大型集装箱船快速波激响应分析
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摘要
大型船舶的水弹性分析,对于船舶结构设计尤为重要。论文以某万箱级集装箱船为目标船型,采用三维结构分析与二维耐波性相结合的混合水弹性预报方法,进行快速波激振动响应分析。数值模拟采用MSC. Patran&Nastran有限元方法进行模态分析和基于MFS算法的STF切片法进行耐波性计算,并分别利用Bernoulli梁的解析解和HydroSTAR软件进行模型验证,最后基于模态叠加原理进行频域的波激响应预报。数值结果表明:该混合数值方法简化了网格划分耗时、提高了计算效率、满足了工程计算精度,具有较好的工程实用价值。
The hydroelasticity analysis of large vessels plays a significant role in the ship design. In this paper, three-dimensional Finite Element Method(FEM) and two-dimensional seakeeping analysis are combined to solve the springing of very large container ship. The modal analysis and ship distortion of very large container ship are calculated by the MSC. Patran&Nastran software. STF strip theory based on Method of Fundamental Solutions(MFS) is used to solve generalised fluid forces. The thesis method is validated through the beam theorical solutions and the ship motions results of HydroSTAR software. Finally, the springing results are obtained via using modal superpositon method. The efficiency and accuracy of this methodology are superior to the three-dimensional and two-dimensional hydroelasticity method respectively, which has the practical value in engineering.
The hydroelasticity analysis of large vessels plays a significant role in the ship design. In this paper, three-dimensional Finite Element Method(FEM) and two-dimensional seakeeping analysis are combined to solve the springing of very large container ship. The modal analysis and ship distortion of very large container ship are calculated by the MSC. Patran&Nastran software. STF strip theory based on Method of Fundamental Solutions(MFS) is used to solve generalised fluid forces. The thesis method is validated through the beam theorical solutions and the ship motions results of HydroSTAR software. Finally, the springing results are obtained via using modal superpositon method. The efficiency and accuracy of this methodology are superior to the three-dimensional and two-dimensional hydroelasticity method respectively, which has the practical value in engineering.
引文
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[3]Wu Y.Hydroelasticity of floating bodies[D].University of Brunel,UK,1984.
[4]Price W G,Wu Y.Hydroelasticity of marine structures[M].Theoretical and Applied Mechanics,Eds Niordson F I and Olhoff N,Elsevier Science Publishers B.V.(North-Holland),1985:311-337.
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[7]Wang S,Ertekin R C,Riggs H R.Computationally efficient techniques in the hydroelasticity analysis of very large floating structures[J].Computers&Structures,1997,62(4):603-610.
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[9]Feng P,Ma N,Gu X.Application of method of fundamental solutions in solving potential flow problems for ship motion prediction[J].Journal of Shanghai Jiao Tong University(Science),2013,18:153-158.
[10]董艳秋.船舶波浪外荷和水弹性[M].天津:天津大学出版社,1991.Dong Y Q.Sea loads and hydroelasticity on ships[M].Tianjin:Tianjin University Press,1991.
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[2]田超,吴有生.船舶水弹性力学理论的研究进展[J].中国造船,2008,49(4):1-11.Tian C,Wu Y S.Review of research on the hydroelasticity of ship[J].Shipbuilding of China,2008,49(4):1-11.
[3]Wu Y.Hydroelasticity of floating bodies[D].University of Brunel,UK,1984.
[4]Price W G,Wu Y.Hydroelasticity of marine structures[M].Theoretical and Applied Mechanics,Eds Niordson F I and Olhoff N,Elsevier Science Publishers B.V.(North-Holland),1985:311-337.
[5]Golberg M A.The method of fundamental solutions for Poisson’s equation[J].Engineering Analysis with Boundary Elements,1995,16:205-213.
[6]Fairweather G,Karageorghis A.The method of fundamental solutions for elliptic boundary value problems[J].Advances in Computational Mathematics,1998,9:69-95.
[7]Wang S,Ertekin R C,Riggs H R.Computationally efficient techniques in the hydroelasticity analysis of very large floating structures[J].Computers&Structures,1997,62(4):603-610.
[8]Salvesen N,Tuck E O,Faltinsen O.Ship motions and sea loads[J].Trans.SNAME,1970,78(8):250-287.
[9]Feng P,Ma N,Gu X.Application of method of fundamental solutions in solving potential flow problems for ship motion prediction[J].Journal of Shanghai Jiao Tong University(Science),2013,18:153-158.
[10]董艳秋.船舶波浪外荷和水弹性[M].天津:天津大学出版社,1991.Dong Y Q.Sea loads and hydroelasticity on ships[M].Tianjin:Tianjin University Press,1991.
[11]周焕林.MSC.Patran&MSC.Nastran入门和实例[M].合肥:合肥工业大学出版社,2006.Zhou H L.Introduction and examples of MSC.Patran&MSC.Nastran[M].Hefei:Hefei University of Technology Press,2006.