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

A segmented model, forced vibration technology, applied in the field of marine engineering to avoid scale effects

CN102359855BActive Publication Date: 2013-06-19SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2013-06-19

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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.
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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...

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0031] Such as figure 1 , figure 2 and image 3 As shown, the device includes: a deep sea pipeline module 1, a first end prosthesis module 2, a second end prosthesis module 3, a first sliding module 4, a second sliding module 5, a first fixing module 6, a second The fixed module 7, the measurement analysis control module 8 and the false bottom module 11, wherein: the two ends of the deep-sea pipeline module 1 are respectively connected with the first end prosthesis module 2 and the second end prosthesis module 3, and the first sliding module 4 is respectively It is connected with the first end ...