| The problem of cylinder vortex-induced vibration has been arousing major concern, and the separating plate has been extensively studied as an apparatus to restrain vortex-induced vibration. The ratio of the length of separating plate L to the diameter of the cylinder D, L/D, is the main factor to influence the effect of restriction. This paper applies the finite volume method, combined with the RANS equation and a certain turbulence mode, to disperse and solve the flow field. Through compiling the user-defined program and using dynamic mesh, it is feasible to simulate the change of basin boundary brought about by the motion of structures. Aimed at the flexibly supported cylinder and the separating plate model with an additional length of 0.5 D, vortex-induced vibration and its restriction are studied under the reduced velocity Ur of 2.5 to 13. The results show that the separating plate can restrain, even eliminate cylinder vortex-induced vibration, with over 99% of amplitude of vibration restricted. After the initial point has been pushed back, the lock room narrows down. Besides, the cylinder resistance and elevating force of the auxiliary separating plate are curbed, with its St slightly higher than that of a single cylinder, but without large difference. |
