| 基于小波变换的海洋平台结构损伤检测 |
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| 引用本文： | 李东升,张兆德,王德禹.基于小波变换的海洋平台结构损伤检测[J].船舶力学,2010,14(3):243-251. |
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| 作者姓名： | 李东升 张兆德 王德禹 |
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| 作者单位： | 上海交通大学海洋工程国家重点实验室,上海,200030;浙江海洋学院,浙江,舟山,316000 |
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| 基金项目： | Supported by National Natural Science Foundation of China (No.50379025);;Teaching and Research Award Program (2002) for Outstanding Young Teachers in Higher Education Institutions of Ministry of Education,P.R.China |
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| 摘 要： | 基于结构动力特性的海洋工程结构损伤检测是一个非常有工程应用价值的研究课题。特别是对于海洋平台水线以下的结构损伤,一般通过结构的频率、振型和频响函数等的变化用来发现损伤。但是对于早期的损伤(通常损伤量很小),上述结构动力特性参数的变化可能很小从而不足以反映结构的这种早期微小损伤。文章提出采用小波变换的方法来进行小损伤的检测,将结构的频响函数(FRF)和加速度响应进行小波变换,很好地预报了损伤的存在。文中还以某海洋平台为例,进行了模型试验,从而验证了提出方法的可行性。
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| 关 键 词： | 海洋平台 损伤检测 小波变换 动力特性 |
Damage Detection for Offshore Platform by Wavelet Transform |
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| LI Dong-sheng,ZHANG Zhao-de,WANG De-yu.Damage Detection for Offshore Platform by Wavelet Transform[J].Journal of Ship Mechanics,2010,14(3):243-251. |
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| Authors: | LI Dong-sheng ZHANG Zhao-de WANG De-yu |
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| Institution: | 1 State Key Laboratory of Ocean Engineering;Shanghai Jiao Tong University;Shanghai 200030;China;2 Zhejiang Ocean University;Zhoushan 316000;China |
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| Abstract: | Damage detection in offshore structures using the dynamic parameters is becoming an important research topic.Parameters such as frequencies,modal shapes and frequency response function(FRF) are used to detect the damage.When some damage in the underwater structure occurs,these dynamic parameters of the structure will change.The shift of the parameters can be used to identify the damage,the location and even the damage magnitude.The damage at different locations can make the parameters change differently.How... |
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| Keywords: | offshore platform damage detection wavelet transform dynamic characteristics |
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