Crack propagation-based fatigue life analysis for deepwater semi-submersible platform
Crack propagation-based fatigue life analysis for deepwater semi-submersible platform
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发表时间：
2013
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通讯作者：
C. Le
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作者：
C. Le
This paper studies the fatigue crack propagation assessment for the deepwater semi-submersible platform. The model of fatigue crack propagation and the calculation method of fatigue life for platform structures are introduced. The global strength and fatigue lives of the platform in different sea-state are analyzed to determine the fatigue key parts. Then, the stress responses of the fatigue key parts are analyzed to gain the equivalent stress amplitude. The fatigue lives of key parts are calculated using the unique crack growth rate curve model which considers the affect of the threshold, stress ratio and other factors. The results show that the fatigue crack propagation lives of key parts in different sea-state can meet the design requirements; the method of crack growth-based fatigue analysis is suitable for the fatigue assessment of the platform.
