... propeller ship amplitude sustainable development resistance efficiency characteristic simulation coefficient calculation spectrum oscillation equation frequency application politis optimization prediction conjunction subplot bc hull Proceedings of the Thirty-fourth (2024...

... ABSTRACT This study presents a proof of concept for new auxiliary propulsion. The proposed design includes open to the sea ship compartments. Seawater oscillates inside the specially shaped compartments due to the relative ship motions in waves. The curved profile of these compartments...

... of the hydrodynamic performance of the offshore oscillating water column device with varying tilt angle Limin Song1,Qiaorui Wu1* ,Yonghe Xie1* 1School of Zhejiang Ocean University, Zhoushan, Zhejiang Province, China ABSTRACT Among wave energy conversion devices, the oscillating water column device (OWC) is one...

... ABSTRACT This research delves into the attributes of wave pressure on a breakwater-integrated Oscillating Water Column (OWC) wave energy converter. The inquiry entails experimental assessments with one caisson breakwater and two variants of the OWC device: modified OWC (M-OWC) and conventional...

... ABSTRACT In this publication, a novel mechanical test rig is described, which is built to determine the structural and material damping in axially tensioned subsea power cables and umbilicals, during both high frequency oscillations and low frequency wave frequencies. The test set-up includes...

... is theoretically explored based on variable tension control strategy for arresting cable. The simulation results illustrate that the present strategy ensure that the UUV returns to the docking point without oscillation and the entire recovery time was limited within 150s. It provides technical guarantee...

... sharpness, and numerically simulates the hydrodynamic characteristics of forced sinusoidal oscillation of heave plates. The force history curves and hydrodynamic coefficients of forced sinusoidal oscillation of heave plates with different wing edge sharpness at different KC numbers and frequencies...

... as theoretical approach as much as possible. The components with a large contribution to the wave pressure are identified, and then the incident wave pressure is formulated as well as the heave and pitch oscillation restoring force pressure. Although there were some elements that were difficult to express...

.... Focusing on roll damping estimation by means of Computational Fluid Dynamics (CFD) with forced oscillations or free-decay testing, Gu et al. (2019) examined the influence of several numerical parameters, e.g., boundary condition, wall function etc. Koop et al (2019), examined via 2D hull sections...

..., large rotational roll motions are believed to be the most important in this context. If the ventilation opening at a given time is located below the tank free surface during vessel oscillations, the water can pour out of the vent due to hydrostatic pressure. In addition, local dynamic effects could...

... splashing which is commonly observed in liquid sloshing. In this paper, the in-house MPS solver MLPartile-SJTU is used to simulate the liquid sloshing within a three-dimensional spherical tank. The sphere is prescribed to an oscillating motion with different motion amplitudes, frequencies and liquid filling...

... particle distance between the particle i and j and ECS is the term to stabilize numerical oscillation based on the ECS method. i,CCFL ,r i j and ECS are de ned as follows: i = 1 n0 ji + 1 r i j wi j r i j 2 xi jy i j ri j3 2r rw1i i j2ji j xrrxi i i i jjj3j2ui ju+i j2 u i jvi j + xi j ri j a x,i j...

... with the inflow angle, identifying a critical angle α c between 30° and 45°. Below α c , severe galloping oscillation can be observed at lower angles, while above α c , the maximum amplitude increases with the inflow angle, and no prominent galloping phenomenon is observed. Additionally, the frequency...

... and in the full-scale NOEL facility in Reggio Calabria, it is likely that details will be shortly published. For floating structures composed of two rigidly connected identical cylinders, the commonly studied shape is the horizontal alignment, as explored in Wang and Wahab (1971). oscillation pipe...

... Oscillation, NAO: North Atlantic Oscillation, NPO: North Pacific Oscillation, and SAM: Southern Annular mode) are considered to identify the regions with significant impacts in H max . stefanako ocean inter-annual variability pacific ocean wavery dataset reanalyse database sea variability...

... united states government stiffness horizontal coordinate non-linear kpa oscillation 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...

..., this paper proposes a Piecewise fuzzy adaptive PID control method. This control method can control the underwater vehicle to reach the target speed smoothly and quickly, and the oscillation amplitude of the traction force is small during the traction process. INTRODUCTION Common linear drive methods...

... response and the flow field in the wake of the structure. Our results show that attaching a splitter plate with a width equal to the cylinder's diameter can significantly reduce oscillations across a wide range of flow velocities. This study provides insights into passive FIV suppression techniques...

... in the referred model tests, which are reproduced by the present second-order time-domain model with reasonably good accuracy. The linear model is shown to significantly underestimate the motion responses close to the wave-focusing time and the large-amplitude transient LF oscillations when the focused waves have...

... ABSTRACT The article provides information on various types of oscillations that arise during iceberg towing; both long-period and short-period oscillatory processes are considered; simple formulas for calculating the periods of oscillations are given. The results presented in the article...