Vertical pipe vibration testing device and method based on coupling effect of internal flow and external flow and platform

Abstract

The invention relates to a vertical pipe vibration testing device and method under the coupling effect of internal and external flow and a platform. The device is composed of a suspension pipe model, a floating platform system, an internal flow circulating system, a flow field monitoring system, a vibration monitoring system and a data acquisition terminal. The top tension of the suspension pipe model and the immersion depth of the cylindrical floating platform are changed by adjusting a lifting screw, a sliding truss and a circulating water tank water outlet valve, the outflow speed is changed by adjusting the pump frequency of a circulating water tank water pump, and the gas-liquid ratio and flow of gas-liquid two-phase flow are changed by adjusting the opening degrees of a liquid path valve and a gas path valve. Through flow velocity, pressure, displacement and wake flow field information obtained by an acoustic Doppler velocimeter, a pressure sensor, a high-speed camera, a particle imaging velocity measurement camera and a laser displacement sensor, the vibration response rule of the riser under the coupling action of internal and external flow and the platform is analyzed.

Description

technical field [0001] The invention belongs to the technical field of vibration experiment testing of ocean floating platforms and risers caused by flow, and in particular relates to a riser vibration testing device and method for the coupling effect of internal and external flow and platform. Background technique [0002] The rapid development of the economy and society depends on more traditional fossil energy supply, and my country's dependence on foreign oil and gas resources has been rising steadily, which has already broken through the security warning line, and the form of energy security is not optimistic. Therefore, vigorously developing offshore oil and gas resources is one of the effective measures to reduce China's dependence on foreign oil and gas. Floating platform-catenary flexible riser system, as the main way of deepwater offshore oil and gas exploration and transportation, is the equipment that will be widely used in deepwater oil and gas development. How...

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Problems solved by technology

However, there is no experimental device and method for synchronously monitoring the internal flow pattern, riser vibration and floating platform movement.

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