关键词: 液压油箱支架；焊缝开裂；刚强度分析

Abstract: The root weld of a hydraulic tank of a heavy special vehicle is cracked, which seriously affects the driving safety of the vehicle. In order to find out the cause of weld cracking of the bracket, the finite element method is used to analyze the stiffness and strength of the bracket under three typical working conditions. The results show that there is a great risk in the stiffness and strength of the bracket under three working conditions. Improving the design of bracket structure changes the bracket structure shape, material and plate thickness. The simulation results show that the stiffness and strength of the bracket structure are greatly improved after the improvement. Through the structural improvement design, the stress and deformation of the bracket are improved to avoid the risk of insufficient strength caused by the limitation of structural design, which has a good guiding significance for engineering design.

Key words: Hydraulic tank bracket; Weld cracking; Stiffness and strength analysis