... response of closed cages and may potentially damage the cage structure. More-over, the liquid sloshing in floating cages exposed to waves can be quite different in comparison to sloshing due to forced harmonic motions. In this paper, the coupling between external wave hydrodynamics, nonlinear internal...

... ABSTRACT As one of the ways to obtain ocean current energy, vortex-induced vibration (VIV) can utilize the power of ocean currents at lower velocities. In this study, the error between simulation and experiment is improved by introducing a nonlinear damping term in the simulation, which...

... ABSTRACT In this paper, we use the multiple scale Trefftz method (MSTM) combined with the Lie group scheme to simulate the two-dimensional nonlinear sloshing problem. When considering the effects of baffles for the nonlinear sloshing phenomena, the conventional Trefftz method (CTM) may...

... ABSTRACT This paper aims to suggest more accurate global time domain analysis of flexible risers and to investigate the effect of nonlinear bending model on global analysis results. The suggested global time domain analysis procedure, unlike to the previous studies, preliminarily estimate...

... Estimation of flow speed around submerged rigid circular cylinder based on its vortex-induced vibration and nonlinear filtering theory Yoshiki Nishi, Yosuke Toyoda, and Yoshihiro Moriya Department of Systems Design for Ocean-Space, Faculty of Engineering, Yokohama National University Yokohama...

... ABSTRACT This paper presents the performance assessment of pitch-type wave energy converter (WEC) rotor due to nonlinear viscous damping obtained from the free decay tests conducted in computation fluid dynamics (CFD). The nonlinear damping moment is obtained by energy method (Bass and Haddara...

... reservoir simulation mstm esgl free oscillation euclidean space matrix tank application lie-group scheme literature value problem eng anal oscillation t-complete function trefftz method equation accuracy mstm isgl numerical method nonlinear ABSTRACT An equal norm...

... of analytical computation and the general application field of FEMs, keeping the approach and implementation simple. In this paper the hanging mooring line is modeled as a nonlinear extensible elastic string handling only traction along the centerline. The two point boundary value problem (TPBVP) static...

... nonlinear loading formulation resistance support structure turbine long-term cyclic loading Abstract Lowering the cost for offshore wind energy remains a major challenge. Increasing the accuracy of analysis tools used in the design and optimization process can strengthen the reliability...

... his entire work for wave theory publications. sftsyseq nonlinear water elevation water depth cfd analysis application coefficient subsea system engineering fenton current study wave kinematic equation calculation cfd model sft horizontal velocity wave height stream function...

... Abstract Roll motion is a major concern of ship and offshore operators because it has a direct impact on the boarding comfort of crews, downtime of the process plant and structural integrity of the hull and appurtenance system. Nevertheless, the nonlinear effects involved in the roll motion...

... vibration is nonlinear, and the numerical simulations based on linear theory cannot provide accurate results. Nonlinear Springing and Whipping As the Fig.9 shows, with the increase of wave frequency, the composite VBM under the speed of 14 knots has two successive peaks at the corresponding frequency...

... Abstract In this study, a numerical wave tank is developed based on commercial software package FLUENT. Velocity inlet method is applied to simulate nonlinear wave groups and compared with 1st order and 2nd order wave theories. The horizontal particle velocity of the focused wave group...

... data. forward speed wedge drop test model test numerical model matrix nonlinear time history ship frequency force sensor calculation drop test simulation time domain experimental result reservoir simulation sensor backbone equation vbm artificial intelligence numerical...

... and Technology, Daejeon, Korea ABSTRACT A nonlinear weathervaning control algorithm for offshore vessels is designed in the task space under consideration of Lyapunov stability theory. When a Dynamic Positioning (DP) offshore vessel, that is doing offshore operation such as on-loading and off-loading, drilling...

... Abstract Extreme waves have caused a lot of ship accidents and casualties in ocean. So nonlinear dynamic strength of a containership in extreme wave is studied, the dynamic ultimate strength and deformational angle at midship are paid a close attention. On one hand, traditional ultimate...

... Abstract A nonlinear energy harvester coupled to a smooth and discontinuous oscillator (SD oscillator) is proposed in this paper. This SD oscillator exhibits nonlinear dynamic performance by a pair of inclined linear elastic springs. The effects of its parameters on nonlinear response...

... correction, is the vector of excitation due to slamming. It can be noted that in Eq.6 the linear restoring matrix is removed since the change in the hydrostatic pressure is included in a nonlinear way in the Froude Krylov correction. In the present model the Froude Krylov approximation is made...

... response between tension leg platform main body and mooring system under different impact loads. The effect of three typical impact loads: sine pulse, triangular pulse and rectangular pulse were considered and the differential equation of motion was solved by self-compiling program. The effect of nonlinear...

... ABSTRACT Motion of a heavy transport vessel in waves is numerically investigated by using a method of nonlinear time-domain analysis for floating body motion. In this study, focus is made on the roll motion of the transport vessel which is significantly influenced by nonlinear wave loads...