Numerical prediction of ship hydrodynamics based on Taylor series expansion method

HU Wei; HUI Ning; WU Zhi-fei; ZHANG Teng; ZHOU Bo

doi:10.16411/j.cnki.issn1006-7736.2021.02.006

Journal of Dalian Maritime University >

2021 , Vol. 47 >Issue 2: 45 - 55

DOI: https://doi.org/10.16411/j.cnki.issn1006-7736.2021.02.006

Numerical prediction of ship hydrodynamics based on Taylor series expansion method

HU Wei ,
HUI Ning ,
WU Zhi-fei ,
ZHANG Teng ,
ZHOU Bo

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(1.Offshore Oil Engineering Co., Ltd., Tianjin 300451, China; 2. State Key Laboratory of Structural Analysis for Industrial Equipment, School of Naval Architecture Engineering, Dalian University of Technology, Dalian 116024, China)

Received date: 2020-12-25

Revised date: 2021-03-18

Online published: 2021-03-18

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Abstract

In order to reduce the numerical error of the threedimensional time domain Green function caused by unclear division between small time parameter and large time parameter, Taylor series expansion method was used to calculate the threedimensional time domain Green function in the junction between small time parameter region and large time region. Based on linear superposition principle, the ship radiation problem and diffraction problem were solved by using the impulse response function method. The Wigley I hull ship was taken as a study case, and the numerical results show that the accuracy of threedimensional time domain Green function is improved by four orders of magnitude in the junction between small time parameter region and large time region, and the hydrodynamic results of above method are in good agreement with other published results and experimental data, which proves the reliability of the hydrodynamic analysis model established in this paper.

Key words： ship hydrodynamic; three-dimensional time domain Green function; Taylor series expansion method; impulse response function method; radiation problem

Cite this article

HU Wei , HUI Ning , WU Zhi-fei , ZHANG Teng , ZHOU Bo . Numerical prediction of ship hydrodynamics based on Taylor series expansion method[J]. Journal of Dalian Maritime University, 2021 , 47(2) : 45 -55 . DOI: 10.16411/j.cnki.issn1006-7736.2021.02.006

References

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