Optical-refraction-based test device and test method for wake flow bleeding in vortex-induced vibration

A vortex-induced vibration and test device technology, which is used in fluid dynamics tests, measurement devices, and testing of machine/structural components, etc., can solve problems such as polluting water bodies and inability to accurately reflect the release of vortex-induced vibration wakes.

CN110375953AActive Publication Date: 2019-10-25ZHEJIANG OCEAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-10-25

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Abstract

The invention relates to a display test technique for wake flow bleeding during vortex-induced vibration, especially to an optical-refraction-based test device and test method for wake flow bleeding in vortex-induced vibration. The test device comprises a linear light source and a water tank provided with circulating water. A display screen is connected in the water tank in an up-down sliding manner. A base is arranged at the bottom of the water tank. A glass tube penetrating the display screen is fixed on the base. A camera is arranged on the side wall of the water tank. Therefore, water is protected from being polluted; and the wake flow bleeding of vortex-induced vibration is reflected accurately.
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Description

technical field

[0001] The invention relates to a display test technology for wake discharge during vortex-induced vibration, in particular to a test device and a test method for wake discharge of vortex-induced vibration based on optical refraction. Background technique

[0002] In the field of engineering, the phenomenon of vortex-induced vibration poses a lot of problems, and the research work on it is also very extensive. Under the action of air, water and other fluids with a certain flow rate, the tail will generate alternating vortices, resulting in a pulsating pressure difference on both sides of the object, which will cause the vibration of the structure, such as high-voltage cables, bridges, TV towers, marine risers, etc. The marine riser is an important part of the offshore platform. It is used for the transmission of oil and gas on the seabed. The vortex-induced vibration of the marine riser will cause fatigue damage to the structure. The vortex-induced vibration ...

Examples

Embodiment 1

[0029] Such as figure 1 with 3 As shown, a vortex-induced vibration wake discharge test device based on optical refraction includes a linear light source 1 and a water tank 14 provided with circulating water. The circulating water in the water tank 14 is used to create flow, and the water tank 14 slides up and down to connect with a display. The screen 5, the display screen 5 can slide up and down in the water tank 14, the bottom of the water tank 14 is provided with a base, the glass tube 2 that runs through the display screen 5 is fixed on the base, the side wall of the water tank 14 is provided with a camera 3, and the water flow in the tank After passing through the glass tube 2, a vortex wake is generated near the water surface, and the linear light source 1 obliquely shoots into the water surface in the wake area, and the light is refracted and presented on the display screen 5. According to the actual situation, the display screen 5 can be adjusted in the tank 14 The p...