Forced vibration experiment facility for uniform down-flowing incoming flow of deep sea pipeline sectional model

Abstract

The invention provides a forced vibration experiment facility for uniform down-flowing incoming flow of a deep sea pipeline sectional model; the forced vibration experiment facility comprises a deep sea pipeline module, a prosthesis module, a fixing module, a sliding module, a measuring and analyzing control module and a false bottom module, wherein both ends of the deep sea pipeline module are respectively connected with the end prosthesis module; the sliding module is respectively with an end prosthesis and the fixing module; the fixing module is fixedly connected with the bottom of a trailer; the measuring and analyzing control module is arranged on the trailer and is respectively connected with the end prosthesis module and the sliding module; and the false bottom module is fixedly connected with the bottom of the trailer. According to the forced vibration experiment facility, the surface effect of a seat floor can be simulated by arranging a false bottom plate under the deep sea pipeline model; the mutual coupling of a pipe fitting and a flow field is realized; by adopting the special end prosthesis module, the boundary effect of two sides of the deep sea pipeline model is solved; and the segmented size of the pipe fitting adopted in the forced vibration experiment facility is similar to the actual pipe fitting; and the working conditions of tests can reach the range of real Reynolds numbers.

Description

technical field [0001] The invention relates to the field of marine engineering, in particular to an experimental device for forced vibration of a vertical incoming flow of a segmented model of a deep-sea pipeline under uniform flow. Background technique [0002] Submarine pipelines are laid on the rugged seabed. Due to the inhomogeneity of the seabed contour, seabed undercurrent, tide and other factors, in some areas along the pipeline laying path, the pipeline is exposed to form a suspended section. Under the long-term action of environmental loads, the suspended section is extremely prone to fatigue failure. Among the various failure modes, vortex-induced vibration has the highest probability of occurrence and is the most harmful, that is, the periodic shedding of the vortex on the pipeline causes the lateral and flow-direction alternating external forces acting on the pipeline, causing the object to vibrate. The academic community agrees that lateral vibration is more s...

AI Technical Summary

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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