关键词: 道路载荷谱；副水箱支架；振动试验；损伤等效；冲击响应谱；PSD

Abstract: Aiming at the bracket auxiliary water tank of a vehicle type cracked during the vehicle road durability test, collect the road load spectrum of the bracket for auxiliary water tank, then calculate the total damage of the road test and synthesize the appropriate acceleration rig test drive power spectral density (PSD) based on the fatigue damage equivalence principle. The original status component which broken during the road durability test is verified by the vibration test with this PSD; the original state sample performs vibration test verification according to the PSD, the failure mode and time of the sample are consistent with the vehicle road test results, and the PSD is used to verify the accelerated vibration test of the optimized sample. The optimized sample also passes the vehicle road test certificate, which saves the road test certificate time for the development of the sample vehicle.

Key words: Road load spectrum; Bracket auxiliary water tank; Vibration test; Damage equivalence; Shock response spectrum; PSD