Stress Intensity Factor Calculation of Surface Crack at Weld Toe of Ocean Engineering Structures Under Wave Loads

Journal of Shanghai Jiaotong University ›› 2016, Vol. 50 ›› Issue (02): 288-293.

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Stress Intensity Factor Calculation of Surface Crack at Weld Toe of Ocean Engineering Structures Under Wave Loads

YAN Xiaoshun1,2,HUANG Xiaoping1,LIANG Yuanhua3,LI Luodong3

(1. Collaborative Innovation Center for Advanced Ship and DeepSea Exploration, Shanghai Jiaotong University, Shanghai 200240, China; 2. China Ship Development and Design Center, Wuhan 430064, China; 3. Marine Technology Center of China Classification Society, Beijing 100007, China)

Received:2014-11-30 Online:2016-02-29 Published:2016-02-29

Abstract

Abstract: Abstract： This paper proposed a stress intensity factor calculation method for structures under wave loads. The proposed method was proved correct by comparing it with the empirical formulas. Then, the method was applied to the surface crack at weld toe of a bracket between the column and brace of a semisubmersible platform. The results show that the stress intensity factor ranges calculated by empirical formulas are very different from those of the proposed method. The stress intensity factor ranges for all crack sizes of a structure under wave loads can be derived by a part of results obtained by the proposed method.

Key words: Key words： semisubmersible platform, semielliptical crack, stress intensity factor, fatigue crack propagation, waveinduced load

CLC Number:

O 353

YAN Xiaoshun1,2,HUANG Xiaoping1,LIANG Yuanhua3,LI Luodong3. Stress Intensity Factor Calculation of Surface Crack at Weld Toe of Ocean Engineering Structures Under Wave Loads[J]. Journal of Shanghai Jiaotong University, 2016, 50(02): 288-293.

References

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Stress Intensity Factor Calculation of Surface Crack at Weld Toe of Ocean Engineering Structures Under Wave Loads

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