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題名 | Damage Detection of Beam by Wavelet Based Approach of Strain Energy Damage Detection Method=小波應用於應變能損害偵測法之研究 |
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作者姓名(中文) | 張智傑; | 書刊名 | 機械技師學刊 |
卷期 | 6:2=22 2013.07[民102.07] |
頁次 | 頁1-4 |
分類號 | 440.12 |
關鍵詞 | 小波; 破損探測; Wavelet; Strain energy; |
語文 | 英文(English) |
中文摘要 | 小波分析具有良好的時域及頻域的解析能力,結構的裂縫或損傷會造成結構振動訊號上的微小擾動,靠著小波分析可以擷取出這個微小的擾動,所以本研究利用小波和應變能之分佈來做結構的破損偵測。首先利用有限元素法求得含裂縫樑之位移,再推導出量的應變能分佈,之後再利用小波轉換分析其應變能之分佈以求取裂縫之位置。最後由此方法本文發現藉由小波分析樑的應變能能偵測出損傷之位置,同時此方法對損傷的程度有很高的靈敏度,即使損傷程度很小的損傷也能發現損傷的位置。 |
英文摘要 | The problem of using wavelet analysis to detect and locate damage will be investigated in this paper. A method based on the changes in the strain energy of the beam will be discussed. This method just requires the displacement after damage. The wavelet analysis is used to analyze the strain energy of each section. It is observe d that distributions of the wavelet coefficients of fractional strain energy can identify the damage position by showing a peak at the position of the damage. |
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