scholarly journals Sea wave impact on a ship moored at the berth with a stilling pool

2015 ◽  
Vol 55 (03) ◽  
pp. 57-66 ◽  
Author(s):  
K. K. Semenov ◽  
V. A. Leontiev ◽  
I. S. Nudner
Keyword(s):  
Wave Impact ◽  
Sea Wave

The motion of a rigid body impelled by sea-wave impact

1999 ◽  
Vol 21 (3) ◽  
pp. 113-125 ◽  
Author(s):  
S.J. Cox ◽  
M.J. Cooker
Keyword(s):  
Rigid Body ◽  
Wave Impact ◽  
Sea Wave

scholarly journals Numerical Modeling of Wave Disturbances in the Process of Ship Movement Control

Algorithms ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 130 ◽  
Author(s):  
Piotr Borkowski
Keyword(s):  
Stochastic Process ◽  
Numerical Modeling ◽  
Numerical Model ◽  
Wave Spectrum ◽  
Movement Control ◽  
Angular Speed ◽  
Stabilization System ◽  
Wave Impact ◽  
Wave Disturbances ◽  
Sea Wave

The article presents a numerical model of sea wave generation as an implementation of the stochastic process with a spectrum of wave angular velocity. Based on the wave spectrum, a forming filter is determined, and its input is fed with white noise. The resulting signal added to the angular speed of a ship represents disturbances acting on the ship’s hull as a result of wave impact. The model was used for simulation tests of the influence of disturbances on the course stabilization system of the ship.

Improvement of Hydrofoil Performance by Partial Ventilated Cavitation in Steady Flow and Periodic Gusts

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Jim Kopriva ◽  
Roger E. A. Arndt ◽  
Eduard L. Amromin
Keyword(s):  
Cavity Length ◽  
Excitation Frequency ◽  
Nonlinear Effects ◽  
Cavitation Number ◽  
Wave Impact ◽  
Linear Perturbations ◽  
Lift And Drag ◽  
Cavitating Hydrofoil ◽  
Sea Wave

This paper describes a study of the response of a recently developed low-drag partially cavitating hydrofoil (denoted as OK-2003) to periodical perturbations of incoming flow. A two-flap assembly specially designed to simulate sea wave impact on the cavitating hydrofoil generates the perturbations. The design range of cavitation number was maintained by ventilation. Unsteady flow can be simulated over a range of ratios of gust flow wavelength to cavity length. The measurement of time-average lift and drag coefficients and their fluctuating values over a range of inflow characteristics allows a determination of hydrofoil performance over a range of conditions that could be expected for a prototype hydrofoil. Both regular interaction with practically linear perturbations and resonancelike singular interaction with substantial nonlinear effects were noted. The observations are accompanied by a numerical analysis that identifies resonance phenomena as a function of excitation frequency.

Applicability of Smoothed Particle Hydrodynamics for estimation of sea wave impact on coastal structures

2015 ◽  
Vol 96 ◽  
pp. 1-12 ◽  
Author(s):  
Corrado Altomare ◽  
Alejandro J.C. Crespo ◽  
Jose M. Domínguez ◽  
Moncho Gómez-Gesteira ◽  
Tomohiro Suzuki ◽  
...  
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Coastal Structures ◽  
Wave Impact ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Sea Wave

RADAR CONTRAST OF WIND RIPPLES ON THE SEA WAVE OF SEISMIC ORIGIN

2011 ◽  
Vol 2 (2) ◽  
pp. 181-188 ◽  
Author(s):  
A. A. Boeva ◽  
A. G. Boev ◽  
O. Y. Matveyev
Keyword(s):  
Seismic Origin ◽  
Sea Wave

The use of the spatial characteristics technique with the view of estimating the explosion wave impact on the stuck drilling string zone / Wykorzystanie techniki charakterystyk przestrzennych do określania wpływu fali uderzeniowej na przychwyconą kolumnę przewodów wiertniczych

2012 ◽  
Vol 57 (3) ◽  
pp. 601-618 ◽  
Author(s):  
Vasyl Moisyshyn ◽  
Vasyl Yacyshyn ◽  
Oleg Vytyaz
Keyword(s):  
Drill Pipe ◽  
Charge Weight ◽  
Practical Implementation ◽  
Problem Solution ◽  
Wave Impact ◽  
Spatial Characteristics ◽  
Explosion Wave ◽  
Deformation State ◽  
Drilling String ◽  
Threaded Joints

Abstract Studied here are the results of the asymmetric problem solution of the thick walled circular cylinder elasticity using the spatial characteristics technique. The practical implementation of the solution of the problem is based on the calculation of the stress-caused deformation state of the stuck drilling string zone affected by the explosion wave action upon the inner wall of the pipe. Suggested here is the technique for determining axual σz and circular σθ stress on the drill pipe wall as well as the radial displacements ur of the stuck drill pipe outer surface under the action of the explosion shock wave. The above technique enables to make a sound selection of the cylindrical explosive charge weight in order to avoid the residual strain during the drilling string shaping off and uncoupling the threaded joints or to prevent them from exceeding the admissible level.

Hydroelastic effects in structural response under wave impact

2017 ◽  
Author(s):  
Liang-Yee Cheng ◽  
Rubens Augusto Amaro Junior
Keyword(s):  
Structural Response ◽  
Wave Impact
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