Results 31 to 40 of about 16,108 (315)
Dynamic Interaction of a Heavy Crane and a Ship in Wave Motion [PDF]
Modeling, Identification and Control, 2018 Previous work on the dynamics of vehicle-manipulator systems is extended to offshore ships with heavy cranes. The proposed method is based on a Newton-Euler formulation where the forces of constraint are eliminated using projection matrices based on the ...
Geir Ole Tysse, Olav Egeland
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Model Analysis and Modified Control Method of Ship-Mounted Stewart Platforms for Wave Compensation
IEEE Access, 2021 Offshore installations e.g. marine transportation, oil platforms, etc. are strongly depended on sea conditions. To increase workable time of carrying out these operations, a Stewart platform is installed on a ship to serve as a motion compensation base ...
Yunfei Cai +4 more
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A numerical investigation on the nominal wake of KVLCC2 model ship in regular head waves
International Journal of Naval Architecture and Ocean Engineering, 2020 Analysis: of the propulsion performance considering ship motion in waves is an important factor for the efficient operation of a ship. The interaction between the propeller and the free surface due to the ship motion in waves has a significant influence ...
Hyun-Woo Shin +4 more
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Resistance to motion of ships [PDF]
Journal of the Franklin Institute, 1870 n ...
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Intelligent control algorithm for ship dynamic positioning
Archives of Control Sciences, 2014 Ship motion in the sea is a complex nonlinear kinematics. The hydrodynamic coefficients of ship model are very difficult to accurately determine. Establishing accurate mathematical model of ship motion is difficult because of changing random factors in ...
Meng Wang +3 more
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Searching for Critical Conditions During Lifeboat Launching – Simulations
Polish Maritime Research, 2017 The article describes numerical simulations of the process of lifeboat launching at the ship’s side. The research aimed at finding the values of ship motion parameters which appear to be most dangerous for people in the lowered lifeboat due to the ...
Dymarski Czesław +2 more
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Polish Maritime Research, 2014 The article presents a numerical model of object motion in six degrees of freedom (DoF) which is intended to be used to simulate 3D motion of a lifesaving module during its launching from a ship using a stern ramp in rough sea.
Dymarski Paweł, Dymarski Czesław
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Numerical and Experimental Studies on Ship Motions Induced by Passing Ship [PDF]
Volume 7A: Ocean Engineering, 2018 To investigate the ability of numerical models to simulate the behavior of moored ships subjected by ship-wake waves, use is made of scale model tests where a ship model sails with constant speed along a straight path at a constant distance from an otherwise motionless ship.
Pedro, Francisco G. +4 more
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Influence of initial heeling angle on ship roll motion response
Zhongguo Jianchuan Yanjiu, 2022 Objectives In this work, the influence of the initial heeling angle on the roll motion response of a ship in random beam wave is studied. MethodsSpecifically, the path integration method is applied to solve the Fokker-Planck equation, which governs the ...
Zewen ZHANG +4 more
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A Two‐Stage Questionnaire and Actigraphy Screening for iRBD in a Multicenter Retrospective Cohort
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Isolated rapid‐eye‐movement sleep behavior disorder is a prodromal marker of synucleinopathies. However, most cases remain undiagnosed due to the insufficient predictive value of questionnaires and limited access to confirmatory video‐polysomnography. We assessed a two‐stage screening strategy combining a brief questionnaire on rapid‐
Caleb A. Massimi +17 more
wiley +1 more source