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车身疲劳开裂问题的分析与优化须以准确的受力输入为前提,针对用户目标路面进行的实际道路试验,是获取有效载荷谱最有效直接的方法。结合整车构造的受力状况和CAE车身分析输入需求,选择合适的测试安装硬点并对其进行加速度响应测量,同时对车身关键开裂点进行应变信号测量,以对CAE分析结果进行有效性验证。将测量得到的信号,通过Labview/Matlab联合处理,为车身结构的CAE分析与优化提供数据输入和结论验证。
The analysis and optimization of the fatigue crack problem of the body should be based on the premise of accurate force input. The actual road test for the target road surface of the user is the most effective and direct method for obtaining the spectrum of the payload. According to the force condition of the vehicle structure and the input demand of CAE body analysis, the appropriate test installation hard point is selected and its acceleration response measurement is carried out. At the same time, the strain signal of the critical crack point of the vehicle body is measured to validate the CAE analysis result . The measured signals were combined by Labview / Matlab to provide data input and conclusion verification for CAE analysis and optimization of vehicle body structure.