Uniform flow vortex-induced vibration simulation tester for seabed pipeline

Abstract

The invention relates to a uniform flow vortex-induced vibration simulation tester for a seabed pipeline. The invention is characterized in that the tester comprises a simulating false bottom which is arranged in a towing tank; both ends of the simulating false bottom are respectively and slidingly arranged in upright columns in a penetrating way; the top ends of the two upright columns are jointly connected and arranged on a towing truck above the towing tank; the middle-lower parts of the two upright columns are respectively provided with an end part supporting structure; the two end part supporting structures are respectively connected with corresponding shaft ends of a seabed pipeline model; and the towing tank is internally provided with a measuring and analyzing system. As the tester has ingenious structure, can place the seabed pipeline model in the towing tank, simulates vortex-induced vibration under uniform flow, can simulate real seabed conditions and the seabed pipeline with the actual size, the test time is longer, the tester can be widely applied to the vortex-induced vibration test process of the seabed pipeline.

Description

technical field [0001] The invention relates to a device in the technical field of marine engineering, in particular to a vortex-induced vibration simulation test device for a submarine pipeline model placed horizontally in a towing pool under uniform flow. Background technique [0002] If a columnar structure is placed in an incoming flow at a certain speed, alternate vortices will occur on both sides. Associated with the creation and discharge of vortices, the column is subjected to lateral and flow-wise pulsating pressures. If the column is elastically supported at this point, the pulsating fluid forces will induce vibrations in the column, which in turn will change the structure of its wake. This fluid-structure interaction problem is called vortex-induced vibration. For example, under the action of ocean currents, vortex-induced vibrations will appear on flexible pipes such as offshore platform risers, tow cables, submarine pipelines, spar platform buoys, mooring cabl...

AI Technical Summary

Problems solved by technology

After analysis, the shortcomings of this test technology are: 1. Generally, it can only simulate the vortex-induced vibration of small-scale pipe fittings, and it is difficult to effectively carry out the vortex-induced vibration test under the actual Reynolds number.

2. Due to the limitation of the length of the deep water tank of the towed marine engineering, the distance of the test section obtained is relatively small, and the measured test data is less; 3. The uneven terrain environment where the submarine pipeline is located cannot be truly simulated.

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