A vortex-induced simulation test device for a deep-sea riser array model subjected to pretension under uniform flow

Abstract

A deep-sea riser array model vortex-induced simulation test device under uniform flow under pretension in the field of ocean engineering technology, including: several deep-sea riser modules, a first end support module, a second end support module, a first The fixed column module, the second fixed column module, the afterburner module, two fairing modules, two wave suppressing plate modules and the measurement analysis control module, the present invention utilizes the relative movement of the trailer and the towed pool to simulate the uniform incoming flow of different flow rates, and Pretension can be applied to both ends of the deep-sea riser array model, so as to simulate the vortex-induced vibration of the deep-sea riser array in the laboratory environment. Riser model.

Description

technical field [0001] The invention relates to a device in the technical field of marine engineering, in particular to a vortex-induced simulation test device for a deep-sea riser array model under uniform flow and pretension. Background technique [0002] According to the knowledge of fluid mechanics, when a columnar structure is placed in a certain speed of incoming flow, alternate vortices will occur on both sides of it. Associated with the creation and discharge of vortices, the column is subjected to lateral and flow-wise pulsating pressures. If the column is elastically supported at this point, the pulsating fluid forces will induce vibrations in the column, which in turn will change the structure of its wake. This fluid-structure interaction problem is called vortex-induced vibration. Deep-sea risers often appear in the form of arrays. Since each riser is close to each other, there will be hydrodynamic interference between each other, resulting in more complex vort...

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Problems solved by technology

After analysis, the shortcomings of this testing technology are: 1. Generally, it can only simulate the vortex-induced vibration of small-scale pipe fittings, and the scale effect is difficult to avoid; 2. Due to the speed limit of the ocean engineering pool trailer, it is difficult to effectively carry out the real Reynolds number test. Vortex-induced vibration test; 3. Due to the limitation of the length of the deep water tank of the towed marine engineering, the distance of the test section obtained is small, and the measured test data is less; 4. Only the vortex-induced vibration test of a single riser model can be carried out, which is difficult Conduct vortex-induced vibration tests of two or even multiple riser arrays

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