears to be the maximum near the large end during the meshing process of the hypoid gear of the drive axle studied in this paper. The root of the tooth is subjected to compressive stress and then tensile stress. The bending stress of tooth root of big gear appears maximum near the small end, the root of tooth is subjected to tensile stress first and then compressive stress. Finally, the static torsion test rig of the drive axle is built, and the bending stress of the tooth root of the drive axle large gear is measured. The results of bench test and simulation are compared and analyzed. The comparison results show that the finite element model is accurate and reliable. This modeling method can be applied to the bending stress analysis of gear root.
【作者单位】：吉林大学汽车仿真与控制国家重点试验室;南京依维柯汽车有限公司车桥分公司;
【基金】：国家自然科学基金项目(51205158) 中国博士后科学基金项目(2013M541294)
【分类号】：TH132.41

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