... ABSTRACT During the deployment of open-frame remotely operated underwater vehicles (ROVs), the influence of waves can produce large-scale movement in the ROVs that may break or damage the umbilical cable. This paper investigates the forced water entry and lifting water entry of ROVs using...

... with symmetric slamming, the prediction of asymmetric slamming load is more challenging due to the influence of ship roll and wave direction. Some studies on the asymmetric slamming problem have been done. Iafrati (2000) directly solved the velocity potential and its derivative in the water entry problem...

... modeling & simulation trimaran engineering trimaran model slamming pressure finite element method main hull profile china government history water entry actual trimaran flow field asia government structural response wet deck initial velocity experimental result accuracy...

... on the basis of the plate approximation. reservoir simulation impact pressure structural deformation high-speed water entry artificial intelligence solver precice europe government deformation mesh peak impact pressure germany government wedge water entry cfd-fem method time history curve...

... ABSTRACT The hydrodynamic performance of lifeboats is critical for the safety of passengers since several complex fluid-structure interaction phenomena could occur during the water entry phase. This paper, within a fully 3D Smoothed Particle Hydrodynamics (SPH) framework, is dedicated...

... inclination angle lateral load wedge-shaped body different initial speed simulation upstream oil & gas water surface different inclination angle water entry positive peak value wedge initial speed equation vertical load oblique free entry peak value time history torque...

... ABSTRACT In this paper, low-speed water entry of four projectiles with various head types is numerically studied by using an improved multiphase moving particle semi-implicit (MPS) method. The projectiles are composed of a solid circular cylinder with L/D = 4.5 and different head shapes...

... Abstract This paper studies the slamming responses of a wedge structure for the water entry problem. One steel wedge with stiffened panels with a deadrise angle of 45 degrees and a series of free-drop model tests were carried out. An explicit finite element code is applied to simulate...

... 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...

... was considered as an important case for tsunami studies. The compressibility of water. In order to reduce the computational cost, an water entry of a sphere-like asteroid with different impact angle is Adaptive Particle Refinement (APR) is adopted, the diameter of simulated using a three-dimensional Weak...

... 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...

... Abstract When a ship sails in a hostile sea, it is hard to avoid slamming pressure. In this paper, the slicing theory and MPS method are combined to study the impact pressure during water entry. Firstly, the effectiveness of the in-house solver MPS-SJTU is verified by a water-entry test...

... ABSTRACT The open source CFD library OpenFOAM is used to simulate the process of the crane lifting cargo into the water. In this paper, overset mesh strategy and the overInterDyMFoam solver are used to solve the process of two-dimensional water entry of a wedge. Firstly, the pressure...

... are solved, the solid body is considered as the third phase so that wave-body interactions are considered as three-phase problems. Local Mesh Refinement (LMR) grid is adopted to reduce the computational cost. Benchmark cases of water entry and exit of a circular cylinder, as well as the radiation of a box...

... ABSTRACT The problem of water entry of a rigid body with low deadrise angle is numerically simulated by means of computational fluid dynamics. The Reynolds averaged Navier-Stokes equations are employed to simulate the water and the air. The profile of the static water surface would be deformed...

..., the approach maintains high order accuracy while suppressing spurious oscillations near discontinuity or sharp gradient regions. Water entry simulations of differently shaped rigid-body including multi-body are presented for immersed moving boundary problems, which are the representatives of the nonlinear...

... as one key part of safety performances of an airplane. Theoretically, the relevant study on water ditching is essentially one problem involving a water entry, which is very difficult due to strongly nonlinear feature, e.g. a free-surface. In this paper, an in-house developed nonlinear LES (large eddy...

... entry and exit has very useful value of engineering application in the area of exploitation of marine resources, transportation in ocean and marine engineering, a lot of scholars have carried out theoretical and experimental researches on it. Most of the previous research work is confined to water entry...

... in their numerical results when this influence was taken into account, capturing accurately negative displacements. There- fore we can expect a general improvement in our results by considering the influence of the gate. Fig. 10 Wedge water entry: computational domain. SI units. WATER ENTRY OF RIGID AND ELASTIC...

... ABSTRACT In this paper, the water entry problem of free-falling twin wedges is studied based on an in-house code, named a Constrained Interpolation Profile (ClP)-based model in Zhejiang University (CIP-ZJU). The model is built on a Cartesian grid system and governed by the incompressible...