Crack detection in offshore platform structure based on structural intensity approach

被引：19

作者：

Tian, Xiaojie ^{[1
,2
]}

Liu, Guijie ^{[1
,2
]}

Gao, Zhiming ^{[1
]}

Chen, Pengfei ^{[1
]}

Mu, Weilei ^{[1
,2
]}

机构：

[1] Ocean Univ China, Dept Mech & Elect Engn, Qingdao 266100, Peoples R China

[2] Ocean Univ China, Key Lab Ocean Engn Shangdong Prov, Qingdao 266100, Peoples R China

来源：

JOURNAL OF SOUND AND VIBRATION | 2017年 / 389卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Offshore platform; Crack detection; Structural intensity; Power flow; POWER-FLOW ANALYSIS; DAMAGE DETECTION; MODAL DATA; PLATE;

D O I：

10.1016/j.jsv.2016.11.020

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Structural intensity approach is introduced to study the crack detection for offshore platform in the paper. The Line Spring Model (LSM) of surface crack is proposed based on plate crack structure, and thus the relationship between the additional angle, displacement and crack relative depth is achieved. Besides, the concept of appended structure borne sound intensity is introduced. The expression of appended structural intensity for crack damage is derived. By observing the input energy, distribution, transmission and vibration performance of structure intensity, evidence is provided for detection of crack location. Vibration analysis is conducted on the whole platform under multi environment load. Using the structural intensity approach, the crack is detected on the key point easily. Moreover, the K-shape welded pipe point is detected using structural intensity approach, and the crack can be detected accurately. Therefore, development structural intensity approach would be extremely useful to spread out technologies that can be applied for offshore platform crack detection accurately. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：236 / 249

页数：14

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