Marine deep water floating platform vortex induced motion model experimental device

Abstract

The invention discloses a marine deep water floating platform vortex induced motion model experimental device which comprises a supporting frame, a vertical connecting mechanism and a horizontal connecting mechanism. The supporting frame comprises a top flat plate, a top fixed device and a horizontal fixed device. The vertical connecting mechanism comprises an air floating platform, a pressure spring and a pressure sensor. The air floating platform is formed by an air compressor, a compressed air supply pipe and an air bearing. The horizontal connecting mechanism comprises a mooring connecting member, a tension spring and a pull force sensor. For the shortage of the prior art, the technical problem that a fine platform vortex induced motion test can not be carried out is solved. The device is suitable for a semi-submersible platform and a tension leg platform in the field of marine engineering technology, while the vertical anchoring load is provided for a deep water floating platform, the technical requirements of horizontal plane free movement is maintained, and the device has the advantages of simple structure, convenient operation, stable operation and so on.

Description

technical field [0001] The invention relates to an experimental device used in the technical field of marine engineering, in particular to a vortex-induced motion model experimental device suitable for deep-water floating platforms such as semi-submersible platforms and tension leg platforms. Background technique [0002] Ocean deepwater floating platforms, including semi-submersible platforms, tension leg platforms, etc., have become one of the important equipment for offshore oil and gas resource exploration and development due to their strong ability to resist wind and waves and adapt to a wide range of water depths. However, semi-submersible platforms and TLPs are typical multi-column floating bodies. Under the action of deep-sea currents, periodic vortex shedding will occur behind the columns, resulting in pulsating pressure, which in turn causes long-period, large-column floating on the platform. Amplitude reciprocating motion. This large-scale vortex-induced motion w...

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Problems solved by technology

However, since the depth of the sea area where the deepwater floating platform is located is extremely deep, and the water depth of each platform varies greatly, while the water depth of the ship towing pool is generally small, it is difficult for this device to simulate the deep-water marine environment, and the structure is relatively cumbersome. It is difficult to effectively implement the actual water depth adjustment to the corresponding depth

Moreover, the airfoil hanging column of the device will generate vortex-induced vibration in the water during the dragging process of the vortex-induced motion experiment, which will affect the test flow field and cause the platform model itself to vibrate, affecting the accuracy of the experiment

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