基于LMS Virtual.lab水稻插秧机变速箱的动力学特性仿真

Simulation on dynamic characteristics of rice planter transmission based on LMS Virtual.lab

【目的】研究并改善水稻插秧机变速箱动力总成结构.【方法】结合虚拟样机与动态仿真技术,借助UG和LMS Virtual.lab软件,根据水稻插秧机变速器的拓扑结构及运动关系,建立关于变速箱的多体动力学仿真模型.通过对变速箱齿轮轴系及变速箱壳体的局部柔性化处理,分析了关于变速箱刚柔耦合的多体动力学特性;利用BDF算法获取了虚拟样机在各挡位下参与扭矩传递的仿真速度与理论值的拟合情况,齿轮系统啮合力的频谱特性以及各轴在各阶振动频率下的应力应变分布情况.【结果】在箱体结构设计时要注意,在壳体与壳体的连接部位和壳体与轴承的连接部位适当加强结构强度,同时在固定点位置以及壳体非连接部位可以适当降低结构强度以节省材料.【结论】成功实现水稻插秧机变速箱的动力学建模与仿真.

【Objective】To study and improve the rice planter transmission powertrain.【Method】The virtual prototyping and dynamic simulation technology was used to carry out simulation studies on spacing gearbox multi-body dynamic characteristics according to its topology structure and movement relations based on LMS Virtual.lab software.A multi-body dynamics rigid-flexible coupling simulation model was created by local flexible processing of gearbox shaft and gearbox housing in LMS Virtual.lab software.Fitting case of the simulation speed and theoretical value of virtual prototype participate in each gear torque transmission was acquired using BDF method,as well as the spectral characteristics of the gear system meshing force and the stress and strain distribution of the axis under each vibration frequency stage.【Result】In box structure design attention should be paid to connection parts between the shell and shell,the shell and bearing to properly strengthen the structure strength and the fixed position and disconnected part of shell can reduce the structural strength to save material appropriately.【Conclusion】Dynamics modeling and simulation of rice planter transmission powertrain were implemented successfully.