Computation of Wave-Body Interactions Using the Panel-Free Method and Exact Geometry

[+] Author and Article Information
W. Qiu1

Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, Newfoundland, A1B 3X5, Canadaqiuw@engr.mun.ca

H. Peng

 Oceanic Consulting Corporation, St. John's, Newfoundland, A1B 2X5, Canada

J. M. Chuang

Mechanical Engineering Department, Dalhousie University, Halifax, Nova Scotia, B3J 1Z1, Canada


Corresponding author.

J. Offshore Mech. Arct. Eng 128(1), 31-38 (Feb 01, 2006) (8 pages) doi:10.1115/1.2151199 History:

A panel-free method was developed earlier to solve the radiation and the diffraction problems of floating bodies in waves in the time domain. This method has been extended to compute wave interactions with bodies in water of infinite depth and finite depth in the frequency domain. After removing the singularities in the boundary integral equation and representing the body surface exactly by either analytical description or NURBS surfaces, the boundary integral equation can be discretized over the exact body surface by Gaussian quadratures. Accuracy of the method is demonstrated by its application to the radiation and the diffraction problems of a floating hemisphere, a vertically floating axisymmetric cylinder, and a Wigley hull. Computed added-mass, damping coefficients, and wave exciting forces agree well with published results.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Coordinate system

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Figure 2

Surge added mass and damping coefficient for a hemisphere

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Figure 3

Control net and surface for a cylinder

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Figure 4

Added mass and damping coefficient for a cylinder in water of finite depth

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Figure 5

Control net and Gaussian point distribution (6×21) for a Wigley hull

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Figure 6

Heave wave exciting forces and phases for a Wigley hull



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