| 浅海导管架平台结构损伤诊断试验研究 |
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| 引用本文： | 刘杰鸣,李绂,黄维平,石湘.浅海导管架平台结构损伤诊断试验研究[J].海洋工程,2011,29(4):37-42. |
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| 作者姓名： | 刘杰鸣 李绂 黄维平 石湘 |
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| 作者单位： | 中国石油集团海洋工程有限公司;中国海洋大学工程学院; |
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| 摘 要： | 基于模型试验研究了浅海导管架平台的结构损伤诊断,采用标量型ARMA模型识别出结构的三阶模态参数,分别采用遗传算法和模态应变能法对试验模型不同模拟损伤工况进行了损伤诊断。基于遗传算法,提出了采用不同自由度一阶模态参数的损伤诊断方法。研究表明,由于海洋平台的前三阶模态分别为不同自由度的一阶模态,采用两阶或三阶模态识别损伤时,损伤杆件影响较小的自由度方向的模态参数对结构的损伤诊断将产生不利的影响,成为识别噪声。因此,可分别采用不同自由度的一阶模态进行结构损伤诊断。
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| 关 键 词： | 导管架平台 结构损伤诊断 模态应变能法 遗传算法 模态识别 |
Experimental study on damage diagnosis of shallow water jacket platform |
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| LIU Jie-ming,LI Fu,HUANG Wei-ping and SHI Xiang.Experimental study on damage diagnosis of shallow water jacket platform[J].Ocean Engineering,2011,29(4):37-42. |
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| Authors: | LIU Jie-ming LI Fu HUANG Wei-ping and SHI Xiang |
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| Institution: | LIU Jie-ming1,LI Fu1,HUANG Wei-ping2,SHI Xiang2(1.Offshore Engineering Co.of China National Petroleum Group,Beijing 100176,China,2.Ocean University of China,Qingdao 266100,China) |
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| Abstract: | Damage diagnosis of shallow water jacket platform is studied based on model tests.The first three frequencies and mode shapes are identified by using scalar ARMA model.The structural damages with different cases are detected based on genetic algorithm and mode strain energy method.It is proposed that structural damage could be detected by using first order mode parameter of the different freedoms of structures based on genetic algorithm.The results show that since the first three model parameters are the fi... |
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| Keywords: | jacket platform structural damage detection mode strain energy method genetic algorithm mode identification |
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