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| A precorrected-FFT higher-order boundary element method for multi-bodies hydrodynamic analyses |
| Received:October 11, 2011 Revised:November 07, 2011 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20126017 |
| KeyWord:higher-order boundary element method pre-corrected fast fourier transform method multi-bodies near trapping |
| Author | Institution |
| 姜胜超 |
大连理工大学 海岸和近海工程国家重点实验室,大连 |
| 勾莹 |
大连理工大学 海岸和近海工程国家重点实验室,大连 |
| 滕斌 |
大连理工大学 海岸和近海工程国家重点实验室,大连 |
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| Abstract: |
| Higher-order boundary element method (HOBEM) has been widely applied in the field of wave interaction with offshore structures,but it is still difficult to resolve the large scale problems such as multi-bodies hydrodynamics due to computer storage and computing cost being increased by O(N2) order.In this paper,a pre-corrected Fast Fourier Transform higher-order boundary element method (pFFT-HOBEM) is developed to reduce the computational time and computer memory by O(N) order.According to the comparison between pFFT-HOBEM and traditional HOBEM with different number of unknowns and the analysis about the computing cost at different parts of pFFT-HOBEM,the efficiency of present method to different mesh variable is studied.The optimal variable of pFFT mesh was recommended to minimize the time cost.Based on the present method,the hydrodynamic behavior of a four-cylinder structure and the near trapping phenomena is investigated. |