Actual Road Load Spectrum Acquisition and Motorcycle FrameFatigue Simulation Analysis
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摘要: 摩托车车架的疲劳性能决定着摩托车整车所能达到的最大服务寿命,影响着摩托车行驶安全性。为此,较为完整的摩托车虚拟耐久性分析过程被引入。本文在完成实际道路载荷谱采集工作的基础上,利用搭建的摩托车多体动力学模型,将等效后的道路载荷谱通过虚拟迭代再现;对摩托车车架应用准静态叠加法进行了疲劳仿真分析。结果表明:摩托车多体动力学模型精度较高,车架疲劳薄弱位置预测合理,摩托车虚拟耐久性分析过程基本满足工程应用需求。Abstract: Fatigue performance of the motorcycle frame determines the maximum service life that a motorcycle can achieve and affects the driving safety of the motorcycle. Based on this, a relatively complete virtual analysis process of motorcycle durability tests is investigated. After completing the acquisition of the load spectrum of the actual road, a multi-body dynamics model of the motorcycle is created and the load spectrum of the equivalent road is reproduced by virtual iteration. Finally, the fatigue simulation of the motorcycle frame is performed with quasi-static superposition method. The results show that the multi-body dynamics model of the motorcycle has high accuracy, the strength weak position of the frame is reasonably predicted, and the virtual durability analysis process of the motorcycle basically meets the needs of engineering applications
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Key words:
- motorcycle frame /
- multi-body dynamics /
- virtual iteration /
- fatigue simulation
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表 1 整车重量对比(去除轮胎)
参数 总重量 前轴 后轴 实测值/N 1821.82 839.86 981.96 仿真值/N 1821.87 877.91 943.96 差值/N −0.05 −38.05 38.00 百分比/% 0.003 4.53 3.87 -
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