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直管损伤识别的一种简化方法

, PP. 54-67

Keywords: 直管损伤模型,波动方程,单向波动,波动反问题,无损检测

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Abstract:

本文首先讨论了将直管中三维频散波问题简化为一维定型波问题的条件。在此条件下讨论了将管中全波场分离为单向波场的方法。由此提出了使用敲击方法检测直管损伤是否存在和判断损伤程度的两个简化模型连续损伤模型,用于描述直管在有限长度上刚度的改变;简化裂缝模型,用于近似描述裂缝自由面效应。基于这两个模型提出了直管损伤的简化反演方法,并通过数值算例详细讨论了此法的可行性和灵敏度。在结语中简要讨论了进一步研究工作。

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