A model experimental device for a tension leg platform vortex induced motion pool

Abstract

The invention discloses a model experimental device for a vortex-induced motion pool of a tension leg platform, which can accurately change the angle of the incoming flow of the tension leg platform in the pool. Including horizontal mooring mechanism, horizontal rotation mechanism, horizontal mooring adjustment mechanism and vertical mooring mechanism. The horizontal mooring adjustment mechanism includes a hollow ring and the same number of horizontal mooring adjustment units as the horizontal mooring units. The side of the ring facing the center has an opening that runs through the inner side of the entire ring. On the inner wall of the ring at the opening position There are a plurality of evenly distributed positioning grooves; on the inner wall of the ring opposite to the position of the opening, there is a track along the inner wall of the ring. The horizontal mooring adjustment unit includes a positioning ball and a compression spring. The positioning ball is placed in a positioning slot corresponding to the incoming flow angle to be measured. One end of the compression spring is fixedly connected to the positioning ball, and the other end is slidingly connected to the track. One end of the horizontal mooring cable passes through the opening and is connected with the positioning ball. The device completes the experimental research without dismantling the sensor and acquisition equipment, shortening the experimental cycle.

Description

technical field [0001] The invention relates to the technical field of marine engineering, and more particularly, to a model experiment device of a tension-leg platform vortex-induced motion pool. Background technique [0002] Tension leg platform is one of the important equipments in offshore oil and gas development projects. It is generally composed of the upper part of the platform, the main body of the platform and the tension hamstring system. Under certain incoming flow conditions, periodic alternating vortex shedding occurs at the rear edge of the column of the tension leg platform, which causes the column to be subjected to the lift force perpendicular to the incoming flow direction and the resistance parallel to the incoming flow direction, so that the platform produces vortex-induced motion. Vortex-induced motion will lead to a large reciprocating displacement of the platform, which will significantly increase the load of the platform structure and mooring system. ...

AI Technical Summary

Problems solved by technology

If the angle of the fixed model is changed, the platform model moored in the deep-water experimental pool needs to be hoisted up for disassembly and adjustment, and the pool needs to be drained, and the pre-tension adjustment should be carried out again after the platform model is launched again, which will seriously affect Experiment cycle

At the same time, the installation of sensors and acquisition equipment in this type of experiment is complicated, and frequent disassembly of experimental devices may easily damage and affect the installed platform structure and sensors.

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