... vibration of two- dimensional elastically-supported cylinder at high Reynolds numbers is computed to verify the DVM model. Furthermore, the VIMs of a low- mass-ratio Spar platform and a simplified semi-submersible platform are both simulated to estimate the hydrodynamic efforts induced by different...

... strength development bo 20 relation mass ratio initial water content erosion rate strength upstream oil & gas inactive zone shear stress moderate zone hydraulic resistance property strength increment coefficient bo 30 Strength behavior and hydraulic resistance properties of dredged...

... dissipates energy mainly due to wave-breaking, hydraulic jump and slamming. All modes of sloshing can be modeled by a set of mass- spring-dashpot systems based on the following principals (Ibrahim, Pilipchuk and Ikeda, 2001): displacement good control tld tank mass ratio impact damper vibration...

... JIP), run by MARIN and University of São Paulo (USP), possible reasons for this over-prediction are investigated with model tests and CFD. The results presented herein are part of the model tests carried at MARIN, where damping, mass ratio, draft variations and sinusoidal tow velocities were put...

... Abstract This paper presents the results of six-DOF VIM (vortex-induced motion) experiments on tethered buoyancy can with the size of ϕ 20×70 cm and L/D=3.50 under conditions of different towing velocities and mass ratios. In aim to investigate the characteristics of VIM and research...

... in the x direction. SIMPLE algorithm is used to solve the Navier-Stokes equations. In the paper, we compute the lift and oscillating motion amplitude as functions of Reynolds number and time at different mass ratios. Simulations show the vortex induced vibration process of an elastically supported circular...

... performance and stability than structured-O grid in OpenFOAM dynamic solver. The effects of mass ratio, spring stiffness and damping on the motion of square cylinder are discussed. It is observed that the phase angle difference between lift coefficient and transverse motion of the cylinder is correlated...

... frequency amplitude mass ratio bottom end simulation result natural frequency dt 0 Dynamics of a Cantilevered Pipe Discharging Fluid with a Nozzle. Part 2: Three-Dimensional Dynamic Analysis and Parametric Study Shuai Meng Department of Maritime Engineering, Graduate school of Engineering, Kyushu...

... velocity for pipelines in the field condition. The effects of configuration parameters, including the spacing between the piggyback and the main pipe ( G/D ), the position angle of the piggyback to the main pipe (θ) and the mass ratio ( m *) on the vibration amplitude and frequency are investigated...

... ABSTRACT The aim of the present investigation was to examine the critical vortex-induced vibration (VIV) point for cylinders in a rotational system. For translational systems, the existence of a critical mass ratio for cylinders undergoing vortex-induced vibration has been well established...

... ABSTRACT: A flapping foil, which is free to move horizontally propelled by a nonsinusoidal plunging motion, is numerically simulated. The hydrodynamics of foil is investigated by various kinematic and structural dynamic parameters, such as the mass ratio between foil and fluid, the plunging...

... ABSTRACT The more practical case of vortex-induced vibration in two degrees of freedom has been presented. The mass ratio is low and equal to m*=1.78. The response amplitude showed three branches namely, the initial branch, the super-upper branch and the lower branch. The reason...

... the range from 10 3 to 10 4 . The mass ratio of the riser model is 1.0 Fiber optic grating strain gauges are used to measure the dynamic response of the model. The VIV response strain, vibration frequency and amplitude, displacement, and displacement standard deviation of the flexible riser model were...

... Vortex-Induced Vibration of Cylindrical Structures with Low Mass Ratio Brad Stappenbelt School of Mechanical Engineering, The University of Western Australia Perth, Western Australia, Australia Lee O Neill School of Oil and Gas Engineering, The University of Western Australia Perth, Western...

... behavior artificial intelligence batista federal university active passive control control device response amplitude absorber offshore structure reduction mass ratio passive control heave motion active control equation dynamic response displacement subsea system tlp rio de janeiro rio de...

... applications in drilling, turning, and milling are constantly emerging. particle abrasive particle garnet abrasive cavitation slurry application asj upstream oil & gas high-pressure waterjet nozzle pressure standoff distance waterjet mass ratio hashish suspension jet ambient pressure...

... effective reduction vibration mode response reduction reduction mass ratio ABSTRACT: Offshore structures provide great possibilities for the development and utilization of the resources and energy of the ocean. The environment of offshore structures is usually subjected to more severe load...

... resonance amplitude non-dimensional material experiment axial natural frequency dynamic tension inertial loading support point natural frequency frequency prediction end mass vibration effective shortening lateral vibration tension amplitude cable length cable mass ratio...

... frequency mass ratio amplitude nutation damper riser configuration application resonance excitation frequency Proceedings of the First (1991) International Offshore and Polar Engineering Conference Edinburgh, United Kingdom, 11-16 August 1991 Copyright © 1991 by The International Society...

... was analyzed theoretically. The results indicate that the abovementioned absorber attached to the buffer could almost reduce the resonance amplitudes of the buffer and pump module to almost 40% values and that larger mass of the absorber more reduces those amplitudes within the range where the mass ratio...