Deep-sea riser segmented model vertical flow forced vibration experimental device under action of uniform flow

Abstract

The invention is suitable for the field of ocean engineering and provides a deep-sea riser segmented model vertical flow forced vibration experimental device under the action of uniform flow. The deep-sea riser segmented model vertical flow forced vibration experimental device comprises a deep-sea riser module, false body modules, a fixing module, a sliding module and a measurement analysis and control module, wherein the two ends of the deep-sea riser module are connected with the end part false body modules respectively; the sliding module is connected with the end part false body modules and the fixing module respectively; the fixing module is fixedly connected with the bottom of one end of a trailer truck; and the measurement analysis and control module is arranged on the trailer truck, and is connected with the end part false body modules and the sliding module respectively. In the experimental device disclosed by the invention, a riser model with an appropriate slenderness ratiois selected, so that the practical Reynolds number of 106 can be reached under the experimental condition, and the scale effect is avoided effectively; and meanwhile, end part false bodies are adopted, so that the problem of boundary effects on both sides of the model during an experiment is solved.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to a vertical incoming flow forced vibration experiment device of a deep-sea riser section model under the action of uniform flow. Background technique [0002] The risers in the actual marine environment are all slender and flexible structures, which will generate vortex-induced vibrations under the action of ocean currents. This kind of vibration is self-excited for the whole riser; but if considering that each section can be regarded as a segment of a rigid body, then this kind of vibration is a forced oscillation. Since each small part of the flexible riser can be regarded as a rigid cylinder, if we want to study the vortex-induced vibration characteristics of the slender flexible marine riser under the action of the ocean current in the real environment, we can start with the simple microscopic problem, namely The force, motion response, and wake shape of a rigid ...

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Problems solved by technology

[0005] The present invention aims at the technical problems existing in the above-mentioned prior art, and provides a deep-sea riser segmental model vertical flow forced vibration experiment device with uniform flow, aiming to solve the problem that the existing test device can only simulate low Reynolds number sea conditions, and There is no problem of boundary treatment for riser segments, which avoids the influence of scale effects and boundary effects on experimental results

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