Dynamic response testing device for deep-sea elongated vertical pipe under vertical forced oscillation

Abstract

The invention discloses a dynamic response testing device for a deep-sea elongated vertical pipe under vertical forced oscillation. By the dynamic response testing device, vortex-induced vibration testing of the vertical pipe under vertical forced oscillation action can be realized, safety coefficient in large pipe mounting can be increased by fully utilizing a lifting pedestal of an oceaneering deepwater pool, real Reynolds number vortex-induced vibration of the large pipe can be simulated by fully utilizing depth of the oceaneering deepwater pool, realtime monitoring equipment can be arranged around the large pipe by fully utilizing width of the oceaneering deepwater pool, and shape of a model can be adjusted according to different needs. Due to adoption of modularized design, the dynamic response testing device has the advantages that the dynamic response testing device is convenient to mount, upgrade and modify and meets different functional requirements.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to a dynamic response testing device for a deep-sea slender riser under vertical forced oscillation. 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 At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex-induced vibration of the riser more prominent. The analysis of...

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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