... Institute of Wuhan Wuhan, Hubei, China ABSTRACT A double-layer orthogonal reinforced plate is a simplified physical model of a centralized vibration isolation system, which is widely used for low-frequency vibration suppression in practical naval architecture. This article presents a local resonance...

... 0.8 between the vibration and radiated noise within 100-2000Hz, indicating a significant relationship between them. Furthermore, it is observed that the coefficient exceeds 0.7 in certain frequency bands. Effective suppression of radiated noise can be achieved by implementing targeted vibration...

... 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...

... We present results from large-scale towing-tank tests conducted to explore the use of jets to suppress the vortex shedding from a circular cylinder immersed in a uniform turbulent stream. The jets were produced by injecting water through a number of discrete holes arranged along the cylinder's...

... at near-shore can suppress the impact of tsunami like waves on the shore. INTRODUCTION A tsunami is a water waveform (or series of waves) that occurs in the ocean (in most cases) that sends a surge of water, sometimes reaching heights of over 30 meters on to land. This kinetic energy within the wave...

... Abstract A wind tunnel experiments on the suppression of vortex-induced vibration for large mass-damping-parameter (m*ζ=1.415) cylinders attached with fairings is investigated. For the bare cylinder, the nondimensional response amplitude is far less than the low massdamping cases...

.... conic cylinder fluid struct variation perforation frequency reynolds number lower reynolds number conic shroud cylinder vortex-induced vibration circular cylinder suppression hydrodynamic parameter conic disturbance upstream oil & gas vortex pattern perforated conic shroud...

... cylinders are discussed in detail. It is found that placing a certain amount of small rods at appropriate locations can achieve good suppression effectiveness, but the effect is different at different diameter ratios or different gaps. Under a specific shear flow, a reasonable parameter combination...

... & Isaacson (1981), Sarpkaya (2004), Williamson & Govardhan (2004; 2008), and Gabbai & Benaroya (2005). Accordingly, many control devices and methods in suppressing VIV have been proposed and applied in recent decades. Most of them were designed based on disturbing the flow past a bluff body, typically...

... swirling strength ( WD 2/ U 2) is almost constant with Reynolds number ( Re = 1.0×104 ~ 4.0×104). For a pipeline close to the bottom, the peak value of WD 2/ U 2 decreases with the decrease of the gap ratio ( e / D ) when e / D < 0.3, owing to the suppression of vortex shedding. For piggyback...

... ABSTRACT: Experimental investigations are conducted to study the influence of attack angle of multiple control rods on the effectiveness of Vortex- Induced Vibration (VIV) suppression for deepwater riser. The riser model is made of UPVC pipe with length to diameter ratio L / D = 1750...

... ABSTRACT: In suppressing vortex-induced vibration (VIV) of flexible risers in deep sea, a new device based on the Bernoulli equation and effects of geometric disturbance on flows around a bluff body is proposed. The mechanism is the disturbance in a radial-spanwise plane on fluid flows around...

... Reynolds number, significant differences in wake vortex patterns were observed for wavy cylinder with small inclined angle while the difference in wake pattern becomes insignificant for large inclined angle. This implies that significant drag reduction and fluctuating lift suppression would be obtained...

... cylinders with different diameters The second test case is flow past two cylinders with different diameters. In 1990, Strykowski and Sreenivasan investigated the suppression of the vortex shedding from a circular cylinder by introducing a small circular cylinder at low Reynolds numbers. Since...

... but highly effective method of seismic survey at sea, the acquired data cannot be stored digitally for subsequent study, including processing, display and interpretation. upstream oil & gas swell effect streamer suppression high-resolution marine seismic data window length reservoir...

... reduction vortex modi visualization study rotation engineering vortex resonance vibration free-vortex line cylinder vibration suppression reduction boundary-layer control suppression Proceedings of the Fifth (1995) International Offshore and Polar Engineering Conference The Hague...

... has been applied to the dynamic analysis of pile-supported offshore platform. Moreover, the solution has been verified by comparing the calculated values of the displacement with the experimental data. Finally, it has been shown that the resonance of platform can be suppressed in the case of irregular...

... operations (Brink and Chung, 1981). A buffer is a large mass at the bottom end of the pipe Vortex shedding introduces control problems as well as restrictions on heading and speed, which can be alleviated by use of vortex-shedding suppression devices (Chung and Whutney, 1980 an. 1981, Whutney and Chung, 1980...