关键词: 悬架系统；载荷谱；伪损伤值；耐久性试验

Abstract: At present, most of the bench fatigue test equipment of suspension system in automobile factory can realize multi-axial loading and variable frequency loading, so the input cost of test equipment is high. This paper studies and explores a road spectrum based bench fatigue test method for automobile suspension. The characteristic of this method is to decompose the collected road spectrum load into multiple test loads by using the pseudo-damage equivalent principle. The test loads are all fixed amplitude, fixed frequency and uniaxial, so the requirements for test equipment are not high, and the test accuracy can be achieved. The test results show that the bench fatigue test conducted by this method can get the same test results as the whole vehicle durability test.

Key words: Suspension system; Load spectrum; False damage value; Durability test