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根部柔性梁的不确定性建模与确认

DOI: 10.6052/1000-0992-20120109, PP. 52-56

Keywords: 悬臂梁,柔性参数,不确定性,建模,确认

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Abstract:

首先导出了包含根部挠性参数的悬臂梁动力学方程近似解,将平动和转动柔性参数作为不确定性源,根据若干预紧力矩下的模态实验结果完成了柔性参数识别,并假定其服从正态随机分布,识别了均值与标准差,进而通过回归分析建立了不确定参数随预紧力矩变化的数学模型.最后通过新的模态实验结果对所建模型进行了确认,通过确认结果,明确了该模型的使用范围.

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