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Citation:
　Yingchao Li,Shuqing Wang,Min Zhang,et al.An Improved Modal Strain Energy Method for Damage Detection in Offshore Platform Structures[J].Journal of Marine Science and Application,2016,(2):182-192.[doi:10.1007/s11804-016-1350-1]
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An Improved Modal Strain Energy Method for Damage Detection in Offshore Platform Structures

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Title:
An Improved Modal Strain Energy Method for Damage Detection in Offshore Platform Structures
Author(s):
Yingchao Li1;  Shuqing Wang2;  Min Zhang2;  Chunmei Zheng1
Affilations:
Author(s):
Yingchao Li1;  Shuqing Wang2;  Min Zhang2;  Chunmei Zheng1
1. College of Civil Engineering, Ludong University, Yantai 264025, China;
2. Department of Ocean Engineering, Ocean University of China, Qingdao 266100, China
Keywords:
damage detection; modal strain energy; offshore platform structure; modal frequency; mode shape
分类号:
-
DOI:
10.1007/s11804-016-1350-1
Abstract:
The development of robust damage detection methods for offshore structures is crucial to prevent catastrophes caused by structural failures. In this research, we developed an Improved Modal Strain Energy (IMSE) method for detecting damage in offshore platform structures based on a traditional modal strain energy method (the Stubbs index method). The most significant difference from the Stubbs index method was the application of modal frequencies. The goal was to improve the robustness of the traditional method. To demonstrate the effectiveness and practicality of the proposed IMSE method, both numerical and experimental studies were conducted for different damage scenarios using a jacket platform structure. The results demonstrated the effectiveness of the IMSE method in damage location when only limited, spatially incomplete, and noise-polluted modal data is available. Comparative studies showed that the IMSE index outperformed the Stubbs index and exhibited stronger robustness, confirming the superiority of the proposed approach.

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Memo

Memo:
Received date: 2015-11-19;Accepted date: 2015-12-21。
Foundation item: Supported by the National Natural Science Foundation of China (51209189, 51379196), and the Natural Science Foundation of Shandong Province (ZR2013EEQ006, ZR2011EL049)
Corresponding author: Yingchao Li,E-mail:yingchao.ouc@163.com
Last Update: 2016-07-06