Deep-sea pipeline segmented model bidirectional forced vibration experimental device under action of uniform flow

Abstract

The invention provides a deep-sea pipeline segmented model bidirectional forced vibration experimental device under the action of uniform flow. The deep-sea pipeline segmented model bidirectional forced vibration experimental device comprises a deep-sea pipeline module, false body modules, a horizontal sliding module, a vertical sliding module, a measurement analysis and control module and a false bottom module, wherein the two ends of the deep-sea pipeline module are connected with the end part false body modules respectively; the vertical sliding module is connected with the end part false body modules and the horizontal sliding module respectively; the horizontal sliding module is fixedly connected with the bottom of a trailer truck; the measurement analysis and control module is arranged on the trailer truck, and is connected with two end part false body modules and two sliding modules respectively; and the false bottom module is fixedly connected with the trailer truck. In the experimental device, a false bottom plate is arranged, so that the surface effect of the sea bottom can be simulated; the coupling of a pipe fitting with a flow field is realized; the vibration of two freedom degrees of forward flow and vertical flow are considered; special end part false body modules are adopted, so that the problem of boundary effects on both sides of a deep-sea pipeline model is solved; and the practical Reynolds number range can be reached under the experimental condition.

Description

Technical field [0001] The invention belongs to the field of ocean engineering, and in particular relates to a bidirectional forced vibration experiment device for a deep-sea pipeline segmented model under uniform flow. Background technique [0002] Submarine pipelines are laid on the rugged seabed. Due to the unevenness of the seabed contour and the combined effects of seabed undercurrents and tides, in certain areas of the pipeline laying path, the pipeline is exposed to form a suspended section. Under the long-term action of environmental load, the suspended section is extremely prone to fatigue failure. Among the various failure modes, vortex-induced vibration has the highest probability of occurrence and the most harmful, that is, the periodic shedding of the vortex on the pipeline causes the transverse and flow direction alternating external forces acting on the pipeline, causing the object to vibrate. [0003] Under the above conditions, the height of the suspended part of ...

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Problems solved by technology

However, in order to have a deeper understanding of the vibration of submarine pipelines, the mutual coupling between pipe fittings and flow fields must be taken into account. Unfortunately, few scholars have done work in this area

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