基于模态应变能及灵敏度分析白车身模态优化

胡小舟; 林建平; 陈龑; 胡巧声

doi:10.13433/j.cnki.1003-8728.2015.0920

基于模态应变能及灵敏度分析白车身模态优化

doi: 10.13433/j.cnki.1003-8728.2015.0920

1.
同济大学机械与能源工程学院, 上海 201804;
2.
南京依维柯汽车有限公司, 南京 210028

详细信息

作者简介:
胡小舟（1988-），硕士研究生，研究方向为汽车NVH性能及车身轻量化技术，xiao-12013@163.com

通讯作者:
林建平，教授，博士生导师，jplin58@tongji.edu.cn

计量
- 文章访问数: 157
- HTML全文浏览量: 23
- PDF下载量: 14
- 被引次数: 0
出版历程
- 收稿日期: 2013-09-03
- 刊出日期: 2015-09-05

Modal Optimization of Body-in-White Based on Modal Strain Energy and Sensitivity Analysis

1.
School of Mechanical Engineering, Tongji University, Shanghai 201804, China;
2.
Nanjing IVECO Motors Co., Ltd., Nanjing 210028, China

摘要

摘要: 白车身优化过程中，由于板件较多，直接使用模态灵敏度分析的分析对象多且计算量大。本文引入模态应变能分析方法，从而减少模态灵敏度分析对象，提高优化效率。基于模态试验验证的有限元模型，选取模态应变能分析的一阶模态振型下的薄弱位置，缩小模态灵敏度分析的板件范围，再根据灵敏度分析结果对板件厚度进行调整，提高白车身一阶模态频率。最终结果表明，优化后一阶模态频率由15.75 Hz提高到了16.50 Hz，同时白车身质量未增加，实现了白车身模态性能提升的同时车身不增重。
- 白车身 /
- 模态应变能 /
- 灵敏度分析 /
- 模态优化
Abstract: In optimization of body-in-white, a large amount of panels will increase the modal sensitivity analysis objects and computation. So with the modal strain energy analysis, the optimizing efficiency will be increased. Based on the finite element analysis model verified with modal experiment, the large deformation parts of body-in-white and the sensitivities of these parts are defined in modal strain energy analysis and sensitivity analysis. According to the sensitivity analysis results, we improve the first modal frequency with adjusting the thickness of the parts. The final results show that after optimization, the first modal frequency is raised from 15.75 Hz to 16.50 Hz, without weight increase of the body-in-white.
- body-in-white /
- calculations /
- computer simulation /
- computer software

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参考文献(15)

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