以一款紧凑型轿车扭转梁后桥为对象，结合其在试车场试验时失效模式，通过对试车场路况下后桥服役载荷的损伤分析和信号压缩，编制了后桥耐久性快速试验载荷谱。同时结合以往研究成果中失效关联载荷的识别，制定了该后桥耐久性快速试验方案，并通过台架试验进行验证。结果显示，所制定的仅通过垂向加载的后桥耐久性快速试验，可以准确地复现后桥在试车场路况下的失效模式，并且实现了3．9倍的加速。这一方法可以推广至其他汽车零／部件耐久性快速试验规范的编制，对准确地验证整车及零／部件耐久性里程具有一定的参考价值。%Taking the torsion beam rear axle from a compact car was taken as an objective ,the load spectrum for accelerated dura-bility test was developed based on the failure mode on proving ground ,by means of damage analysis and signal condensing .And fatigue tests were conducted under the failure-correlated loads to verify the validity of the proposed testing program of rear axle . Results show that the proposed accelerated durability tests under vertical forces can reproduce the failure mode of rear axle on the road conditions of proving ground ,and a acceleration factor of 3.9 was achieved by comparing the test time of test rig and proving ground.This method could be helpful to the development of accelerated durability test procedures .
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