关键词: 双拉杆；失效链；极限承载力；悬架总成

Abstract: In order to improve the bearing capacity of the rear suspension and match the development of the project model, this paper takes the double torsionbars of vehicle suspension as research objects, a calculating method for the dynamic load distribution coefficient is designed. Then the simulation of torsionbar and its surrounding parts ultimate bearing capacity is calculated according to the failure chain relationship, and the vehicle test experience is completed. The results show the simulation calculation of the failure area stay consistent with those of the experiment test, which confirmed the design and ultimate bearing capacity simulation analysis of the mounting system are accurate and effective in this method and can be used to provide reliable guidance for the subsequent vehicle double torsionbars design.

Key words: Double torsionbars; Failure chain relationship; Ultimate bearing capacity; Suspension assembly