Experimental device and method for simulating scouring and vortex-induced vibration of flexible pipeline

Abstract

The invention relates to an experimental device and method for simulating scouring and vortex-induced vibration of a flexible pipeline. The experimental device comprises a circulating water tank, a support frame, a pipeline model, a universal joint, a water tank wall, a high-speed camera, a laser displacement sensor, fiber bragg grating strain sensors, measuring probes, a guide plate, a tension meter, weights, a moving rail, pulleys, a hanging beam, a multi-beam echosounder, an ultrasonic current meter ADV, a sliding rail and a fixed rail; a plurality of measuring probes are installed at the bottom of the pipeline model, strain measuring points are determined on the surface of the pipeline model at equal intervals along the axial direction, each strain measuring point is equipped with a left fiber bragg grating strain sensor and a right fiber bragg grating strain sensor in the circulating water tank along the water flow direction, and the left and right fiber bragg grating strain sensors are symmetrically arranged on the horizontal outer surface of the pipeline model; one end of the sliding rail is connected with the pipeline model, the other end of the sliding rail is connected with a steel wire rope, and the sliding rail can slide back and forth relative to the support. The device and the method can be used for research of the flexible pipeline and local scouring extension and measurement of the vortex-induced vibration frequency, the amplitude and the pipeline strain.

Description

technical field [0001] The invention relates to the technical fields of marine, petroleum and natural gas engineering, in particular to an experimental device and method for simulating the scouring and vortex-induced vibration of flexible pipelines. Background technique [0002] Submarine pipelines are the lifeline of marine, oil, and natural gas transportation, and are widely used because of their advantages of safety, speed, economy, reliability, and continuous airtight transportation. However, submarine pipelines are exposed to the harsh marine environment for a long time, and bear complex workloads, environmental loads and unexpected risk loads, and have a high probability of failure. Once a failure occurs, it is difficult to replace or repair quickly, which will not only cause huge economic losses, but also cause serious marine environmental pollution and cause serious economic losses. Under the action of waves and ocean currents, the pipelines laid on the seabed are p...

AI Technical Summary

Problems solved by technology

However, from the perspective of actual conditions, the damage of submarine pipelines is not a single effect, but is affected by the coupling effect of scour and vortex induced vibration

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