Freak waves can cause serious damage to offshore structures because of their characteristics high peak energy, short duration, and great contingency. In this study, the slamming pressure a typical floating wind turbine under freak are studied by numerical simulation experiment. The computational fluid dynamics (CFD) method is used establish tank. experimental test float implemented at Jiangsu U...

In case of positioning by GPS, the direct signal from the satellite to the receiver is ordinarily utilized, but the multipath signal is regarded as one error source that 81 ION GNSS 18th International Technical Meeting of the Satellite Division, 13-16 September 2005, Long Beach, CA deteriorate the positioning accuracy. In this paper, we focus on characteristics of the reflected signal, and had ...

Abstract The development is presented of an analytical model for the prediction stochastic nonlinear wave loads on support structure bottom-mounted and floating offshore wind turbines. Explicit expressions are derived time-domain frequency-domain exciting forces in a seastate with significant height comparable to diameter based fluid impulse theory. higher-order moments load evaluated from simu...

LIST OF PRINCIPAL SYMBOLS Ey Hz H h k ^-component of electric field strength, z-component of magnetic field strength. Height of aperture. Height of source slot above guiding surface. Phase constant for free space. kx = Decay constant of surface wave. V(h) = Voltage across slot at height h. x,y,z = Rectangular co-ordinates. Phase-change coefficient in ^-direction. Phase-change coefficient of sur...

The response of a reticulated, elastomeric foam filled with colloidal silica under dynamic compression is studied. Under compression beyond local strain rates on the order of 1 s 1, the non-Newtonian, colloidal silica-based fluid undergoes dramatic shear thickening and then proceeds to shear thinning. In this regime, the viscosity of the fluid is large enough that the contribution of the foam a...

A general purpose viscous flow solver Ansys CFX was used to solve the unsteady three-dimensional (3D) Reynolds Averaged Navier-Stokes Equation (RANSE) for simulating a 3D numerical viscous wave tank. A flap-type wave generator was incorporated in the computational domain to generate the desired incident waves. Authors have made effort to study the physical behaviors of Flap type wave maker with...

The study of wave and its propagation on the water surface is among significant phenomena in designing quay, marine and water structures. Therefore, in order to design structures which are exposed to direct wave forces, it is necessary to study and simulate water surface height and the wave forces on the structures body in different boundary conditions. In this study, the propagation of static ...