一种封闭式扭力梁异响问题的诊断与排除

Diagnosis and Elimination of Abnormal Sound of a Closed Torsion Beam

在汽车底盘零部件轻量化设计过程中,封闭式扭力梁得到了越来越广泛的应用,在封闭式扭力梁降低产品重量、提升产品性能的同时,异响问题也随之而来。本文以某封闭式扭力梁为例,通过台架验证、CAE仿真分析,对封闭梁异响问题的来源、规避等问题进行验证。验证结果表明,规避封闭梁异响问题,设计上从横梁内外层之间的摩擦方向进行考虑,比如横梁内外层之间保证零间隙、横梁两端打凸包;工艺上可考虑横梁内腔注油等。

In the process of lightweight design of automotive chassis components,closed torsion beams have been more and more widely used.Closed torsion beams reduce product weight and improve product performance at the same time,abnormal noise problems also follow.This paper takes a closed torsion beam as an example,through bench verification and CAE simulation analysis,The source and circumvention of the abnormal sound problem of the closed beam are verified.The results show that the friction direction between the inner and outer layers of the beam is considered in the design to avoid the abnormal sound of the closed beam,such as zero clearance between the inner and outer layers of the beam,and the convex hull at both ends of the beam;In the process,oil injection in the inner cavity of the beam can be considered.