A test device for measuring the dynamic response of slender risers under uniform flow

Abstract

The invention discloses a test device for measuring the dynamic response of a slender standpipe under uniform flow. The invention can realize the vortex-induced vibration test of the standpipe under the action of uniform incoming flow; The safety factor of the key installation; the present invention can make full use of the depth of the deep pool of marine engineering to simulate the real Reynolds number vortex induced vibration of large pipes; the present invention can make full use of the width of the deep pool of marine engineering to arrange real-time monitoring equipment around large pipes, according to different The shape of the model needs to be adjusted; the invention adopts a modular design, which has the advantages of being easy to install, easy to upgrade and change, and to meet different functional requirements; vortex induced vibration test.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to an experimental device for measuring the dynamic response of a slender standpipe under uniform flow and simultaneously monitoring vortex-induced vibration (VIV). Background technique [0002] Under the action of wind, wave and current, the marine floating structure will drive the catenary riser to make periodic reciprocating motions in the water, thereby generating a relative oscillating flow in the direction of riser movement, and this oscillating flow will encourage the standpipe to hang "Intermittent" vortex-induced vibration occurs in the section. In recent years, with the development of deep-sea petroleum systems, catenary risers have been widely used in engineering. The riser in the deep water environment can be regarded as a slender and flexible structure. At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex...

AI Technical Summary

Problems solved by technology

Analyzing this test technology, it is found that its shortcomings are: 1. Considering the depth of the towing pool, it is generally only possible to simulate the vortex-induced vibration of small-scale pipe fittings, and it is difficult to effectively test the vortex-induced vibration at the real Reynolds number; 2. It is easy to arrange the underwater monitoring equipment around the standpipe, and the shape of the standpipe cannot be adjusted during the slow wave riser model test; 3. The forced oscillation experiment at a certain flow rate cannot be carried out; 4. The process of installing the standpipe in the experiment is difficult Complex; 5. Cannot effectively simulate the movement of ocean platforms

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