Research toward the development of point absorber ocean wave energy converters (WEC) is migrating from energy absorption of ocean wave heave only, to the absorption of heave and surge. Due to the additional dimension of surge, the mathematic relationship between the ocean waves and the WEC has shifted from a linear model to a nonlinear model. This change has made back driven wave height from de...

Abstract The aim of this work is to study the influence chamfered perforation and chamfering on heave pitch motion a single floating wind power platform with an anti-heave device. Firstly, hydrodynamic performance body different chamfers, or without perforation, calculated analysed. Secondly, model 35° captured studied in towing tank. results show that when wave height large period small, perfo...

We solve the problem of cargo transfer in high sea states over a ramp from a large, medium-speed, rollon/roll-off (LMSR) vessel to a smaller connector vessel of a surface effect ship (SES) type. Our aim is to reduce rampmotion between the LMSR and SES in order to provide a safer environment for cargo transfer. We design an air cushion actuated controller to estimate and cancel the wave disturba...

As an important drilling tool, the landing string will be directly exposed to seawater during surface riserless operations, and it undergo complex deformation under action of environmental loads such as ocean currents waves displacement, heave vibration platform. At same time, with increase in water depth, floating weight drill pipe casing also increases significantly, bear great tensile loads,...

Three-dimensional tank in smooth tank is of concern in various engineering applications. Sloshing waves in moving tanks have been studied numerically, theoretically and experimentally in past several decades and many significant phenomena have been considered in those studies, especially the linear and nonlinear effects of sloshing wave with inviscid or viscid liquid in a tank. The reported stu...

Floating offshore wind turbines (FOWTs) still face many challenges in improving platform stability. A fully submersible FOWT with inclined side columns is designed to tackle the current technical bottleneck of platform, combining structural characteristics semi-submersible and Spar platform. An integrated numerical model established considering coupled effect, hydrodynamic performance novel FOW...

With the increase of ship size, stiffness hull structure becomes smaller. This means that frequency wave excitation tends to be closer natural vibration, which in turn makes hydroelastic responses more significant. An accurate assessment loads and motion hulls is key design safety assessment. In this paper, coupled CFD (Computational Fluid Dynamics)-FEM (Finite Element Method) method used inves...