Out-plane even flow-down long and thin stand pipe dynamic response measurement device

Abstract

The invention discloses an out-plane even flow-down long and thin stand pipe dynamic response measurement device. According to the device, a vortex-induced vibration test of a stand pipe under the effect of 90-degree even incoming flow can be achieved; a lifting bottom of an oceanographic engineering deep pool can be fully used for increasing the safety coefficient in the large key installation process; the depth of the oceanographic engineering deep pool can be fully used for simulating actual Reynolds number vortex-induced vibration of the large pipe; the width of the oceanographic engineering deep pool can be fully used so that real-time monitoring equipment can be arranged on the periphery of the large pipe and the shape of a model can be adjusted according to different requirements. Modularized design is adopted, so that the measurement device has the advantages of being convenient to install, upgrade and change and capable of meeting different function requirements.

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 an out-of-plane 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 At this time, the theory of small deformation is no longer applicable, which makes the p...

AI Technical Summary

Problems solved by technology

Analyzing this test technology, it is found that its disadvantages 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 not easy The underwater monitoring equipment around the standpipe is arranged, 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 more complicated. 5. Cannot effectively simulate the movement of ocean platforms

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