... industry and the continuous increase of the tonnage of ships, some ship maneuvering problems, such as ship encounters, underway replenishment work, and multi-ship obstacle avoidance strategies, have attracted great attention of researchers. If two ships are close to each other, the transverse force and yaw...

... profile rudder deflection maneuverability rudder submarine model suboff model drift angle pressure field simulation hull deflection coordinate system velocity field diameter grid transverse force propeller Impacts of Rudder Profiles on UV Maneuverability Based on Numerical Simulation...

... ABSTRACT Market demands for Surface Piercing Propellers (SPPs) are high in both commercial and naval branches. It is the main propulsion system in high-speed marine vehicles (HSMVs).Unlike water-jet pump, behavior of the HSMVs is susceptible to the large transverse force and torque of SPP...

... installation and operations equation experiment sst turbulence model leg motion transverse force dn direction cfd simulation Study of Drag Force Acting on Various Types of DP Jack-up Vessel Legs Nitin D Thulkar Graduate School of Engineering, Kyushu University, Fukuoka, Japan Satoru Yamaguchi...

... structure is complex. side-by-side arrangement engineering wave force transverse force irregular wave pile group coefficient arrangement spectrum coefficient pile group structure frequency inline force pile group effect peak frequency experiment bonakdar Experimental Study...

... oil & gas force coefficient transverse force experimental data k-lattice leg reynolds number low kc number circular cylinder jack-up leg total force Assessment of the Hydrodynamic Forces for Equivalent Modelling of Jack-Up Legs Arman Ghezelbashan, Cedric D Mello Department of Civil...

... be assessed, but also valuable insight can be obtained into the flow behavior through visualization of the flow field. single track force coefficient fluid dynamics drag coefficient smooth circular cylinder flow angle circular cylinder kc number chord experimental data transverse force...

... on the transverse force. The biggest transverse force is found to occur on the rear cylinder rather than the front one. This is quite different from the results in unidirectional waves and should be paid much more attention in the design of offshore structures. INTRODUCTION Circular cylinder are frequently used...

... on the third and final day of drilling, when the vibrations caused fatigue failure of the riser at the buoy. l. orbit riser section vibration drilling-induced vibration pipe riser drill pipe drill pipe rotation torque rpm transverse force upstream oil & gas radial force fluid force...

... necessary for the development of modern underwater vehicles. suboff flow field coupling drift angle space motion equation separation underwater vehicle pressure cloud picture turbulence model oblique motion rng model maneuverability vertical plane transverse force horizontal plane...

... wave. The effect of wave directionality on the transverse force is more obvious than on the normal force. The transverse force on the front cylinder is not always larger than that on the back cylinder, especially, for smaller s. As a consequence of the results, the engineering project design based...

... of vehicles, cranes, impact forces due to ship berthing, bollard pulling force, brake force, wind force, earthquake force and the forces by the waves. The wave forces on the pile are drag forces, inertia force and transverse force due to eddy shedding. The forces on the platform are slamming force and uplift...

... ABSTRACT: The quasi-steady hypothesis is widely used to describe the vortexinduced transverse force on a structural member in a time varying flow. The quasi-steady hypothesis depends upon the use of an instantaneous frequency. This paper discusses the concept of the instantaneous frequency...

..., and the agreement appears to be quite good. 1. INTRODUCTION Extensive experimental studies have been performed on spring supported cylinders in steady, uniform flow, and it has been found that the drag force is quite regular, while the transverse force exhibits a large degree of variability. However...

... on the sectional part of the rigid cylinder for both cases vibrating in transverse direction and mounted stationary were made. The amplifications of the in-line force and transverse force acting on a vortex-excited vibrating cylinder are recognized in the range of KC number about 5 to 8. The increase...

... total in-line force coefficient CF and transverse force (lift) coefficient CL have been analysed in terms of their maximum and root mean square values. All the in-line and lift force coefficients were given as a function of Re and Kc number, and also tJleir deviations with the avcrage value have been...

... irani national research council ottawa upstream oil & gas reynolds number lift coefficient vertical cylinder transverse force keulegan carpenter number loading Proceedings of the Second (1992) International Offshore and Polar Engineering Conference San Francisco, USA, 14-19 June 1992...

... different expressions for the transverse force. The equations of motion for these models are uncoupled. In contrast, the third model considers the drag and lift force components in directions parallel and perpendicular to the direction of instantaneous relative velocity between the cylinder and the flow...

... that when there is a current, lower values of CD tend to occur particularly when KC is in the range from about 8 to 22. In the range 5 ≤ U/ND ≤ 7.5, the maximum magnitude of the transverse force can be larger than that of the in-line force but the fundamental frequency of the second can be larger than...

.... A maximum in the transverse vibration occurs at reduced velocities in the region of 5 for circular cylinders in subcritical flow, when the vortex shedding locks on to the cylinder motion and the frequency of the transverse force induced by the shedding is close to the natural frequency of the cylinder...