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论文类型： 期刊论文

发表时间： 2010-12-01

发表刊物： JOURNAL OF MARINE SCIENCE AND TECHNOLOGY-TAIWAN

收录刊物： SCIE、EI、Scopus

卷号： 18

期号： 6

页面范围： 875-882

ISSN号： 1023-2796

关键字： small-scale cylinders; wave force; time domain analysis; offshore structures

摘要： To get the accurate wave loads on the small-scale cylinders on the platforms, not only the incident wave but also the diffraction and radiation wave should be considered. By taking the wave diffraction from a fixed large-scale cylinder as an example, wave loads on small-diameter cylinders in the diffraction wave field are calculated by Morison formula in this paper. A time-domain numerical model on wave diffraction from large-scale structures is developed with a higher-order boundary element method (HOBEM). Then the velocity and acceleration of any water particle in the fluid domain can be produced from the solved diffraction potential. Results show that the incident wave force is even equal to diffraction wave force when the diameter of the large-scale cylinder is 8 times as great as the small-scale one; And the total force is different with the locations of the small-scale cylinder. The maximum total force is 1.57 times as great as only the incident wave force. Therefore, the wave force on the stake produced by the diffraction waves due to the existence of upper structures should be considered in the practical engineering.