汽车工程 ›› 2023, Vol. 45 ›› Issue (11): 2175-2186.doi: 10.19562/j.chinasae.qcgc.2023.11.019

所属专题: 车身设计&轻量化&安全专题2023年

• • 上一篇    

基于薄板承载特性的车身接头结构设计方法

王超1,于万元2,成艾国1,何智成1()   

  1. 1.湖南大学,汽车车身先进设计制造国家重点实验室,长沙 410082
    2.柳州职业技术学院,柳州 545001
  • 收稿日期:2023-02-26 修回日期:2023-04-06 出版日期:2023-11-25 发布日期:2023-11-27
  • 通讯作者: 何智成 E-mail:hezhicheng815@163.com
  • 基金资助:
    国家重点研发计划(2020YFA0710904-03);国家自然科学基金联合基金(U20A20285)

Design Method for Vehicle Body Joints Based on Load-Bearing Characteristics of Thin Plates

Chao Wang1,Wanyuan Yu2,Aiguo Cheng1,Zhicheng He1()   

  1. 1.Hunan University,State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Changsha  410082
    2.Liuzhou Vocational & Technical College,Liuzhou  545001
  • Received:2023-02-26 Revised:2023-04-06 Online:2023-11-25 Published:2023-11-27
  • Contact: Zhicheng He E-mail:hezhicheng815@163.com

摘要:

接头作为白车身框架的关键结构,合理的接头设计对白车身承载能力的提升具有重要意义。本文以B柱下接头为研究对象,提出了基于薄板承载特性的车身接头通用结构设计方法。首先阐述了薄板结构的载荷类型、传力方式和承载特性,为后续的通用接头结构提供理论基础;其次通过灵敏度分析识别了接头载荷条件,用于分析接头的薄板承载特性;然后建立了T型接头薄板的设计规则,并归纳了接头通用结构设计。应用实例与试验表明:接头刚度和车身扭转刚度分别提升35%和8.5%,质量仅增加0.16%。该方法可以快速、有效地改进接头结构设计,提升车身刚度性能。

关键词: 薄板, 承载特性, 灵敏度分析, 接头通用结构

Abstract:

As a key structure of the Body-in-White (BIW), a reasonable joint design is of great significance for the improvement of the load-bearing capacity of the BIW. Taking the lower joint of the B pillar as the research object, a universal structure design method for body joints based on the load-bearing characteristics of thin plates is proposed in this paper. Firstly, the load type, force transmission mode and load-bearing characteristics of the thin plate structure are described to provide a theoretical basis for the subsequent universal joint structure. Secondly, the load conditions of joints are identified through sensitivity analysis, which is used to analyze the load-bearing characteristics of the thin plate of the joint. Then the design rules for the thin plate of T-joints are established and the universal structure design of the joint is summarized. Application examples and tests show that the joint stiffness and BIW torsional stiffness is increased by 35% and 8.5% respectively, while the weight is only increased by 0.16%. The method can quickly and effectively improve joint structure design and enhance body stiffness.

Key words: thin plate, load-bearing characteristics, sensitivity analysis, universal joint structure