关键词: 载荷谱；钢板弹簧；工况优化

Abstract: This paper takes the leaf spring of a light commercial vehicle as an example to carry out the optimization of the vehicle durability test procedure based on the load spectrum of the proving ground. The forward leaf spring mount that can represent the force of the leaf spring is selected as the road spectrum collection location. The load spectrum of the durability procedure of the proving ground is collected. Combined with the knowledge of fatigue theory and calculated by N-code software, the pseudo damage for each event is obtained. An acceleration load spectrum is generated with the goal of retaining 90% of the pseudo-damage equivalent of the original load spectrum, and then the durability procedure before and after optimization is analyzed and compared from the aspects of power spectral density, statistical value and rainflow count. The results show that significant acceleration can be achieved while retaining the characteristics of the original test specifications, and the test duration is shortened by 60%.

Key words: Load spectrum; Leaf spring; Optimization of durability procedure