| 基于小波变换的海洋平台损伤检测研究 |
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| 引用本文： | 林裕裕,王典鹤,王树青,王森.基于小波变换的海洋平台损伤检测研究[J].中国海洋大学学报(自然科学版),2011(Z1):413-419. |
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| 作者姓名： | 林裕裕 王典鹤 王树青 王森 |
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| 作者单位： | 山东省海洋工程重点实验室中国海洋大学; |
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| 基金项目： | 国家自然科学基金项目(50909088); 中国海洋大学SRDP项目(0911010805)资助 |
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| 摘 要： | 当结构物产生损伤时,结构的动力特性会发生变化,从而引起结构振动响应产生相应的变化。小波变换是奇异性信号的良好检测工具,可以用于识别结构损伤的发生。建立了某海洋平台有限元模型,得到了随机海浪作用下不同损伤工况的结构振动响应。基于小波变换损伤检测,针对不同类型杆件损伤、不同位置杆件损伤、不同程度的噪声污染以及不同方向振动响应信号情况下,分别研究了海洋平台结构的损伤检测问题,得到了一些有用的结论。
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| 关 键 词： | 小波变换 损伤检测 海洋平台 随机波浪 |
Study on Damage Detection of Offshore Platforms Based on Wavelet Transform |
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| LIN Yu-Yu,WANG Dian-He,WANG Shu-Qing,WANG Sen.Study on Damage Detection of Offshore Platforms Based on Wavelet Transform[J].Periodical of Ocean University of China,2011(Z1):413-419. |
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| Authors: | LIN Yu-Yu WANG Dian-He WANG Shu-Qing WANG Sen |
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| Institution: | LIN Yu-Yu,WANG Dian-He,WANG Shu-Qing,WANG Sen(Shandong Provincial Key Lab of Ocean Engineering,Ocean Oniversity of China,Qingdao 266100,China) |
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| Abstract: | When damage occurs in the structural members,the structural dynamic characteristics will change and produce singular signals.Therefore wavelet transform could be used to detect the damage occurrence.An offshore platform was modeled via finite element method and the acceleration signals under simulated random wave were computed.Based on wavelet transform,damage detection was investigated and four cases are considered,including damage detection for different types of damaged members,damaged members located in... |
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| Keywords: | wavelet transform damage detection offshore platform random wave |
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