نتایج جستجو برای: boundary element approach

تعداد نتایج: 1596323  

Journal: :Archives of Computational Methods in Engineering 2014

Journal: :JSME international journal. Ser. A, Mechanics and material engineering 1994

2014
Yiling Zhang Weikang Jiang Herwig Peters Nicole Kessissoglou

ABSTRCT Prediction of the vibro-acoustic responses of fluid-loaded cylindrical shells is important for underwater vehicles. In this work, a number of analytical and numerical approaches to predict the radiated sound power of a fluid-loaded cylindrical shell are compared. In the first approach, an analytical methodology is used whereby the equations of motion for the cylindrical shell are solved...

Journal: :J. Nonlinear Science 2005
Eva Kanso Jerrold E. Marsden Clarence W. Rowley Juan B. Melli-Huber

This paper is concerned with modeling the dynamics of N articulated solid bodies submerged in an ideal fluid. The model is used to analyze the locomotion of aquatic animals due to the coupling between their shape changes and the fluid dynamics in their environment. The equations of motion are obtained by making use of a two-stage reduction process which leads to significant mathematical and com...

Journal: :Math. Comput. 2017
Markus Aurada Michael Feischl Thomas Führer Michael Karkulik Jens Markus Melenk Dirk Praetorius

We prove local inverse-type estimates for the four non-local boundary integral operators associated with the Laplace operator on a bounded Lipschitz domain Ω in R for d ≥ 2 with piecewise smooth boundary. For piecewise polynomial ansatz spaces and d ∈ {2, 3}, the inverse estimates are explicit in both the local mesh width and the approximation order. An application to efficiency estimates in a ...

Journal: :SIAM J. Scientific Computing 2004
Leonard J. Gray A. V. Phan T. Kaplan

In boundary element analysis, first order function derivatives, e.g., boundary potential gradient or stress tensor, can be accurately computed by evaluating the hypersingular integral equation for these quantities. However, this approach requires a complete integration over the boundary and is therefore computationally quite expensive. Herein it is shown that this method can be significantly si...

2001
MASSIMO GUIGGIANI

In this paper several methods of dealing with Cauchy Principal Value integrals in advanced boundary element methods are discussed and compared. An attempt is made to present a comprehensive description of these methods in a unified, systematic manner. It is shown that the methods can be grouped into two basic approaches, the (more classical) indirect approach, such as the rigid-body motion tech...

2003
Heather M. Savage Michele L. Cooke

The inference of fault geometry from suprajacent fold shape relies on consistent and verified forward models of fault-cored folds, e.g. suites of models with differing fault boundary conditions demonstrate the range of possible folding. Results of kinematic (fault-parallel flow) and mechanical (boundary element method) models are compared to ascertain differences in the way the two methods simu...

2001
NICHOLAS F. CAMPAGNA

The unrivaled combination of speed, accuracy, and ease of use make CAE software that employs the BEM ideally suited for analyses involving shielding of MRI and NMR systems.

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