Deep sea standpipe segment model bidirectional forcing vibration experimental apparatus under effect of oblique uniform flow

Abstract

The invention is applied to the sea engineering field, and provides a deep sea standpipe segment model bidirectional forcing vibration experimental apparatus under an effect of an oblique uniform flow. The apparatus comprises a deep sea standpipe module, a first end prosthese module, a second end protheses module, a first horizontal sliding module, a second horizontal sliding module, a first vertical sliding module, a second vertical sliding module and a measurement analysis control module, wherein, two ends of the deep sea standpipe module connect with the first end prosthese module and the second end prostheses module respectively, the first vertical sliding module connects with the first end prosthese module and the first horizontal sliding module respectively, the second vertical sliding module connects with the second end prosthese module and the second horizontal sliding module respectively, the first horizontal sliding module is fixedly connected with a bottom of a trailer, the deep sea standpipe module is installed to form a certain angle with the first vertical sliding module and the second vertical sliding module, and the measurement analysis control module is installed on the trailer and is connected with the two end prosthese modules, two vertical sliding modules and two horizontal sliding modules. In the invention, a large scale standpipe segment is employed, thus an experimental Reynolds number is in a 106 range to avoid a scale effect. According to the experimental apparatus disclosed in the invention, bidirectional force movement is employed, a special ocean condition that an inflow is not perpendicular to a standpipe is simulated, a standpipe vortex induced vibration form is simulated factually, and end prosthese is employed to solve a problem that two sides of a model appear a boundary effect in an experiment.

Description

technical field [0001] The invention belongs to the field of marine engineering, and in particular relates to a bidirectional forced vibration experiment device of a deep-sea riser section model under the action of oblique 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 c...

AI Technical Summary

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 bidirectional forced vibration experiment device with oblique uniform flow, aiming at solving the problem that the existing test device can only simulate low Reynolds number sea conditions, only The single-degree-of-freedom forced vibration can be used to simulate vortex-induced vibration, and the special sea conditions where the incoming flow is not perpendicular to the riser cannot be simulated, and there is no problem of boundary treatment for the riser segment

Images