tension-leg platform (tlp) is a vertically moored floating structure. the platform is permanently mooredby tendons. surge equation of motion of tlp is highly nonlinear because of large displacement and it should be solved with perturbation parameter in time domain. this paper compare the dynamic motion responses of a tlp in regular sea waves obtained by applying three method in time domain usin...

In this study, an unsteady aerodynamic simulation is performed to realize the influences of platform surge motion on the aerodynamic performance of a high capacity offshore floating wind turbine. A dynamic model with pitch angle control system is utilized to propose a more realistic model of wind turbine and also achieve the rated condition of the rotor. The transient effect of platform surge m...

Tension-Leg Platform (TLP) is a vertically moored floating structure. The platform is permanently mooredby tendons. Surge equation of motion of TLP is highly nonlinear because of large displacement and it should be solved with perturbation parameter in time domain. This paper compare the dynamic motion responses of a TLP in regular sea waves obtained by applying three method in time domain usin...

An analytical solution is derived to describe the wave-induced flow field and surge motion of a deformable platform structure controlled with fuzzy controllers in an oceanic environment. In the controller design procedure, a parallel distributed compensation PDC scheme is utilized to construct a global fuzzy logic controller by blending all local state feedback controllers. The Lyapunov method ...

modeling and wrench feasible workspace analysis of a spatial cable suspended robots is presented. a six-cable spatial cable robot is used the same as stewart robots. due to slow motion of the robot we suppose the motion as pseudostatic and kinetostatic modeling is performed. various workspaces are defined and the results of simulation are presented on the basis of various workspaces and applied...

The tension leg platform (TLP) is a vertically moored structure with excess buoyancy. The TLP is regarded as moored structure in horizontal plan, while inherit stiffness of fixed platform in vertical plane. In this paper, a numerical study using modified Morison equation was carried out in the time domain to investigate the influence of nonlinearities due to hydrodynamic forces and the coupling...

This paper describes a self-motion compensation technique for a near-range synthetic aperture sonar. We are developing a SBSAS (sub-bottom synthetic aperture sonar), intended for chemical ammunition exploration. Since chemical ammunition is about 20 cm diameter×70 cm length in size, and buried in the sedimentary layers, we chose a low frequency (15 kHz) and applied a synthetic aperture techniqu...

The rotor of floating offshore wind turbines with platform motions may undergo different working states during its operation, e.g. from windmill state to vortex ring and propeller state. In this paper, an aerodynamic model based on a free wake method is used simulate the undergoing surge motion. associated change evaluated quantitatively visually. results show that full cycle motion platform, e...

Platform motions induced by waves pose a challenge to accurately predict the aerodynamic performance of floating offshore wind turbines (FOWTs). In view this, power and wake structure FOWTs under platform pitch, surge, their combined were investigated in this paper, using computational fluid dynamics software, STAR-CCM+, with overset meshing rigid body motion techniques. First, simulation cases...