A deep sea slender riser dynamic response test device for simulating submarine pipe soil and shear flow

Abstract

The invention discloses a deep-sea slender riser dynamic response test device for simulating seabed pipe soil and shear flow. The invention can realize the vortex-induced vibration test of the riser under the action of shear flow; The movement of the top platform after being affected; the depth of the deep water pool in ocean engineering can be fully used to simulate the real Reynolds number vortex induced vibration of large pipe fittings; the width of the deep water pool in ocean engineering can be fully used to arrange real-time monitoring equipment around large pipe fittings, and 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; it can simulate the movement of the riser under the action of the variable bottom shear flow, and carry out a more realistic vortex Vibration test.

Description

technical field [0001] The invention belongs to the field of ocean engineering, and in particular relates to an experimental device for measuring the dynamic response of a slender riser and monitoring the vortex-induced vibration (VIV) simultaneously, which can simulate the joint influence of the seabed pipe-soil action and shear flow. 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. Under the action of floating body motion and environmental load, the interaction between the riser and the seabed will cause very large bending stress on the riser, which is prone to fatigue damage. In recent years, with the development of deep-sea petro...

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 conduct the vortex-induced vibration test at the real Reynolds number. 2. It cannot pass Experimental simulation of the interaction between the riser and the seabed 3. It is not easy to arrange underwater monitoring equipment around the riser, and the shape of the riser cannot be adjusted during the slow wave riser model test 4. It is impossible to perform forced oscillation at a certain flow rate Experiment 5. The process of installing the riser in the experiment is more complicated. 6. The movement of the offshore platform cannot be effectively simulated

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