... of entrapped air. impact pressure variation spatial variation time step upstream oil & gas wave impact pontoon reservoir simulation pontoon height coefficient impact load higher position maximum impact pressure impact velocity engineering pontoon length square column numerical model...

... immergence of the semi-submersible platform, the impact velocity will be provided for structure analysis. For prototype analysis, the load cases tabulated in Table 8 for dry transportation are simulated with AQWA numerical code. For water immergence analysis, the air gap enhancements are derived from...

... of impact velocity and impact load. In this paper, the hydrodynamic interaction between ice floe and fixed cylinder is studied experimentally and numerically. In the experiment, the ice floe is driven by uniform flow, and Qualisys optical 3D motion capture camera, acceleration sensor, and impact force...

... to obtain the nonlinear static relationships between crush force and depth of ship-bow. In combination with static and dynamic deformation energy under various impact velocities, the dynamic crush stiffness is taken account into ship-bow stiffness during the collisions. In addition, a 2-DOF simplified...

... it from impacting damage. soil part pipeline gravity anchor impact impact point dent depth pipeline damage anchor midstream oil & gas submarine pipeline proceedings international ocean offshore pipeline polar engineering conference impact velocity beam element thirty-first...

... tension, gravity and air cushion was ignored. Greenhow (1987) considered the influence of gravity on the flow field and used the Boundary Element Method (BEM) to solve the problem of the self-similar flow field. reservoir characterization wedge model stiffener peak pressure impact velocity...

... Abstract The oblique water entry of a cylinder is investigated experimentally in the present study. The cylinder is driven by a computer-controlled linear motor to ensure the constant impact velocity during the water entry process. To investigate the influence of wave on the impact loads...

... Abstract An experimental study of the cavity evolution during the oblique water entry of a slender axisymmetric body in progressive waves is presented. The projectile, with a flat headform, is driven by a computer-controlled linear motor to ensure a constant impact velocity during the oblique...

... or partial coalescence between droplet and liquid surface. At low impact velocity, an air layer will form between the droplet and liquid surface, Thoroddsen et al. (2012) studied the rupture of this very thin air layer and analyzed time evolution and spatial distribution of micro-bubbles caused...

... impact velocity In the process of offshore working, payloads of offshore cranes may suffer from flow disturbances. In this work, OpenFOAM is used to simulate the interaction between payloads and the ocean flow after it enters water. Firstly, two-dimensional model of flow around cylinder at a low...

... in the bow structure. For different ship impact velocities and impact masses, the dynamic impact results are compared with the experimental static crushing results. It is observed that for realistic velocities and masses the crushing forces and energy absorption of the bulbous bow structure is increased...

... al., 2003). hull production monitoring production control simulation force peak flow visualisation wetdeck computed result catamaran impact velocity empirical formulae flow behaviour parent centrebow investigation upstream oil & gas parent hull grid centrebow ranmuthugala...

... the proposed methodology and d p values are derived for a range of values of relevant parameters (i.e., mass, diameter and impact velocity of the penetrometer and shear strength of soil). This methodology can be used to select optimal values of test parameters for achieving a desired depth of penetration...

... wedge flat rigid body fluid mechanics expansion impact force coefficient flat body numerical simulation water entry deadrise angle water surface oblique water entry rigid body experiment impact velocity free surface Air-cushion and Impact Force Coefficient with the Water Entry...

... with low velocity. Different impact velocities are obtained by changing the height of falling hammer. The core damage failure modes, impact depths and impact forces are also discussed. The experimental results could be used to calibrate the FE modelling. INTRODUCTION The corrugated sandwich structure...

... of the pipeline, and dragging the pipeline along by a dropped anchor. The pipeline damage incurred by impact of the dropped object depends on various parameters and conditions. The relative contributions of mass and impact velocity of the dropped object, the pipeline content and the soil condition...

... of offshore oil and gas. impact velocity finite element model resistance numerical simulation anchor increase experimental condition anchor penetration depth submarine pipeline anchor penetration depth variation material parameter hall anchor anchor weight cohesion water depth upstream...

... ABSTRACT The water-entry of 2D circular cylinder at high impact velocity is studied numerically. The flow model treats the fluid as a compressible mixture of air and water with homogeneous material properties. High- resolution Godunov-type method is employed to solve the governing equations...

... to explore the effect of impact velocity on the final embedment depth. INTRODUCTION Recently introduced dynamically installed anchors (DIAs) have been regarded as a cost-effective anchoring solution for floating structures in deep waters. They are usually rocket shaped equipped with three or four fins...

... at low temperature were experimentally investigated by using the drop tower with thermostatic test chamber. Experimental results showed that the impact forces and deflections of AFSPs increased proportionately with the increase of impact velocities. The increments of the deflection of the front-face...