Dynamic Response Test Device of Deep Sea Slender Riser Under Vertical Forced Oscillation

Abstract

The invention discloses a dynamic response test device of a deep-sea slender riser under vertical forced oscillation. The invention can realize the vortex-induced vibration test of the standpipe under the action of vertical forced oscillation; it can make full use of the lifting bottom of deep water pools in ocean engineering Increase the safety factor of large-scale key installations; make full use of the depth of deep water tanks in marine engineering to simulate the real Reynolds number vortex-induced vibration of large pipe fittings; make full use of the width of deep water tanks in marine engineering to arrange real-time monitoring equipment around large pipe fittings, according to different needs The shape of the model can be adjusted; the modular design is adopted, which has the advantage of being easy to install, easy to upgrade and change, and to meet 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 At this time, the theory of small deformation is no longer applicable, which makes the problem of vortex-induced vibration of the riser more prominent.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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