heave motion
Wave loadings on a vertical cylinder due to heave motion
... In this paper we hve presented the analyticM solution for the boundary value problem to evaluate the forces and the moments for a vertical circular cylinder heaving in water of finite de[r] ...
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Optimal control of the heave motion of marine cable subsea-unit systems
... VOLUME I VOLUME III Offshore Mechanics and Technology TLP and Ringing Floating Structures and Production Offshore Systems and Structures Offshore Resources Gas Hydrates Deep-Ocean Mining[r] ...
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Modelling and simulation of traditional hydraulic heave compensation systems
... Translational systems show overall better performance. They tend to achieve a higher accuracy, because they only have to compensate for the mass of the load and cable, whereas the rotational systems also have to rotate ...
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Investigation on parametrically excited motions of point absorbers in regular waves
... relative heave degree of ...relative heave motion is decreased, the net rate of energy dissipation from the entire system may be ...to heave excitation from the incident wave. The heave ...
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Hardware-in-the-loop implementation for an active heave compensated drawworks
... Now that the optimal parameters have been found for the outer P-controller and inner PI-controller for load case 1 and 2, the system needs a final verification for its range of operation. This range is the lowering from ...
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Undulatory locomotion of flexible foils as biomimetic models for understanding fish propulsion
... a heave motion at their leading edge, and compare this motion with body bending patterns of bluegill sunfish (Lepomis macrochirus) and clown knifefish (Notopterus ...and heave frequencies ...
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Determination of the Response Amplitude Operator(s) of an FPSO
... whose motion analysis is considered in this ...amplitude motion of the FPSO before any offshore ...for Heave motion a tendency for the heave peak value to move slightly higher ...
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Investigation of focused wave impact on floating platform for offshore floating wind turbine : a CFD study
... surge motion responses are close to those achieved with the second order potential theory while differ from the results obtained using linear potential ...pitch motion, differences are observed between two ...
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Numerical Simulation of Water Impact on a Wave Energy Converter in Free Fall Motion
... A popular class of wave energy converter (WEC) con- sists of floating bodies which oscillate with one or more degrees of freedom and whose horizontal dimensions are small in comparison to the wave length. Such bodies are ...
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Assessment of boundary-element method for modelling a free-floating sloped wave energy device. Part 2 : experimental validation
... the heave response will follow the motion of the free surface, so when the model is subjected to a regular incident wave and no reflected wave, its normalised heave response will be ...horizontal ...
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Dynamic Response of Coupled Mooring Lines and Floating Wave Energy Devices in Waves / Currents
... sway motion at all. The sway and heave motion is higher when it goes to deep ...the heave and surge motion is higher than two ...in heave motion as in two ...the ...
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A Novel Three Degree of Freedom Stewart-like Platform for Testing Humanoid Postural Capabilities
... A novel design of Stewart platform of particular motions of surge, heave, and pitch was proposed in this paper. Several key elements were demonstrated including overall design, structural analysis, kinematics, ...
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Control of Wave Energy Converters for Maximum Power Absorption with Time Domain Analysis
... Power from ocean waves can be converted useful energy (e.g. electrical energy) by the use of Oscillating Water Columns (OWC) or OverTopping Devices (OTD) exploiting power of the seawater or oscillating devices (e.g. ...
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Frost susceptibility of recycled aggregate
... frost heave of crushed concrete appeared to be directly influenced by the initial moisture content of the specimens, the increase in volume of the material due to the expansion of this water on freezing was ...
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Mass and energy of the body in motion msr (motion shapes reality)
... (5.2) Figure 2 represents the dependence of the momentum on the velocity according to STR (Special Theory of Relativity) and according to MSR (Motion Shapes Reality). Force is defined as the measure of the mutual ...
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Permanent deformation of concrete block pavements under highway accelerated loading
... the heave generated along each side of the wheelpath and the length of test section where the load was constant and not affected by the acceleration and deceleration of the load at the start and end of the 4 metre ...
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Longitudinal static stability requirements for wing in ground effect vehicle
... ABSTRACT: The issue of the longitudinal stability of a WIG vehicle has been a very critical design factor since the first experimental WIG vehicle has been built. A series of studies had been performed and focused on the ...
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Parameters Analysis of the Covering Soil of Tunnels Constructed In Liquefiable Soils
... free-field motion which would exist in the absence of the ...free-field motion in such a way that boundaries retain their non-reflecting properties- ...
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Study on Preliminary Design of the Transmission Towers’ Foundation in Arctic Permafrost Region
... frost heave force on the foundation base appears greater on both sides and smaller in the ...frost heave force ...frost heave force must be ...
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The Effectiveness of Pole Placement Method in Control System Design for an Autonomous Helicopter Model in Hovering Flight
... velocity, heave and yaw controller for the autonomous helicopter ...and heave controller design could not be implemented in the tests due to limitation of resources in this ...
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