教授 博士生导师 硕士生导师
主要任职: 建设工程学院副院长
其他任职: 海岸和近海工程国家重点实验室主任
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 建设工程学院
学科: 港口、海岸及近海工程. 流体力学
办公地点: 海岸和近海工程国家重点实验室A309
联系方式: 0411-84708267
电子邮箱: dzning@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2014-01-01
发表刊物: SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
收录刊物: SCIE、EI
卷号: 57
期号: 1
页面范围: 152-165
ISSN号: 1674-7348
关键字: coupled method; full time-domain; second-order; truss spar; rod theory; irregular wave
摘要: A new full time-domain nonlinear coupled method has been established and then applied to predict the responses of a Truss Spar in irregular wave. For the coupled analysis, a second-order time-domain approach is developed to calculate the wave forces, and a finite element model based on rod theory is established in three dimensions in a global coordinate system. In numerical implementation, the higher-order boundary element method (HOBEM) is employed to solve the velocity potential, and the 4th-order Adams-Bashforth-Moultn scheme is used to update the second-order wave surface. In deriving convergent solutions, the hull displacements and mooring tensions are kept consistent at the fairlead and the motion equations of platform and mooring-lines/risers are solved simultaneously using Newmark-beta integration scheme including Newton-Raphson iteration. Both the coupled quasi-static analysis and the coupled dynamic analysis are performed. The numerical simulation results are also compared with the model test results, and they coincide very well as a whole. The slow-drift responses can be clearly observed in the time histories of displacements and mooring tensions. Some important characteristics of the coupled responses are concluded.