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Keywords: singularity
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Proceedings Papers

Paper presented at the The 32nd International Ocean and Polar Engineering Conference, June 5–10, 2022
Paper Number: ISOPE-I-22-562
... by distributions of singularities over panels used to approximate the ship hull surface. This basic element of the Green-function method is considered for steady motion of ships in the subcritical and supercritical flow regimes. An analytical representation of the flow created by a general distribution...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-593
...; the triangular mesh generator that utilizes the advancing front method and the point projection technique; and the post-processor that handles mesh quality improvements and code performance statistics. An example of a singularity caused by poor parameterizations is discussed and a modified projection matrix...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-081
..., and then solving it by the Lie-group shooting method. The second-order equation is singular, which is however much saving computational cost than the original equation defined in an infinite range. In order to overcome the singularity we consider a perturbed equation. The newly developed Lie-group shooting method...
Proceedings Papers

Paper presented at the The Eighteenth International Offshore and Polar Engineering Conference, July 6–11, 2008
Paper Number: ISOPE-I-08-440
... at the apex area of the yield surface. These singularities often cause the stress-point integration algorithm to perform inefficiently or even fail. Recently, some advanced methods have been presented to eliminate the singularity and good results have been achieved. For cohesionless-frictional geomaterial...
Proceedings Papers

Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-407
... is linearised about the undisturbed position of the body and the free surface condition is linearised about the mean water surface. The potential is represented by a distribution of sources over the surface of the ship and its waterline. The problem is solved by the method of singularities distributed over...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-290
... the complex frequencies for which the scattering matrix is singular. These singularities are found by using a complex singularity search for a crude estimate. This method allows us to be certain that we have found all the singularities. We then use Newton's method to determine them very accurately...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-038
... impact pressure vlf free surface elevation estimation surface condition singularity integral equation elevation free surface condition velocity potential incident wave approximation relative wave elevation artificial intelligence boundary condition inner region wave elevation subsea...
Proceedings Papers

Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-269
...). control equation frequency nonlinear numerical wave tank power plant flow rate dipole absorption simulation owc device air flow rate artificial intelligence boundary machine learning numerical wave tank chatry singularity control strategy upstream oil & gas fluid domain equation...
Proceedings Papers

Paper presented at the The Eighth International Offshore and Polar Engineering Conference, May 24–29, 1998
Paper Number: ISOPE-I-98-258
... ABSTRACT Wave-free floating body forms in shallow water are studied using a wave-free singularity that is made by a source and vertical dipole combination to generate bulbous-shaped two- and three-dimensional bodies. The wave-free floating body is free from wave exciting vertical force...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-299
... dimensional effect positon exp solitary wave zagrodzinski cambridge university press dispersion regime singularity nonlinear evolution equation equation algebraically evolution equation fluid mechanics artificial intelligence korteweg-de vry equation mathematical physics long...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-374
... ABSTRACT In this paper, a new method for simulation of waves in a large domain is developed. In this method, the famous Barnes-Hut (BH) fast hierarchical algorithm is modified to evaluate the influence of all the singularities and an iterative solver of the Krylov-subspace type, called...
Proceedings Papers

Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-185
... of linear equations set- up has very large condition numbers in the vicinity of eigen frequencies. water plane wave diffraction equation element method body surface integral equation unique solvable higher order bem discretization frequency singularity higher order element radiation...
Proceedings Papers

Paper presented at the The Fifth International Offshore and Polar Engineering Conference, June 11–16, 1995
Paper Number: ISOPE-I-95-325
... kthe caustic method specimen stress intensity factor specimen configuration romm initial curve ro relation singularity artificial intelligence schematic illustration initial curve radius measurement value relation betwccn open notch kexp theoretical value Abstract...
Proceedings Papers

Paper presented at the The Second International Offshore and Polar Engineering Conference, June 14–19, 1992
Paper Number: ISOPE-I-92-225
... of elementary functions of one variable, and a more complex nonoscillatory near-field term which is singular and is a function of two variables. The latter term is expressed as the sum of an elementary function that completely accounts for the singularity, and a remainder that is everywhere continuous...
Proceedings Papers

Paper presented at the The Second International Offshore and Polar Engineering Conference, June 14–19, 1992
Paper Number: ISOPE-I-92-235
... velocity referred to as stopping velocity, or a point in space, referred to as blockage point, where no energy of a wave of specified frequency can propagate further upstream. Most accounts predict a singularity in wave amplitude at the blockage point and assume that the wave breaks before reaching...
Proceedings Papers

Paper presented at the The Second International Offshore and Polar Engineering Conference, June 14–19, 1992
Paper Number: ISOPE-I-92-031
... verification field point equation method transformation wave force boundary element cancellation method tension leg platform pinkster accuracy hemisphere issc tlp singularity artificial intelligence elastic catenary cable theory excitation kernel equation 1. INTRODUCTION...
Proceedings Papers

Paper presented at the The Second International Offshore and Polar Engineering Conference, June 14–19, 1992
Paper Number: ISOPE-I-92-159
... intelligence excitation real part coefficient cable expansion singularity Proceedings of the Second (1992) International Offshore and Polar Engineering Conference San Francisco, USA, 14-19 June 1992 ' Copyright © 1992 by The International Society of Offshore and Polar Engineers ISBN 1-880653-00-1 (Set...
Proceedings Papers

Paper presented at the The Second International Offshore and Polar Engineering Conference, June 14–19, 1992
Paper Number: ISOPE-I-92-144
... stiffness into the cable equations and thus removing the singularity that occurs when the cable tension becomes zero. Numerical results for several tether-vehicle maneuvers are presented. 1. INTRODUCTION The use of tethered remotely operated underwater vehicles (ROV) by the offshore industry...

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