Elongated stand pipe power response measurement device under shearing flow

Abstract

The invention discloses an elongated stand pipe power response measurement device under shearing flow. The device comprises a deep sea stand pipe module, a top part boundary module, a bottom part boundary module, a fixing module, a top part slide module, a bottom part fixing module and a measurement, analysis and control module. The two ends of the deep sea stand pipe module are respectively connected with the top part boundary module and the bottom part boundary module. The fixing module is connected with the top part boundary module and the top part slide module. The top part slide module is connected with the fixed end of the bottom part of a trailer. The bottom part fixing module is connected with the bottom part boundary module and a pool small false bottom. The deep sea stand pipe module and the fixing module, the top part slide module and the bottom part fixing module are respectively arranged in the same plane. The measurement, analysis and control module is respectively connected with the deep sea stand pipe module, the top part boundary module, the bottom part boundary module, the fixing module, the top part slide module and the bottom part fixing module. The device aims at analyzing the overall vortex-induced vibration response characteristic of the elongated flexible stand pipe under the effect of shearing flow.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to an experimental device for measuring the dynamic response of a slender riser under shear flow and 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 At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex-induced vibration of the riser m...

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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