摘 要：为实现某乘用车扭力梁轻量化目标，本文将其横梁的原开口截面改变为封闭截面，并建立和验证其有限元模型，综合考虑质量、刚度、强度等约束，对改为封闭截面的横梁进行初始设计和尺寸优化。最终实现扭力梁减重13.95%,取得较好的轻量化效果。
关键词：扭力梁；横梁轻量化；有限元；尺寸优化
中图分类号：U463.33 文献标志码：A DOI：10.15917/j.cnki.1006-3331.2025.01.008
Lightweight Design of Passenger Car Torsion Beam Based on Improved Crossbeam Structure
ZHOU Wei,HUANG Taishuo,ZHANG Xun
Abstract: To achieve the lightweight goal of a passenger car torsion beam,this paper changes the original open section of its crossbeam to a closed section,establishes and verifies the torsion beam finite element model, and comprehensively considers constraints such as weight, stiffness, and strength to do the initial design and size optimization for the improved closed-section cross beam.Finally, the torsion beam weight reduction of 13.95%and better lightweight effect are realized.
Key words: torsion beam; lightweight of crossbeam; finite element; size optimization
