关键词: 可靠性试验, 汽车, 强化系数

Abstract: A kind of truck as the researched object, mensurated the front axle’s fatigue characteristic curve, and it’s load-time history when truck is running on the proving ground enhancement roads, mountainous roads and tar-paved roads, obtained the distributing function of loads by means of rain-flow counting met-hod and statistical theory. According to the fatigue characteristic curve and routine loads spectrums of each roads, calculated the front axle’s fatigue life respectively, taking advantage of amended Miner linear accumulated fatigue damage theory, obtained the enhancement coefficients of each roads by comparative norm of tar-paved roads. Provided an important foundation for precisely evaluating automotive reliability and establishing a reasonable principle of automotive reliability enhancement test.

Key words: Automobile, Enhancement coefficient, Reliability test