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Vortex vibration testing device for flexible pipe mould vertical in towing pool

A towing pool and vortex-induced vibration technology, applied in the field of marine engineering, can solve the problems of low maximum Reynolds number, small test section distance, unevenness, etc., and achieve the effect of good flow field uniformity and high Reynolds number.

Active Publication Date: 2007-12-19
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

After analysis, the shortcomings of this technology are: first, it can only create a uniform flow field along the axial direction of the riser, but the flow field where the actual flexible riser is located is mostly non-uniform; second, the maximum that can be achieved The Reynolds number is low, which is an order of magnitude different from the maximum Reynolds number suffered by the actual flexible riser. Third, the length of the pool is limited. When the vehicle speed is high, the distance of the test section that can be obtained becomes very small, and the data that can be collected Correspondingly become less

Method used

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  • Vortex vibration testing device for flexible pipe mould vertical in towing pool
  • Vortex vibration testing device for flexible pipe mould vertical in towing pool
  • Vortex vibration testing device for flexible pipe mould vertical in towing pool

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Embodiment Construction

[0029] The present invention will be described in detail below by means of the examples in conjunction with the accompanying drawings: the following examples are implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following the embodiment.

[0030] As shown in FIG. 1 , this embodiment consists of a pipe fitting model 1 , an end support mechanism 2 , a flow rate increasing device 3 , a vertical test support frame 4 , a trailer 5 and a measurement and analysis system 6 . The pipe fitting model 1 is vertically placed in the towing pool for the vortex induced vibration test. The pipe fitting model 1 passes through the flow velocity increasing device 3. There is only one flow velocity increasing device 3 and it is placed in the middle 1 / 3 of the length of the pipe fitting model 1. The pipe fitting model The two ends of...

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Abstract

A vortex-exciting vibration test device of flexible pipe fittings model set vertically in pull water pool is prepared as passing pipe fittings model through flow-speed increasing unit; setting said model and said unit vertically in pull water pool; supporting two ends of said model by support mechanism; using vertical test support to connect said unit and support mechanism with trailer and distributing various instruments of measurement-analysis system in said model, said units, said mechanism, said support and said trailer.

Description

technical field [0001] The invention relates to a test device in the technical field of marine engineering, in particular to a vortex-induced vibration test device vertical to a flexible pipe model in a towing pool. Background technique [0002] Under the action of ocean currents, vortex shedding will periodically occur on flexible pipes such as suspended submarine pipelines, offshore platform risers and tow cables. These flexible pipes are therefore subjected to periodic exciting forces, resulting in vortex-induced vibrations. Vortex-induced vibration will lead to the increase of drag coefficient and structural fatigue damage of flexible pipe fittings. When designing marine flexible pipes, the fatigue damage of pipes due to vortex-induced vibration will be an important factor that must be considered. [0003] At present, model test is one of the most reliable and main research methods to study the phenomenon of vortex induced vibration of flexible pipe fittings. Through ...

Claims

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Application Information

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IPC IPC(8): G01M7/02
Inventor 杨建民陈刚胡志强姚宗肖龙飞
Owner SHANGHAI JIAO TONG UNIV
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