利用模式縮減之結構損傷偵測分析法

A Structural Damage Detection Method with Model Reduction

江達雲(Dar-Yun Chiang) ； 胡立聖(Li-Sheng Hu)

《航空太空及民航學刊.系列B》 38卷2期 (2006/10) Pp. 71-77

https://doi.org/10.6124/JAAA.200610_38(2).01

摘要

本文針對結構振動量測所得模態資訊不完整的情況下，以系統識別理論觀點進行結構勁度損傷偵測。利用模式縮減觀念配合二階段損傷偵測法，可以不完整模態資訊識別出結構損傷之部位及程度。在模式縮減法之研究，本文配合模態力平衡法發展個別模態縮減法應用於損傷偵測上，得到比一般縮減法更?精確之結果。數值分析結果顯示，本文所提之模式縮減法配合二階段損傷偵測法，在適當反應數據的提供下能有效識別出結構之損傷部位與程度。

關鍵字

結構損傷偵測 ； 模式縮減 ； 二階段偵測法

並列摘要

In this paper, structural damage detection analysis is conducted with consideration of incomplete modal information. In the process of structural damage detection, a two-stage method in combination with a model reduction method is employed, in which structural parts that are possibly damaged will be located using force balance method, and the extent of damage will then be evaluated using a global optimization technique. An independent-mode reduction method is proposed to work with the force balance method, which gives better results for damage detection than conventional model reduction methods do. Applicability and effectiveness of the proposed method is demonstrated by simulations of a chain model and a large truss structure, respectively.

並列關鍵字

Structural damage detection ； Model reduction ； Two-stage detection method