关键词: 汽车后纵臂；力学性能；ABAQUS；后纵臂强度；耐久性

Abstract: In order to verify the various mechanical properties of the rear longitudinal arm structural components of automobile, the finite element model of the rear longitudinal arm is established in this paper, and the load limit measured in the road test is used for loading, strength analysis, modal analysis and fatigue life analysis. At the same time, the structure and process optimization of the rear longitudinal arm are carried out in view of the insufficient strength and durability of the rear longitudinal arm in the analysis results. The simulation results before and after optimization show that the improved measures can meet the design requirements of the strength and durability of the rear longitudinal arm members, and through the physical bench verification, it provides a more comprehensive thinking and method for the analysis and solution of similar problems.

Key words: Automobile rear longitudinal arm; Mechanical performance; ABAQUS; Rear longitudinal arm strength; Durability