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Topics on Boundary-Element Solutions of Wave Radiation-Diffraction Problems
1985Abstract : Two topics on the numerical solution of boundary-integral equations arising in linear wave-body interactions are discussed. The properties of a spectral technique for the solution of the integral equation are analyzed and compared to the conventional collocation method. It is shown that, using this technique, hydrodynamic forces predicted by
Chang-Ho Lee, Paul D. Sclavounos
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International Journal for Numerical Methods in Engineering, 1981
AbstractTwo of the most promising localized finite element methods are compared: the boundary series element method, in which a series of eigenfunctions is used to represent the far field solution; and the boundary integral element method, in which an integral equation is satisfied at the boundary between localized finite element and outer regions. The
Taylor, R. Eatock, Zietsman, J.
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AbstractTwo of the most promising localized finite element methods are compared: the boundary series element method, in which a series of eigenfunctions is used to represent the far field solution; and the boundary integral element method, in which an integral equation is satisfied at the boundary between localized finite element and outer regions. The
Taylor, R. Eatock, Zietsman, J.
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Note on a general relation between diffraction and radiation problems in acoustics
The Journal of the Acoustical Society of America, 1977A general relation between the farfield amplitudes of the diffraction and the radiation problems by a rigid body is deduced.
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A direct boundary-element method for three-D wave diffraction and radiation problems
Ocean Engineering, 1988Abstract Three-dimensional analytical procedures are developed for determining the wave-exciting and motion-induced hydrodynamic forces for fixed and floating ocean structures in a fluid of finite or infinite depth. The fluid potential is expressed by means of a Helmholtz integral, which involves the normal fluid velocities at the fluid-structure ...
Chih-Kang Lee, Jack Y.K. Lou
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Weak radiation condition in the problem of a plane wave diffraction by a wedge
MMET '96. VIth International Conference on Mathematical Methods in Electromagnetic Theory. Proceedings, 2002The Kontorovich-Lebedev transform is used for the solution of various problems of diffraction by a wedge. A failure of this transform is that it is applicable to a narrow class of functions not containing, in particular, a complete solution to the problem of diffraction.
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Pre-wave zone effect in transition and diffraction radiation: Problems and solutions
Physics Letters A, 2005Transition radiation (TR) and diffraction radiation (DR) appearing as a result of dynamic polarization of medium has widely been used for electron beam diagnostics during the last few years. A lot of techniques for electron beam diagnostics imply description of these phenomena assuming that the radiated area of the target is negligibly small in ...
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Journal of Applied Physics, 2010
Gas-saturated, solid skeleton, porous media like geomaterials, polymeric and metallic foams or biomaterials are fundamental in a diverse range of applications, from structural materials to energy technologies. Most polymeric foams are used for noise control applications and knowledge of the manner in which the energy of sound waves is dissipated with ...
Ogam, Erick +2 more
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Gas-saturated, solid skeleton, porous media like geomaterials, polymeric and metallic foams or biomaterials are fundamental in a diverse range of applications, from structural materials to energy technologies. Most polymeric foams are used for noise control applications and knowledge of the manner in which the energy of sound waves is dissipated with ...
Ogam, Erick +2 more
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Radioengineering
As a rule, problems of radiation and diffraction on bodies of revolution of large electrical size are solved by the method of integral equations, since in this case the original boundary value problem can be reduced to a system of two Fredholm integral equations.
V.V. Akhiyarov +2 more
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As a rule, problems of radiation and diffraction on bodies of revolution of large electrical size are solved by the method of integral equations, since in this case the original boundary value problem can be reduced to a system of two Fredholm integral equations.
V.V. Akhiyarov +2 more
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Journal of Marine Science and Technology, 2013
A time-domain higher-order boundary element method for seakeeping analyses in the framework of linear potential theory is newly developed. Ship waves generated by two modified Wigley models advancing at a constant forward speed in calm water or incident waves and the resultant radiation and diffraction forces are computed to validate this code.
Guanghua He, Masashi Kashiwagi
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A time-domain higher-order boundary element method for seakeeping analyses in the framework of linear potential theory is newly developed. Ship waves generated by two modified Wigley models advancing at a constant forward speed in calm water or incident waves and the resultant radiation and diffraction forces are computed to validate this code.
Guanghua He, Masashi Kashiwagi
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The Journal of the Acoustical Society of America, 1978
It is shown that the characteristic wave numbers for which the simple source formulation of acoustic diffraction problems fails can be obtained directly by use of the model’s integral equation. Characteristic wave numbers for diffraction by a rigid cylinder and by a rigid sphere are determined.
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It is shown that the characteristic wave numbers for which the simple source formulation of acoustic diffraction problems fails can be obtained directly by use of the model’s integral equation. Characteristic wave numbers for diffraction by a rigid cylinder and by a rigid sphere are determined.
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