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題 名 | Damage Detection of the Variable-cross-section Beam by Wavelet Analysis=小波於漸細型樑損傷探測上之應用 |
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作 者 | 張智傑; | 書刊名 | 機械技師學刊 |
卷 期 | 6:4=24 2013.12[民102.12] |
頁 次 | 頁102-105 |
分類號 | 440.12 |
關鍵詞 | 小波; 破損探測; Variable-cross-section beam; Wavelet; Damage detection; |
語 文 | 英文(English) |
中文摘要 | 小波分析具有良好的解析能力,而結構的損傷會造成結構位移訊號上的微小擾動,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來作漸細型樑的損傷偵測上之應用,樑結構的損傷乃是以降低的楊氏係數值來表示,結果顯示小波分析能顯示出漸細型樑的損傷位置,對損傷的程度都有很高的靈敏度,即使損傷程度很小的損傷也能發現損傷的位置。 |
英文摘要 | This paper presents a technique for structure damage detection based on the wavelet analysis. The main purpose of this paper is to predict the positions of damage based on spatial wavelet analysis. Many damage detection methods require modal properties before and after damage. This method only needs the spatially distributed signals (e.g. the displacements) of the beam after damage. First, spatially distributed signals of the variable-cross-section beam with damage are obtained by finite element method. In this paper, the damaged region is represented as the elements with reduced stiffness. Then the displacements of damaged beam are analyzed by wavelet transformation. It is observed that distributions of the wavelet coefficients can identify the damage position of the variable-cross-section beam by showing a peak at the position of the damage. |
本系統中英文摘要資訊取自各篇刊載內容。