| 基于虚拟样机技术的轻型载货汽车车架疲劳寿命预测方法 |
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| 引用本文： | 肖志金,朱思洪. 基于虚拟样机技术的轻型载货汽车车架疲劳寿命预测方法[J]. 机械设计, 2010, 27(1) |
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| 作者姓名： | 肖志金 朱思洪 |
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| 作者单位： | 南京农业大学,工学院,江苏南京210036 |
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| 基金项目： | 十一五国家科技攻关计划资助项目(2006BAD11A02) |
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| 摘 要： | 为准确预测随机动载作用下汽车车架结构的疲劳寿命,将有限元分析与多体动力学相结合。首先建立了车体结构的多体动力学模型,并将根据中国路况得出的仿真路面谱作为输入,计算了车体11个关键部位的载荷历程。然后在车体有限元模型中计算了相应的应力影响因子。同时根据车架材料的S-N曲线和车架本身的特点拟合出了车架结构的S-N曲线。最后,利用MSC-FATIGUE软件基于准静态应力法的疲劳寿命分析技术,预测了车架结构的疲劳寿命。所预测结构寿命在合理范围内,可以作为车架后续轻量化改进的依据。
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| 关 键 词： | 有限元方法 多体动力学 疲劳寿命 车架 路面谱 |
Prediction method of fatigue life-span of light-duty truck frame based on virtual prototype technology |
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| XIAO Zhi-jin,ZHU Si-hong. Prediction method of fatigue life-span of light-duty truck frame based on virtual prototype technology[J]. Journal of Machine Design, 2010, 27(1) |
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| Authors: | XIAO Zhi-jin ZHU Si-hong |
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| Affiliation: | College of Engineering/a>;Nanjing Agricultural University/a>;Nanjing 210036/a>;China |
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| Abstract: | For the sake of accurately predict the fatigue life-span of automobile frame structure under the action of random dynamic loads;let the finite element analysis and multi-body dynamics be combined together.Firstly the multi-body dynamics model of vehicle body structure was established,and let the simulative road surface spectrum obtained according to the Chinese road condition to be taken as the input so as to compute the loading courses of 11 key positions of vehicle body.After that the corresponding stress... |
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| Keywords: | finite element method multi-body dynamics fatigue life-span vehicle frame road surface spectrum |
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