| 基于小波有限元法的悬臂梁裂纹识别的试验研究 |
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| 引用本文： | 李兵,陈雪峰,向家伟,訾艳阳,何正嘉.基于小波有限元法的悬臂梁裂纹识别的试验研究[J].机械工程学报,2005,41(5):114-118. |
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| 作者姓名： | 李兵 陈雪峰 向家伟 訾艳阳 何正嘉 |
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| 作者单位： | 西安交通大学机械工程学院,西安,710049 |
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| 基金项目： | 国家自然科学基金(50335030,50305012)
高校博士点基金(20040698026)
西安交通大学自然科学基金资助项目。 |
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| 摘 要： | 利用小波有限元法求解了裂纹悬臂梁的前三阶固有频率,并将其拟合成以裂纹位置和深度作为变量的固有频率解曲面;将实测的裂纹梁前三阶固有频率作为裂纹识别反问题的输入,绘制出各阶固有频率等高线,三条等高线的交点预测出裂纹存在的位置和深度。试验结果验证了算法的有效性,这为其实际应用提供了有力的试验依据。
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| 关 键 词： | 裂纹 识别 小波有限元 固有频率 |
| 修稿时间： | 2004年9月16日 |
EXPERIMENTAL INVESTIGATION OF CRACK IDENTIFICATION FOR THE CANTILEVER BEAM BASED ON WAVELET FINITE ELEMENT METHODS |
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| Li Bing,Chen Xuefeng,XIANG JiaWei,Zi Yanyang,He Zhengjia.EXPERIMENTAL INVESTIGATION OF CRACK IDENTIFICATION FOR THE CANTILEVER BEAM BASED ON WAVELET FINITE ELEMENT METHODS[J].Chinese Journal of Mechanical Engineering,2005,41(5):114-118. |
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| Authors: | Li Bing Chen Xuefeng XIANG JiaWei Zi Yanyang He Zhengjia |
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| Abstract: | The nature frequencies of the cantilever beams with various crack locations and depths are accurately obtained by means of wavelet finite element methods, and then the sur- face-fitting technique is employed to plot the surfaces of nature frequency. Measured natural frequencies are used in a crack detection process and the crack location and size can be identified through finding the point of intersection of three frequency contour lines. The experimental results verify the validity of the method, which provides a powerful evidence for practical application. |
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| Keywords: | Crack Identification Wavelet finite element Nature frequency |
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