An experimental device for simulating vortex-induced vibration of submarine pipelines in complex ocean environments

Abstract

The invention discloses an experimental device for simulating the vortex-induced vibration of a submarine pipeline in a complex ocean environment, comprising a water tank, a false bottom is provided at the inner bottom of the water tank, a support frame is provided at the top of the water tank, and a support horizontal plate is provided at the bottom of the support frame to support There is a horizontal guide rail at the bottom of the horizontal plate, a vertical bracket is provided at the bottom of the horizontal guide rail, a vertical slide bar is provided inside the vertical support bar, an L-shaped support arm is provided at the bottom of the vertical slide bar, and an adjustable support arm is provided between the L-shaped support arms. pipeline. Beneficial effects: The experimental device makes up for the gaps in the research of the double-degree-of-freedom vortex-induced vibration characteristics of submarine pipelines under actual complex marine environmental conditions, and can conveniently realize a variety of physical model experimental conditions under actual complex marine environmental conditions. It can not only realize the experimental condition of double-degree-of-freedom vortex-induced vibration, but also realize the experimental condition of single-degree-of-freedom vortex-induced vibration through the limiter, so as to conveniently analyze the coupling effect of double-degree Synchronous acquisition of force and flow field data.

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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