关键词: 纯电动商用车；车身骨架；强度特性；数值分析

Abstract: The strength of the body skeleton has an important impact on vehicle design reliability and cruise safety. This paper uses HyperMesh software to conduct a numerical analysis of the strength characteristics of a pure electric commercial vehicle body skeleton. Through the software, a finite element model of the body skeleton based on shell elements is established, and the stress distribution of the commercial vehicle body skeleton under bending, torsion, braking, and turning conditions is calculated to determine whether there is local stress concentration in the skeleton and whether the structural fatigue limit is met. According to the calculation results, the model is optimized. The calculation results again show that the strength of the skeleton structure is within the yield limit of the material, and the overall stress margin is large, meeting the performance requirements. Numerical research provides technical support for vehicle design and optimization.

Key words: Pure electric commercial vehicle; Body frame; Strength characteristics; Numerical analysis