Deep-sea tensioned single riser vortex-induced vibration test device under inclination step flow condition

Abstract

The invention discloses a deep-sea tensioned single riser vortex-induced vibration test device under inclination step flow conditions, including a marine riser model, a transverse test support frame, a trailer, a strain acquisition instrument and a computer, and two ends of the marine riser model There is an end support device connected with the horizontal test support frame, and the horizontal test support frame is fixed on the bottom of the trailer; the marine riser model includes several wires and a thin-walled copper pipe, and the shaft section at one end of the marine riser model is equipped with a streamlined Fairings, wires and tension transducers are connected to strain gauges. The invention can realize vortex-induced vibration test observation of deep-sea riser with large Reynolds number and large length-to-diameter ratio. At the same time, the device of the invention has simple design, convenient installation and debugging, and low cost, which is indispensable for vortex-induced vibration test research of deep-sea riser The device measures make up for the lack of deep-sea tensioned single riser vortex-induced vibration test equipment in the academic circles, which has important promotion and application value and scientific significance.

Description

technical field [0001] The invention relates to a test device in the technical field of marine engineering, in particular to a test device for vortex-induced vibration of deep-sea tensioned riser bundles under the condition of stepped incoming flow at an inclination angle. Background technique [0002] The riser system is an indispensable key part of the deep sea oil exploitation system. The riser connects the subsea oil and gas field and the offshore operation platform, so that the offshore operation platform can carry out drilling, liquid guiding, mud guiding and other work. As oil and gas exploitation moves into the deep sea, the operating water depth of the riser is also increasing. In the deep water area, the damage to the riser caused by waves and hull motion on the sea surface gradually weakens, but the current has become the main factor causing riser damage. The effect of ocean currents has a wide range of water depths. When the ocean current passes through the ocea...

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Problems solved by technology

However, this device cannot realize the step-like incoming flow condition of the inclination angle.

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