Abstract
In order to solve the problem happened in the market that the high voltage cable of an electric operation vehicle fails and contacts the conductive terminal and the vehicle cannot be started. Failure that occur in market was reconstructed immediately in PSD fatigue bench test, whose input is based on the input of vibration spectrum converted from acceleration signal collected from the user’s public road, in combination with pseudo damage equivalent technique, shock response spectrum and fatigue damage spectrum method. By analyzing the failure mechanism of high-voltage cable fault, the scheme of improved cable joint structure and optimizing cable layout is carried out and verified by bench test. No such problem occurs after the improved structure is put on the market. Within the requirement of identical failure mode and equivalent damage value, the correlation between vehicle users and bench vibration durability test is realized, which greatly shortens the verification period and provides an effective method for the subsequent development and verification of high-voltage cable durability.