A non-linear wave decomposition model for efficient wave–structure interaction. Part A: Formulation, validations and analysis

2014 ◽  
Vol 257 ◽  
pp. 863-883 ◽  
Author(s):  
Guillaume Ducrozet ◽  
Allan P. Engsig-Karup ◽  
Harry B. Bingham ◽  
Pierre Ferrant
Keyword(s):  
Wave Structure ◽  
Linear Wave ◽  
Structure Interaction ◽  
Decomposition Model ◽  
Non Linear ◽  
Wave Decomposition ◽  
Wave Structure Interaction

Study of Wave Structure Interaction Based on the SPH and FCBI Algorithm

2013 ◽  
Vol 405-408 ◽  
pp. 1390-1393
Author(s):  
Lang Huan Yuan ◽  
Feng Zhu ◽  
Ying Geng ◽  
Bo Fang
Keyword(s):  
Wave Structure ◽  
Wave Theory ◽  
Wave Force ◽  
Linear Wave ◽  
Structure Interaction ◽  
Linear Characteristic ◽  
Fluid Boundary ◽  
The Difference ◽  
Sph Algorithm ◽  
Wave Structure Interaction

Abstract. Based on the theory of numerical calculation, the SPH algorithm and FCBI algorithm were used to establish the corresponding water body model, and to calculate the fluctuations of the water by controlling water boundary parameters. In addition, the dam model was established based on the finite element method, and correspondingly two-way coupling with these two fluid boundary in order to examine the effect of fluid structure interaction by these two algorithms. The calculated results show that: the wave shape generated by this two algorithms is broadly consistent, however, the results obtained by the SPH algorithm can more completely show details; In addition, wave structure interaction effect calculated by SPH algorithm is stronger than the ones derived from FCBI algorithm, with the non-linear characteristic of the wave increase, the difference of the two algorithms is increasing. The the wave force calculated by the traditional linear wave theory needs some correction.

An Overset Grid Approach to Linear Wave-Structure Interaction

2012 ◽  
Author(s):  
Robert W. Read ◽  
Harry B. Bingham
Keyword(s):  
Wave Structure ◽  
The Body ◽  
Floating Body ◽  
Linear Wave ◽  
Arbitrary Form ◽  
Structure Interaction ◽  
Grid Approach ◽  
Wave Structure Interaction ◽  
Body Response ◽  
Good Agreement

A finite-difference based approach to wave-structure interaction is reported that employs the overset approach to grid generation. A two-dimensional code that utilizes the Overture C++ library has been developed to solve the linear radiation problem for a floating body of arbitrary form. This software implementation has been validated by performing time-domain simulations to evaluate the dynamic forces applied to a half-submerged cylinder and a rectangular barge in response to a prescribed motion. A Gaussian displacement is used to introduce a range of wave frequencies, thereby allowing the measurement of the body response over the frequency range of interest. The radiation added-mass and damping coefficients of both bodies have been evaluated and compared to exact analytical solutions. The numerical and analytical results show good agreement when the modes of excitation and response are the same. The cross-coupled results are in qualitative agreement, but show some quantitative variations that may be related to slight differences in the fluid domain geometry. For both the cylinder and the barge, the effects of bottom slope on the coefficients are found to be minimal.

scholarly journals Investigation of a Stochastic Inverse Method to Estimate an External Force: Applications to a Wave-Structure Interaction

2012 ◽  
Vol 2012 ◽  
pp. 1-25 ◽  
Author(s):  
S. L. Han ◽  
Takeshi Kinoshita
Keyword(s):  
External Force ◽  
Inverse Method ◽  
Inverse Function ◽  
Wave Structure ◽  
Dynamic Responses ◽  
Structure Interaction ◽  
External Forces ◽  
Interaction Problem ◽  
Wave Structure Interaction

The determination of an external force is a very important task for the purpose of control, monitoring, and analysis of damages on structural system. This paper studies a stochastic inverse method that can be used for determining external forces acting on a nonlinear vibrating system. For the purpose of estimation, a stochastic inverse function is formulated to link an unknown external force to an observable quantity. The external force is then estimated from measurements of dynamic responses through the formulated stochastic inverse model. The applicability of the proposed method was verified with numerical examples and laboratory tests concerning the wave-structure interaction problem. The results showed that the proposed method is reliable to estimate the external force acting on a nonlinear system.

scholarly journals Efficient Solution of the 3D Laplace Problem for Nonlinear Wave-Structure Interaction

2008 ◽  
Author(s):  
Harry B. Bingham ◽  
Allan P. Engsig-Karup
Keyword(s):  
Nonlinear Wave ◽  
Efficient Solution ◽  
Wave Structure ◽  
Finite Difference Schemes ◽  
Surface Boundary ◽  
Computational Domain ◽  
Problem Size ◽  
Structure Interaction ◽  
Nonlinear Wave Structure ◽  
Wave Structure Interaction

This contribution presents our recent progress on developing an efficient solution for fully nonlinear wave-structure interaction. The approach is to solve directly the three-dimensional (3D) potential flow problem. The time evolution of the wave field is captured by integrating the free-surface boundary conditions using a fourth-order Runge-Kutta scheme. A coordinate-transformation is employed to obtain a time-constant spatial computational domain which is discretized using arbitrary-order finite difference schemes on a grid with one stretching in each coordinate direction. The resultant linear system of equations is solved by the GMRES iterative method, preconditioned using a multigrid solution to the linearized, lowest-order version of the matrix. The computational effort and required memory use are shown to scale linearly with increasing problem size (total number of grid points). Preliminary examples of nonlinear wave interaction with variable bottom bathymetry and simple bottom mounted structures are given.

scholarly journals Wave–structure interaction in hybrid wave farms

2018 ◽  
Vol 83 ◽  
pp. 386-412 ◽  
Author(s):  
Siming Zheng ◽  
Yongliang Zhang ◽  
Gregorio Iglesias
Keyword(s):  
Wave Structure ◽  
Hybrid Wave ◽  
Structure Interaction ◽  
Wave Structure Interaction
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