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Damage Detection of Offshore Jacket Structures Using Frequency Domain Selective Measurements 被引量:1

Damage Detection of Offshore Jacket Structures Using Frequency Domain Selective Measurements
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摘要 The development of damage detection techniques for offshore jacket structures is vital to prevent catastrophic events. This paper applies a frequency response based method for the purpose of structural health monitoring. In efforts to fulfill this task, concept of the minimum rank perturbation theory has been utilized. The present article introduces a promising methodology to select frequency points effectively. To achieve this goal, modal strain energy ratio of each member was evaluated at different natural frequencies of structure in order to identify the sensitive frequency domain for damage detection. The proposed methodology opens up the possibility of much greater detection efficiency. In addition, the performance of the proposed method was evaluated in relation to multiple damages. The aforementioned points are illustrated using the numerical study of a two dimensional jacket platform, and the results proved to be satisfactory utilizing the proposed methodology.
出处 《Journal of Marine Science and Application》 2013年第2期193-199,共7页 船舶与海洋工程学报(英文版)
基金 Financial Support by the Pars Oil and Gas Company(Grant No. 88-065)
关键词 damage detection structural health monitoring frequency response function offshore jacket platform minimum rank perturbation theory element modal strain energy ratio 结构损伤检测 选择性测量 外套 频域 结构健康监测 灾难性事件 模态应变能 导管架平台
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参考文献12

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