... Abstract An iceberg drift model was developed for offshore oil and gas operations. Increasing forecasting accuracy is critical for making appropriate downtime decisions. Three sources of ocean current data were used to run test simulations of the model: estimated from observed iceberg drift...

... currents is established based on the electronic chart data of the S-57 standard. Then proposes a global path planning method for large-scale under-driven AUV based on an improved evolutionary algorithm. Considering the influence of ocean currents, the improved algorithm can more quickly find a safe...

... ABSTRACT Straight line path following of the underactuated ONR Tumblehome ship in the presence of ocean currents is studied. The MMG model is used to simulate the motion of the vehicle, a linearized model is constructed for controller design. A guidance strategy combining the Line-of-Sight...

... the underwater vehicle sailing. In addition, many studies have considered the impact of ocean current on the path planning of underwater vehicles. Zeng (2016) introduced Quantum-behaved Particle Swarm Optimization (QPSO) to solve the optimal path planning of Autonomous Underwater Vehicle (AUV) operating in ocean...

... the fate of CO 2 seeping from a seabed off Japan with the modified MEC (Marine Environment Committee) Ocean model considering tidal ocean currents. upstream oil & gas moderate case interpolation calculation equation ocean current effect numerical simulation ocean current co 2 reservoir...

... Abstract In this paper a lumped-mass method is adopted to develop a dynamic nonlinear model for an offshore pipeline installation. The influences of ocean currents and vessel speed are taken into account in the model. The accuracy of the model is validated by comparing the results obtained...

... Abstract REMUS autonomous underwater vehicles (AUV) are widely used in the ocean engineering community. However, few studies have been conducted to investigate its nonlinear dynamical behavior in irrotational ocean currents. In the present study, we begin by introducing the nonlinear equations...

... in a surf zone. A force allocation function allows the rudders to move independently to overcome the vehicle's underactuation. With morphing rudders and fixed thruster, it was shown that path keeping and station keeping could be achieved for a given unsteady current. rudder simulation ocean current...

... lagrangian sediment transport model into three dimensional ocean hydrodynamics using non-orthogonal boundary fitted technique in spherical coordinate (Muin, 1993; Muin and Spaulding, 1997a, 1997b, 1998). The model uses multi-class sediment and three dimensional oceans current to obtain accurate results...

... the general dynamics of the bubble curtain but a more rigorous treatment of the free surface and the bubble size model will be required to capture quantitative trends. chemical spill bubble size line source computational fluid dynamic boundary condition ocean current upstream oil & gas...

... strength evaluation ocean current ship motion evaluation drilling data nishigaki drill string earthquake drill pipe drilling fluid management & disposal jfast Fatigue Strength Evaluation of Drill Pipe for Challenging Deep Drilling Project - Japan Trench Fast Drilling (JFAST) Tomoya Inoue1...

... to be affected strongly by leeway. simulation trajectory panel show fishing vessel offshore region pacific research center velocity vector velocity component container experiment vector leeway effect surface ekman flow ocean current passage time climatology data north pacific canadian...

... ABSTRACT A prototype of ocean current induced rotating magnetic electric generator was developed. The power generation system is designed to solve the problem of the subsurface buoy's power supplement. A test bed was established to investigate the working performances. The time history...

... topography ice bottom topography standard deviation bottom topography subinterval kioka ice draft sea ice hokkaido roughness ocean current significant amplitude draft depth Characteristics of Ice Bottom Topography from the Sea of Okhotsk off Hokkaido - Observation Results in 2007 - Shinji...

... and the target of the government is 3000MW in 2010. Since the density of water is 800 times greater than air density and the power of the flow is proportional to cubic of the fluid, the power of ocean current of 2 knots is equal to the wind flow of 9m/s. pier utilization ocean energy ikitsuki bridge...

... was employed recently to evaluate the performance of three different sea cache configurations of rectangular, sharp-edged, and round-edged shapes under strong ocean currents and the round-edged sea cache was found to provide the most desirable overall hydrodynamic performance. In the present study, the method...

..., the quantitative comparison of tidal current with residual current and the relation between the residual current and the winds. Wind effects on the water flux at the observation point are also discussed. INTRODUCTION Ocean current is one of the most fundamental quantities in the ocean environment, because...

... ABSTRACT A model for riser displacements generated by ocean currents is derived, for the case where the riser is cylindrical with uniform material properties in the axial direction. The current forces are assumed to be proportional to the square of the speed and account for changes due...

... an important role to obtain synoptic information about current regimes over larger areas, which is complementary to standard buoy measurements at fixed locations and model simulations. KEY WORDS: ocean currents, eddies, satellite data, offshore exploration INTRODUCTION The offshore petroleum exploration...

... design. INTRODUCTION The ocean current environment is one of the most uncertain factors in assessing loading and safety design of pipelines and offshore structures. Laboratory model simulations have often paved the way for choosing and developing the proper strategy for field measurements...