Damping plate structure to reduce fluid turbulence in moon pool cavity

Abstract

The invention belongs to the technical field of ship moon pools, and relates to a ship moon pool structure, in particular to a damping plate structure reducing the surging of fluid in a cavity of a moon pool. The damping plate structure is characterized by comprising a horizontal damping plate and a vertical damping plate; the vertical damping plate and the horizontal damping plate are provided with holes respectively, water flow enters the area between the vertical damping plate and the horizontal damping plate, and then the surging of the water flow is reduced; ventilation pipelines communicated with the outside atmosphere are arranged on the side face of an air cushion area between a moon pool top cover and a free surface in the moon pool. Because the ventilation pipelines communicated with the outside atmosphere are arranged on the side wall of the air cushion area, the pressure of the air cushion area is the same as outside pressure, the waving of water inside the moon pool is synchronized with the waving of water outside a ship as far as possible, and the surging of the water flow is reduced. In this way, the sailing resistance is reduced, and the power consumption of a motor is lowered.

Description

technical field [0001] The invention relates to a ship moon pool structure, in particular to a damping plate structure for reducing fluid turbulence in a moon pool cavity, and belongs to the technical field of ship moon pools. Background technique [0002] On offshore engineering operation ships such as drilling ships, cable laying ships, and survey ships, it is necessary to set up a moon pool that runs through the hull to facilitate the development of related engineering operations. Most of the operation moon pools are square. The inner cavity of the moon pool is connected to the sea water, which will cause turbulence due to the navigation of the ship and the wave motion of the sea water. The inner wall of the moon pool has different effects on the fluid excitation under different structural forms, and the difference is very large. When the fluid in the moon pool is violently turbulent, it will cause serious damage to the operating facilities or operating activities in the...

AI Technical Summary

Problems solved by technology

The form of setting the inner wall without openings will intensify the fluid oscillation in the moonpool cavity under certain conditions; although the method of setting damping plates with openings is widely used, the structural form and damping effect of the damping plate are not corresponding in the current specifications. There is no definite structural form and opening arrangement, and the damping effect obtained by various design structures is uncertain.

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