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本文基于单元模态应变能改变率的概念,导出了结构破损位置的诊断方法,方法仅以结构破损前后的模态振型和单元刚度矩阵为输入信息。用单元模态应变能改变率对管道进行损伤分析,得到较好的破损诊断结果,并且方法简便,有效。
Based on the concept of rate of change of unit modal strain energy, this paper derives a method to diagnose the position of structural damage. The method only takes the modal shape and unit stiffness matrix before and after structural damage as the input information. The damage modalities of the pipeline were analyzed by the rate of change of unit modal strain energy to get a better diagnosis result of damage, and the method was simple and effective.