... as a example floating body and the CPU time & the accuracy of the three methods were compared by calculating bending & torsion stresses of the container hull in regular & irregular waves in time domain. asia government accuracy elastic mode radiation force calculation torsion stress...

... of the semi-analytical method of eigenfunction expansion and boundary matching and the multi-degree-of-freedom vibration theory. The results show that the opening radius of the damping plate will reduce the wave excitation force on the float. The float, the damping plate and the coupling radiation force...

... by defining them as beam or truss elements. The radiation force on the buoy is transformed from frequency to time domain by state space method and implemented in the commercial software by defining a user element. For the fish net, ABAQUS has quite significant superiority in considering its nonlinear...

... of pitch led to even worse performance than was predicted in the linear model, particularly at low wave frequencies. It was found that the nonlinear radiation forces, generated by the combined surge-pitch oscillations, were the cause for the difference between results. INTRODUCTION Ocean waves...

... ABSTRACT Within the ocean engineering literature, and, particularly, within the wave energy research and hydrodynamic fields, different methods can be found that aim to identify a finite-order parametric model to represent the radiation force convolution term of the well-known Cummins...

.... time history calculation radiation force vertical shear force matrix midship frequency ship irregular wave marine transportation artificial intelligence nonlinearity experimental record statistical analysis elevation statistics sea state wave load Nonlinear Wave Loads' Prediction...

... ABSTRACT A higher-order BEM (boundary element method) for seakeeping problems in the frame of linear potential theory is newly developed to predict radiation forces of a modified Wigley hull with forward speed. In this 3-D time domain approach, a rectangular computational domain moving...

... of the 2D hull section. The numerical method based on the the open source libraries of OpenFOAM, is used to evaluate the two dimensional radiation forces and the hydrodynamic coefficients of three different cross sections, representative of a monohull, a catamaran and a SWATH and it is validated against...

..., 2012 Copyright © 2012 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-94 4 (Set); ISSN 1098-6189 (Set) www.isope.org tftftftf hsrexhy 2 where fex is the excitation force caused by wave action on the fixed absorber fr is the radiation force caused by the motion...

.... However, hydrodynamic forces such as the added-mass and damping coefficients in the radiation problem have not been validated. Recently we carried out the forced oscillation tests in heave and pitch using a newly-constructed apparatus, which provided reliable data on the radiation forces. Thus...

... loading is consistently transfered to the FEM model. In this approach the hydrodynamic boundary value problem (BVP) is solved using the hydrodynamic mesh, but interpolation is avoided by integrating the potentials over the FEM mesh. radiation force structural model time domain equation fem mesh...

... upstream oil & gas equation wave energy converter renewable energy turbine bbdb radiation force initial-boundary-value problem body surface free surface air chamber ocean energy system simulation external free surface backward bent duct buoy air pressure frequency domain...

... of the radiation problem. We divide the domain into two different grids; one is a moving grid system and the other is a fixed grid system. The moving grid is employed the body fitted coordinate system and moves with the body. This numerical method is applied to calculation of the radiation forces generated...