ABSTRACT
The present work investigates the dynamical behavior of gearbox housing under the condition of the wheel out of roundness (OOR). A dynamic model of vehicle-track coupling dynamics was developed with the consideration of gear transmission, polygonal wheel and track irregularity. Then, the boundary conditions obtained from the kinetic model are applied to the finite element model of the gearbox housing. Furthermore, the dynamic characteristics of the gearbox housing are calculated by the finite element model. At the same time, the related rig test is carried out. The results show that eccentric wheel leads to a sharp increase in gearbox housing stress and the simulation is in agreement with the experimental results. Furthermore, the simulation results show that the maximum stress of gearbox housing is more than 127 Mpa when the twentieth order OOR occurs. Through analysis, the stress larger parts of gearbox housing is coincident with the often cracked parts, which indicates that the wheel out of roundness will aggravate the gearbox housing cracking.
