| 基于频率响应分析的越野车车架疲劳寿命预估 |
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| 引用本文： | 阚萍,李源源,吴道俊,钱立军.基于频率响应分析的越野车车架疲劳寿命预估[J].车辆与动力技术,2011(2):9-13. |
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| 作者姓名： | 阚萍 李源源 吴道俊 钱立军 |
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| 作者单位： | 安徽交通职业技术学院;合肥工业大学; |
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| 摘 要： | 以某越野车车架为研究对象,对车架有限元模型在MSC.Nastran中进行频率响应分析,以获得输入和结构应力之间的传递函数;以车架为柔性体在ADAMS中建立整车刚柔耦合动力学模型,得到相应的载荷时间历程;综合有限元分析获得的频率响应结果和由以上随机载荷时间历程数据所转换得到的功率谱密度,进行基于频域的车架疲劳寿命预估,分析结果与实际道路试验情况相符,证明该分析方法可以在产品设计阶段准确、高效地预估车体结构疲劳寿命.
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| 关 键 词： | 车架 疲劳寿命 频率响应分析 有限元 |
Fatigue Life Prediction of SUV Frame Based on Frequency Response Analysis |
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| KAN Ping,LI Yuan-yuan,WU Dao-jun,QIAN Li-jun.Fatigue Life Prediction of SUV Frame Based on Frequency Response Analysis[J].Vehicle & Power Technology,2011(2):9-13. |
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| Authors: | KAN Ping LI Yuan-yuan WU Dao-jun QIAN Li-jun |
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| Affiliation: | KAN Ping,LI Yuan-yuan,WU Dao-jun,QIAN Li-jun(1.Anhui Communication Vocational&Technical College,Heifei 230051,China,2.Hefei University of Technology,Hefei 230009,China) |
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| Abstract: | Taking a SUV frame as a research object,by means of frequency response analysis with software MSC Nastrain,the transfer functions between input and structural stress are obtained in the frame finite element model.A rigid-flexible coupling vehicle model with flexible frame components was built,and the loading time histories are calculated at the same time.The frame fatigue life was predicted in Frequency Domain according to the results of frequency response analysis and the Power Spectral Density transformed... |
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| Keywords: | frame fatigue life frequency response analysis method finite element method |
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