Netting forced oscillation testing device

Abstract

The invention belongs to the technical field of ocean engineering, and provides a deep ocean netting forced oscillation testing device considering the impact from flow velocity attenuation. The device comprises a fishing net frame module and a forced oscillation module. The fishing net frame module can be slidingly connected to a first vertical sliding module and a second vertical sliding module through a first connection module and a second connection module. The fishing net frame module is perpendicular to the first and second vertical sliding modules, and the first and second vertical sliding modules are respectively connected to the bottom of a trailer. A forced oscillation device is disposed on the trailer, and is connected with the fishing net frame module. The forced oscillation module drives the fishing net frame module to vibrate. The device carries out the sinusoidal oscillation or random oscillation through a forced netting module, so as to simulate the movement of water particles under the conditions of regular waves and irregular waves. The device employing the fishing ground netting module under the uniform flowing condition forces the front and rear nets to carry out oscillation at the same time, so as to simulate the flowing speed attenuation condition under the condition of a big KC number of waves.

Description

Technical field [0001] The invention belongs to the technical field of ocean engineering, and specifically relates to a deep-sea netting forced oscillation test device considering the influence of flow velocity attenuation. Background technique [0002] In fluid mechanics, the Keulegan-Carpenter number (KC number) is a dimensionless number used to describe the relationship between the resistance of an object in an oscillating flow field and the inertial force. It can also be used for an object Oscillation in a static fluid. A small KC number means that the influence of inertial force is greater than the resistance, and a large KC number means that the (turbulent flow) resistance has a greater influence. [0003] In the force study of deep-sea net cages, due to the limitation of wave-making capabilities of wave makers, the experimental research of fishing nets is still limited to low KC conditions. For net cage nets, such slender and flexible structures, This does not reflect the ...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a deep-sea net clothing forced oscillation test device considering the influence of flow velocity attenuation, aiming to solve the problem that the existing test device is limited to the overall model, the scale effect is large, and the simulation is relatively difficult. In low KC number sea conditions, there is no boundary treatment for the fishing net frame, and it is limited to the simulation of downstream single-degree-of-freedom vibration, which cannot simulate the actual sea conditions more realistically

Images