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| Quasi-static nonlinear analysis of deepwater drilling risers |
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CHANG Yuan-jiang1,CHEN Guo-ming1,SUN You-yi1,XU Liang-bin2
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(1. College of Mechanical and Electronic Engineering in China University of Petroleum，Dongying 257061，Shandong Province，China ;2. China Offshore Oil Research Center, Beijing 100027, China)
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| Abstract: |
| In order to find out the maximal combined wave-current loads when quasi-static analysis of the deepwater drilling riser was performed，the maximal Mises stress criterion for search of the maximal wave phase angle was proposed. Quasi-static analysis system for deepwater drilling riser was developed. Employing C++ Builder, the calculation was carried out by ABAQUS in the background，and object-oriented Python program was invoked to visit ODB file to extract calculation results. Then the automatic search of the maximal wave phase angle as well as the quasi-static nonlinear analysis of the drilling riser was implemented. An example, which illustrates the validity of the analysis system, was presented. The result indicates that the quasi-static response with wave phase angle of 180° is the maximal, followed by 90°, 270° and 0°, while the static response is between the quasi-static response with wave phase angle of 90° and 270°. |
| Key words: deepwater drilling risers combined wave-current loads quasi-static analysis |
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