ANALYSIS OF DURABLE CRACKING AND STRUCTURE OPTIMIZATION OF REAR SUB-FRAME

ZHOU DeSheng; WU YiDong; HU HaoJu; WANG ZhenFeng

doi:10.16579/j.issn.1001.9669.2021.06.035

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ANALYSIS OF DURABLE CRACKING AND STRUCTURE OPTIMIZATION OF REAR SUB-FRAME

更新时间：2022-09-22

- ANALYSIS OF DURABLE CRACKING AND STRUCTURE OPTIMIZATION OF REAR SUB-FRAME
- Journal of Mechanical Strength Vol. 43, Issue 6, Pages: 1510-1514(2021)
- 作者机构：
  
  1. 广州汽车集团股份有限公司汽车工程研究院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2021.06.035
  CLC：
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ZHOU DeSheng, WU YiDong, HU HaoJu, et al. ANALYSIS OF DURABLE CRACKING AND STRUCTURE OPTIMIZATION OF REAR SUB-FRAME. [J]. 43(6):1510-1514(2021)
DOI：

ZHOU DeSheng, WU YiDong, HU HaoJu, et al. ANALYSIS OF DURABLE CRACKING AND STRUCTURE OPTIMIZATION OF REAR SUB-FRAME. [J]. 43(6):1510-1514(2021) DOI： 10.16579/j.issn.1001.9669.2021.06.035.

摘要

为了提升后副车架结构的耐久性能,进行了台架耐久试验,针对试验中发生开裂现象进行了焊缝性能分析,结果表明非焊缝疲劳引起开裂。通过台架耐久仿真分析找到原结构的危险区域,并提出三种优化方案,对比各方案的性能要求,采用双边满焊为最佳改进方案。改进后的结构满足副车架台架耐久、整车二十四通道和四立柱耐久试验,也表明仿真分析方法和改进方案是可信的。

Abstract

In order to improve the durability of the rear sub-frame structure, a bench endurance test was carried out. Weld performance analysis was carried out for cracking in the test, the results showed that non-weld fatigue caused cracking. Through the endurance simulation analysis of the bench, the dangerous area of the original structure was found, and three optimization schemes was proposed. The performance requirements of each scheme are compared, and bilateral full welding is the best improvement scheme. The improved structure satisfies the durability test of the sub-frame bench, the endurance test of the vehicle’s twenty-four channels and four columns, and also shows that the simulation analysis method and improvement scheme are credible.

关键词

后副车架耐久性能台架试验有限元分析优化方案

Keywords

Rear sub-frameDurabilityBench testFinite element analysisOptimization scheme

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