Beam Layout Optimization for Vehicle Body Stiffness

摘要

In this paper we research the beam layout optimization to strengthen the stiffness of a tracked vehicle' body. Based on CAD models of vehicle parts, a rigid-flexible coupling virtual prototype of the vehicle is constructed through body finite element meshing and modal analysis. The multi-body system dynamics simulation is conducted under several typical driving conditions. Loads acting on the vehicle body at several typical moments are exported and then imposed on the body finite element model to carry out the static analysis, such that the multi-load steps topology optimization for the hull is achieved. On the basis of the optimization results the local beam layout is modified and the vehicle virtual prototype is reconstructed. By re-executing the dynamics simulation, the change of the stress and deformation are compared. The simulation result shows the strength and stiffness of the body are improved. So the proposed scheme is effective for the body stiffness and could provide references for similar structural optimization problems.