| 子波变换在结构疲劳裂纹动态检测中的应用研究 |
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| 引用本文： | 张维锋 刘万锋. 子波变换在结构疲劳裂纹动态检测中的应用研究[J]. 振动与冲击, 1998, 17(3): 66-70 |
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| 作者姓名： | 张维锋 刘万锋 |
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| 基金项目： | 西安公路交通大学青年科技基金资助 |
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| 摘 要： | 本文利用子波分析技术,通过对带有预制裂纹的简支梁模型受迫振动时裂纹处应变响应信号进行多次子波变换,提取了淹没于强低频信号中微弱的裂纹信号分量,实验表明,这种方法能较好地获取结构裂纹处的局部应力/应变特性。
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| 关 键 词： | 子波变换 多分辨分析 疲劳裂纹 应变响应 |
APPLICATION OF WAVELET ANALYSIS IN DYNAMIC DETECTION OF AUTOMOTIVE PARTS'' FATIGUE CRACKS |
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| Abstract: | A new method for detecting structure's fatigue cracks is discussed in the paper. In model tests of a simply sappored beam with prefabricated cracks, a weak signal component which affects strain concentration due to cracks and is buried in strong response signal can be detected using wavelet multiresolution analysis. The results show it is a better way to obtain structure's local strain/stress properties near the crack area. |
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| Keywords: | wavelet multiresolution analysis?strain response fatigue crack |
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