| 基于小波变换的固定式海洋平台结构损伤识别方法研究 |
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| 引用本文： | 张强,嵇春艳,范佰明. 基于小波变换的固定式海洋平台结构损伤识别方法研究[J]. 海洋技术学报, 2008, 27(2): 52-56 |
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| 作者姓名： | 张强 嵇春艳 范佰明 |
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| 作者单位： | 江苏科技大学船舶与海洋工程系,江苏镇江,212003 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 小波变换在分析非平稳信号方面较傅立叶变换更有效,为了检测出海洋平台结构中裂缝或因刚度降低引起的损伤,对海洋平台的响应信号进行离散小波变换,通过分析变换后的信号是否有突变现象判断结构是否出现损伤,并结合模态应变能法实现了对结构损伤的定位,探讨了传感器位置对识别效果的影响。
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| 关 键 词： | 小波变换 损伤识别 海洋平台 |
| 文章编号： | 1003-2029(2008)02-0052-05 |
| 修稿时间： | 2007-11-22 |
Study on Methods for Identifying Structure Damages to Fixed Offshore Platforms Based on Wavelet Transform |
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| ZHANG Qiang,JI Chun-yan,FAN Bai-ming. Study on Methods for Identifying Structure Damages to Fixed Offshore Platforms Based on Wavelet Transform[J]. Ocean Technology, 2008, 27(2): 52-56 |
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| Authors: | ZHANG Qiang JI Chun-yan FAN Bai-ming |
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| Abstract: | Wavelet transform is more effective than Fourier Transform in unstable signal analysis.In order to detect damages caused by rifts or stiffness loss in offshore platform structure,discrete wavelet transform is used to analyze response signal for offshore platforms.Transformed signals are used to determine whether the structure is damaged,and the modal strain energy method is also added for determining the location of the structure damages.Furthermore,the influence of the position of the sensor on the results of damage identification is discussed. |
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| Keywords: | wavelet transform damage identification offshore platform |
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