... instability deformation interface deformation evolution Proceedings of the Thirty-fourth (2024) International Ocean and Polar Engineering Conference Rhodes, Greece, June 16 21, 2024 Copyright © 2024 by the International Society of Offshore and Polar Engineers (ISOPE) ISBN 978-1-880653-78-4; ISSN 1098...

... ABSTRACT Ships navigating in the waves are always in motion. It is necessary to study the structural load-bearing capacity under dynamic loads to ensure safety. Taking rectangular plate as the object, the dynamic instability regions are calculated through theoretical analysis. The static...

... ABSTRACT In this study, a natural circulation experimental system is established to investigate five typical instability modes in a pipeline. Transient two-phase flow images are captured by a high-speed camera during the experiments, and the spatio-temporal feature map of the liquid level...

... leachman comparison hydrogen pipeline equation of state offshore pipeline pipeline operation thermal conductivity offshore hydrogen pipeline viscosity instability midway flow assurance dittus-boelter correlation Proceedings of the Thirty-fourth (2024) International Ocean and Polar...

... and prismatic floaters, the paper focuses on a pendulum-based device purposely designed to experience a beneficial type of parametric instability. This study specifically investigates the intensity and triggering effects of parametric resonance under regular and irregular wave conditions. It is shown...

... ABSTRACT With the rising demand and utilization of offshore oil and gas resources, seabed instability around pipelines subjected to the combined actions of the wave and currents, and the protection of the transportation pipeline against natural hazards becomes one the of the most primary...

... in pipeline leakage and instability. These issues, if not addressed, can culminate in catastrophic events(Ma et al., 2023; Tuo et al., 2022). Significant progress has been achieved in researching the dynamic behavior of pipelines conveying both single-phase and twophase flows(Ebrahimi-Mamaghani et al., 2022...

... upstream oil & gas pore water pressure geomaterial excess pore water pressure ratio water pressure monopile foundation instability shear stress rubble mound cylindrical structure wave loading sediment countermeasure excess pore water pressure movable bed surface shape...

... in this field has been the development of free surface instabilities triggered by the escaping gas shearing the interface when it approaches the wall. Indeed, the variability of measured impact pressures and the statistics on the pressure peaks depend strongly on the perturbations on the free surface (Frihat...

... and continental structures (MacKinnon et al, 2017). In terms of nonlinear wave-wave interactions, parametric subharmonic instability (PSI) is considered as one possible dissipation mechanism of the internal waves. The energy will flow from the primary wave to a pair of subharmonic waves of half the frequency...

... consisting of two alternating phases: an approximately flutter motion and a vibration similar to noise with a small amplitude. INTRODUCTION The cantilevered pipe is a novel and most challenging device in the floating structure for deep-sea mining. The internal flow causes the instability...

... a significant impact on the open water performance, vortex structures, as well as the instability of the wake evolution. In this paper, based on the Ka4-70 propeller and 19A duct model, simulations of open water propeller and a ducted propeller with tip clearance d = 1.01mm are carried out. Firstly, open...

... Abstract The parametric resonance, which could induce severe consequence like fatigue, and further lead to oil-spill risk, has been vastly discussed in about the offshore pipelines. In this paper, a top-tensioned riser has been modelled, and the parametric instability of such structure has...

... ABSTRACT To research the phenomenon of heading instability of FPSO, the model test in a scale ratio 1:80 was carried out. It was observed that heading of the model drifted significantly in regular waves. For studying the motion in transitional and stabilized zones, simulation in SESAM...

... breaking induced by dispersive focusing waves and modulational instability. By comparison with some existing experiments, the ability of the present model to predict breaking-onset and breaking energy dissipation are verified. Additionally, the wavelet transform is applied to examine the variations of wave...

... wake transition vortex spatiotemporal symmetry three-dimensional reconstruction equation configuration wake control splitter plate instability cylinder wavelength reynolds number fluid mechanics circular cylinder stability analysis neutral stability curve transition mechanics...

... ABSTRACT Sloshing model tests or wave impact tests in flumes show large variability of local impact pressure measurements. One of the reasons of such variability is the generation of free surface instabilities by the shearing gas flow at the free surface just before the impacts (Kelvin...

... of the pipe cross section. The torque can be generated by, for example route curves, or the weight of inline structures. The rotation phenomenon may be characterised as an instability, as in the case of top-heavy structures which only generate a torque when their centre of gravity becomes laterally displaced...

... equation gravity center limit curve equation instability coefficient amplitude motion happen Research of Porpoising Phenomenon of M-hull Planing Craft Xiaofei Mao1, 2, Zeshuang Yu2, Liang Yan2 1Key Laboratory of High Performance Ship Technology of Ministry of Education 2School of Transportation...

... ABSTRACT Modulation instability describes the exponential amplification of a weak perturbation on top of a plane wave background and it has been extensively studied in the context of weakly nonlinear evolution equations such as the nonlinear Schrödinger equation (NLSE). It has been further...