Experimental device for simulating vortex-induced vibration of submarine pipeline in complex marine environment

Abstract

The invention discloses an experimental device for simulating vortex-induced vibration of a submarine pipeline in a complex marine environment. The experimental device comprises a water tank, whereina false bottom is arranged at the bottom end in the water tank; a supporting frame is arranged at the top end of the water tank; a supporting transverse plate is arranged at the bottom end of the supporting frame; a horizontal guide rail is arranged at the bottom of the supporting transverse plate; a vertical bracket is arranged at the bottom end of the horizontal guide rail; a vertical sliding rod is arranged in the vertical bracket; L-shaped supporting arms are arranged at the bottom end of the vertical sliding rod; and an adjustable pipeline is arranged between the L-shaped supporting arms.The experimental device disclosed by the invention has the beneficial effects that the experimental device fills the blank that researchers develop a double-degree-of-freedom vortex-induced vibrationcharacteristic research of the submarine pipeline under an actual complex marine environment condition; physical model experimental working conditions under various actual complex marine environmentconditions can be conveniently realized; and a double-degree-of-freedom vortex-induced vibration experimental working condition can be realized and a single-degree-of-freedom vortex-induced vibrationexperimental working condition also can be realized through a limiting stopper, so that a double-degree-of-freedom coupling effect can be conveniently analyzed and synchronous acquisition of pipelinedynamic response, stress and streaming field data can be realized.

Description

technical field [0001] The invention relates to the technical field of simulation experiment devices, in particular to an experiment device for simulating vortex-induced vibration of submarine pipelines in complex ocean environments. Background technique [0002] Because the submarine pipeline has been in the complex marine environment for a long time, the unevenness of the seabed itself and the erosion of the ocean current, the submarine pipeline often appears suspended, and the suspended section is subjected to environmental loads such as wave currents, which can easily cause vortex-induced vibration, which in turn leads to pipeline Fatigue damage will affect the life of the pipeline. Pipeline fatigue damage caused by vortex-induced vibration is the most common factor affecting pipeline safety, and it is also a key and difficult issue that the majority of submarine pipeline designers and researchers have been concerned about. [0003] At present, the research results on v...

AI Technical Summary

Problems solved by technology

The first type of device can only generate uniform flow or oscillating flow, and cannot simulate the actual marine environmental conditions; the second type of device ignores the coupling response of downstream to vortex-induced vibration, and existing studies have shown that small mass ratio pipes with a small mass ratio of downstream to vortex-induced vibration will It has a significant impact on the transverse vortex induced vibration, and the vibration coupling effect between the flow direction and the transverse direction cannot be ignored

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