... different way, most designs are only able to extract energy from a single direction of motion which could limit their effectiveness. Waves cause motion over six degrees of freedom (heave, pitch, surge, roll, sway and yaw) and as such, a device that can operate over multiple-axes should be able to generate...

... safety implications. This article employs a Computational Fluid Dynamics (CFD) methodology based on the resolution of Reynolds-Averaged Navier-Stokes (RANS) equations to simulate the six degrees of freedom (6DOFs) motion response of a buoy at sea. The discourse places particular emphasis...

... linear operator, and 01, 2, is an initial guess of 1, 2, . 0 is the so-called convergence-control parameter without physical meaning, respectively. Here, , 1, 2 correspond to the unknown 1, 2, respectively. It should be emphasized that we have great freedom to choose the auxiliary linear operator...

... sustainability china government wind energy social responsibility sustainable development amplitude frequency united states government wind turbine turbine motion response wave load freedom turbine system asia government sub-sea system platform wind speed wind load surge...

... social responsibility sub-sea system upstream oil & gas europe government sustainable development experimental data hull sustainability coefficient wind energy freedom drag coefficient openfast model parametric study second-order response volturnus hull pf model united...

... detects changes in the hull motion in six degrees of freedom. In the frequency domain, the motion response of a scaled model of a damaged very large crude oil carrier (VLCC) in regular waves with the same wave height and different wave directions is simulated and studied. The nonlinear coupled motion...

... ABSTRACT To investigate the effect of vertical degree of freedom on hydrodynamic resonance of twin identical floating-body, a two-dimensional incompressible viscous-flow numerical wave tank is set up based on a CIP (Constrained Interpolation Profile) method. Firstly, a twin floating-body model...

.... In particular, a mechanism called Stewart-platform (D. Stewart, 1965), in which the base plate and the top plate are connected by six linear actuators is used. Since the upper plate of the mechanism has six degrees of freedom, it is possible to maintain the position and attitude of the upper plate for all...

... response amplitude single equivalent regular wave approach regular wave approach spectral model upstream oil & gas floating production system fpso simulation frequency procedure regular wave freedom irregular seastate Generation of Multiple Equivalent Regular Waves for Preliminary...

... mooring line has on the maximum tension of mooring line. incident angle subsea system maximum tension motion response multi-point moored fpso typhoon condition wave period total length upstream oil & gas freedom characteristic different typhoon condition time domain incident angle...

... Abstract An analytical approximate approach for determining periodic solutions and identifying parametrically nonlinearity of sheltered riser vessel (SRV) motion equations involving three degrees of freedom is investigated. The cubic stiffness and square damping involved nonlinearity...

... and inertia, thereby increasing the vessel excitation, particularly, for the roll degree of freedom. Overall, it is concluded that the riser system design for this specialized ship conversion is considered to be feasible, regardless of the variations in the input data. hydrodynamic analysis td...

... ABSTRACT The vibration mechanism and phenomenon of two cylinder's VIV are more complicated than those of single cylinders as a result of the interaction between the cylinders. The paper designed a set of two cylinders with two degrees of freedom and experimental set of VIV models. A series...

... for the response level corresponding to each degree of freedom. Quantification of the performance risk is based on a Monte Carlo simulation technique. The numerical analysis of the free floating structure is carried out using a three dimensional hydrodynamic analysis. Several cases of different combinations...

... previously proposed idealized explicit FEM (IEFEM) to achieve shorter computing time and lower memory consumption. Since IEFEM is based on dynamic explicit FEM, it is possible to perform the calculation for each degree of freedom (DOF) and element independently. Then, in this study, we developed parallelized...

... in welding simulations. However, these analyses have very large computing time and memory consumption that are proportional to the square or cube of the number of degrees of freedom of the analysis model. To accomplish smaller computing time and memory consumption for thermal elastic plastic analysis, we...

... especially for high plate slenderness ratios will be discussed. To embed ISUM in a commercial finite element software package the degrees of freedom have to be reduced to nodal degrees of freedom. Therefore the internal degrees of freedom are condensed out before the iterative solution of governing equations...

... al 1999, Luo et al 2001, Wang et al 2002). Spar platform has six degrees of freedom. However, the dominant motions are only three; i.e., surge, heave and pitch. It has natural frequencies of motions far below the dominant ocean exciting wave forces frequencies; this is due to its large mass...

... Effect of Rotational Degree of Freedom on Vortex-Induced Vibrations of a circular cylinder in Cross-Flow Stéphane Etienne a , Emmanuel Fontaine b a Mechanical Engineering Department, Ecole Polytechnique de Montreal, Montreal, Canada b Amog Consulting, Melbourne, Australia ABSTRACT Vortex-Induced...

...), the material and geometrical nonlinearities are idealized and considered in the element formulation. A large structural unit can be regarded as one element so that the total degrees of freedom can be reduced significantly and so as the computational time. Thus, it can be applied to progressive collapse...