Abstract
The battery frame stent structure is a significant part for a commercial vehicle, which often suffers from fatigue damage. In order to solve this problem, the principle of structural vibration fatigue analysis is discussed and the vibration fatigue of the battery frame stent structure is studied in this paper. Prompting acceleration of the stent and strain time history of the dangerous points are obtained by carrying out the load collection test under specific road conditions. Through the analysis of the strain at the dangerous points, the maximum stress and weak parts are obtained, which provides a reference for the fatigue life analysis. The fatigue damage distribution of stent is got out by carrying out stent vibration fatigue analysis based on Dirlik model and acquired prompting acceleration PSD spectrum. After user feedback, the predicted position and life are more consistent with the actual situation.
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