关键词: 轻卡车架；性能优化；结构强度

Abstract: In this paper, the causes of the local strength problem of a light truck frame during the reinforced road test certificate are analyzed, and the stress, strain and acceleration of the real vehicle in the test field are tested. It is determined that the torque attenuation and loosening of the container U-bolt is the main cause of the problem, resulting in a sharp mutation in the local stress of the frame and the phenomenon of stress concentration, the topology optimization design is carried out, and the strength performance optimization design of the frame structure was verified by CAE analysis. On the premise of ensuring the improvement of the mechanical properties of the frame, the lightweight goal is realized simultaneously, and the economic benefit is remarkable.

Key words: Light truck frame; Performance optimization; Structural strength