箱体结构柔性对变速箱动态特性的影响分析

Analysis Influence of Flexibility of Box Structure on the Dynamic Characteristic of Transmission

基于多体动力学理论,分析了箱体受载后产生的柔性变形对变速箱动态特性的影响。首先,通过提取箱体刚度矩阵、质量矩阵和节点位置信息,并将其与传动部件虚拟装配,建立了变速箱动态分析模型。其次,依据弹性力学理论,对因箱体柔性变形并考虑其它零部件受载变形导致的齿轮副啮合错位、传递误差、动态啮合力进行了量化分析。最后,针对箱体受载变形引起的变速箱动态载荷,提出了改善变速箱结构的具体措施。以上分析结果可为改善变速箱动态性能提供借鉴。

Based on the theory of multi body dynamics,the dynamic characteristic of transmission was analyzed in this paper when the box was flexibly deformed under load. First,the stiffness matrix 、mass matrix and node positions of transmission box were extracted and combined with driving part to assemble virtually,the transmission dynamic analysis model was built. Then,the misalignment、transmission error、dynamic mesh forces of the meshing gear pair due to the deformation under load on box and other parts were numerically analyzed,which is based on the elastic-mechanics theory. Finally,in viewof the transmission dynamic load resulted from the box deformation under load,the method was proposed to improve the box structure.All above analysis results provide references for improving the dynamic performance of transmission.