Multi-body Dynamics Simulation Analysis Of Drive Axle Of Wheel Loader

As a key structure of wheel loader's transmission system, precisely analysis of load and dynamic response of the drive axle is the basic of its dynamic characteristics prediction and low-noise design. An important way to fundamentally improve the transmission capability, shorten development cycles, and improve product competitiveness is to accurate forecast the dynamic performance of drive axle by virtual prototyping technology.This paper studies the drive axle of wheel loads, and expounded the structural characteristics and working principle of the various components of the drive axle. A detail solid model of the parts of the drive axle is formed and assembled using UG commercial software. The parametric modeling method of straight-tooth bevel gear has been studied. Consider the flexible effects of the axle housing and shaft, carry out the modal analysis of it. Thereby we formed a rigid-flexible coupling multi-body dynamic simulation model and conduct simulation analysis of kinematics and dynamics. Driving axle driveline gears meshing force and dynamic load amplitude were obtained, the simulation results are consistent with the theoretical value. Analysis the flexible effects of shaft to the dynamic response of the system. The results show that increasing the torque transmission of shaft, the effect of the flexible is more obvious.Loader's work condition is very hard. This paper analyzed the drive axle under pulse load which is caused by a rough road when the loader ran on it. A simulation model of the drive axle under pulse load was developed. The dynamic properties of the drive axle were obtained from a dynamic analysis via ADAMS. Load history file was used in the Transient Dynamic Analysis of the axle housing via ANSYS, and dynamic responses such as stress and strain were obtained. Dynamic security of the axle housing was also studied.The study showed that multi-body dynamic simulation which considering the flexible effects of key parts is an effective way to study the dynamic properties of transaxle. The dynamic response of the drive axle we obtained can be used as a basic data in strength analysis and fatigue life prediction of corresponding parts. Dynamic analysis also is groundwork of optimization design of drive axle.