A QSFDI based Laplacian discretisation for modelling wave-structure interaction using ISPH

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.

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An overlapping domain decomposition based near-far field coupling method for wave structure interaction simulations

Coastal Engineering ◽

10.1016/j.coastaleng.2017.04.009 ◽

2017 ◽

Vol 126 ◽

pp. 37-50 ◽

Cited By ~ 6

Author(s):

Xin Lu ◽

Dominic Denver John Chandar ◽

Yu Chen ◽

Jing Lou

Keyword(s):

Domain Decomposition ◽

Wave Structure ◽

Coupling Method ◽

Far Field ◽

Structure Interaction ◽

Field Coupling ◽

Overlapping Domain Decomposition ◽

Wave Structure Interaction

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

Volume 6: Nick Newman Symposium on Marine Hydrodynamics; Yoshida and Maeda Special Symposium on Ocean Space Utilization; Special Symposium on Offshore Renewable Energy ◽

10.1115/omae2008-57384 ◽

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.

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