... upstream oil & gas pipe production control multiphase flow reservoir surveillance critical velocity frequency fluid dynamics production logging production monitoring concentration particle size equation characteristic complex frequency vibration slip velocity asia government...

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... with different molecular weights. The experiments were carried out using an RTEC tribo-tester, with friction and vibration tests conducted under varying speeds, loads, and materials. The results demonstrated that as the load and speed increase within a specific range, the lubricated status of the bearing...

... marine transportation calculation impact force vibration boundary element method equation element model flexible body passenger transportation excitation element method coefficient deformation impact noise ship cabin hammer numerical prediction model virtual modal method iso...

... increase as the drafts increase. INTRODUCTION Flow-induced vibration typically arises as a result of vortex shedding. The vibration is called vortex induced motion (VIM) for large-volume floating platforms, and vortex-induced vibration (VIV) for the long slender cylindrical structures such as risers...

... to the collapse as the member forces were significantly lower than the design value. The measured wind data revealed a severe anomaly in the instantaneous maximum wind speeds caused by vortex-induced vibration of the tower, which persisted for four hours, leading to fatigue failure in the joint bolts...

... black hole imaginary part metamaterial effectiveness vibration specimen Proceedings of the Thirty-third (2023) International Ocean and Polar Engineering Conference Ottawa, Canada, June 19-23, 2023 Copyright © 2023 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1...

... ABSTRACT Focusing on the fact that rocking vibration is dominant in structures with rectangular cross-sections, we proposed a method to identify the natural frequencies of structures with high accuracy. We conducted a series of tests on a model caisson-type breakwater to investigate...

... the PFS method had been applied (Otani, 2017). upstream oil & gas displacement japan government structural geology plate tectonics asia government numerical analysis underground structure embankment settlement vibration liquefaction initial effective stress vertical displacement...

... ABSTRACT The acoustic stealth and vibration performance of solid-core composite rudder with damping materials has been studied and discussed in this paper. The simulating models of composite rudder and steel rudder for calculating the target strength ( TS ) are built and the TS distribution...

... viv china government canada government vibration amplitude boundary condition ABSTRACT This paper described a hybrid method to assess large diameter spool VIV and FIV, and applied it to a 36" complex-shape spool study. The hybrid method employs empirical lift coefficients, and imposes...

.... The sensitivity analysis revealed that water depth has little effect on interference, and the minimum clearance is more sensitive to top tension and platform offset. Larger top tension tends to reduce the vibration amplitude and plays a positive role in avoiding the interference. INTRODUCTION X oilfield...

...) for that of the structure field. It shows that the main vibration frequency of the rudder is consistent with the shedding frequency of the cloudy cavitation. Compared with the rigid rudder, the flexible rudder affects the shedding frequency of the cavitation and the total vapor volume, showing strong unsteady behavior...

... ABSTRACT Prediction of vortex-induced vibration (VIV) in fluid dynamics has been challenging due to its strong nonlinearity. Nonlinear resonance and non-linear dissipation occur during VIV, which makes the response data collected highly nonlinear. The response of VIV is influenced by the flow...

... not regarded as severe before. It is of great importance to estimate the wave and vibration induced loads of ships accurately. In the present work, a fluid-structure interaction (FSI) method is developed based on CFD-FEM method to predict the hydroelastic response of a 20000TEU container ship in waves. Fluid...

... ABSTRACT We show how to reconstruct the vortex-induced vibrations of a riser from experimental strain measurements using a machine learning framework. We employ a modal decomposition technique followed by inference of the expansion modes using a two-stage optimization routine. A stochastic...

... ABSTRACT Vortex-induced vibration (VIV) is prone to be induced along marine pipelines under the influence of ocean currents, leading to fatigue damage. In this paper, a comparative study of the VIV response in relation to airfoil, textured and smooth pipes is carried out using the CFD method...

... ABSTRACT The flow-induced vibration (FIV) of a cylinder cluster is often observed in subsea pipelines, marine risers and high-voltage transmission lines et al. In previous studies, the motion of the cylinder clusters was often modeled as the equation of motion of a particle, which has ignored...

... ABSTRACT Vortex-induced vibration of marine risers has been extensively studied due to its importance in offshore engineering. The van der Pol nonlinear wake oscillator has been widely used to model the fluid-structure interaction between the oscillating riser and the time-varying hydrodynamic...

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