A multi-span support device for vortex-induced vibration test of multi-span submarine pipelines

Abstract

The invention discloses a multi-span support device for a pipeline model in a vortex-induced vibration test of a multi-span submarine pipeline, comprising a fixed support column, a rotatable support column and a plurality of pipeline model support clamps; the top of the fixed support column and the middle part are respectively provided with a connecting plate, the bottom of the fixed support column is fixed with a fixed plate, the fixed plate and the fixed support column are vertically arranged, and the fixed plate is provided with two first through holes; The top of the rotatable support column is fixed with an angle fixed plate, and the two sides of the middle part of the rotatable support column are welded with rope reinforcement structures, and the bottom of the rotatable support column is connected with a pipeline model clamp; four pipeline model clamps The included angles between the axis of the upper supporting hole and the thickness direction of the plate body are 0 degree, 15 degree, 30 degree and 45 degree respectively. The present invention can be used as a support for a model of a submarine pipeline that flows down vertically, and can also be used as a support for a model of a submarine pipeline that flows down at an inclination (that is, the incoming flow is not perpendicular to the submarine pipeline).

Description

technical field [0001] The invention relates to a test device in the technical field of marine engineering, in particular to an auxiliary device for applying multi-span support. Background technique [0002] With the increasing scarcity of land oil and gas resources, people focus more on the development of offshore oil and gas. As the lifeline of offshore oil and gas exploration and transportation, the number of submarine pipelines is increasing year by year. Due to the complex terrain and harsh environment of the deep seabed, the submarine pipeline will inevitably form suspended spans, or even multiple spans. When seawater flows through the spanning pipeline, alternate vortex shedding will occur at the trailing edge of the pipeline. When the vortex shedding frequency is close to the natural vibration frequency of the pipeline, the vibration of the pipeline will force the vortex shedding frequency to be fixed near the natural vibration frequency of the pipeline, thus "lockin...

AI Technical Summary

Problems solved by technology

The root cause of the above situation is the lack of reasonable test equipment to simulate the shoulder-span support of multi-span pipelines, and it is applicable to different flow modes.

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