Test water tank for vortex-induced vibration test of suspended spanning pipeline

Abstract

The invention discloses a test water tank for a vortex-induced vibration test of a suspended spanning pipeline. The test water tank is a cuboid with an opening formed in the upper end surface, and isdivided into a test section and a drainage section by means of a water flow partition plate. The test water tank is provide with a flow direction diversion device, a power adjustable device, a stablewater flow device, a suspended spanning pipeline suspending device, a position adjusting device and a data acquisition device. In the test water tank disclosed by the invention, an upper flow straightener can be moved equidistantly, a flat flow plate is installed in a slot manner, the slot can achieve the anti-collision effect, a thin and long hole is formed to achieve a buffering effect, the disassembly and assembly test is facilitated, the structural installation is reasonable, the suspended spanning pipeline has multiple pipe diameters for the tests of different pipe diameters, lateral andforward springs are convenient for installation and disassembly, a cylindrical suspension plate and a splicing plate are movable and replaceable, tests of water flows in different flow directions canbe conducted, and the test water tank is simple and compact in structure.

Description

technical field [0001] The invention relates to the structural design of a test tank device for testing the vortex-induced vibration of a suspended pipeline, in particular to a test tank for testing the vortex-induced vibration of a suspended pipeline. Background technique [0002] Vortex-induced vibration is a special vibration form of the suspended pipeline under the action of the flow field. It is the vibration caused by the vortex shedding at the wake of the suspended pipeline under the action of the flow field at a certain flow rate. In order to grasp the mechanism and law of the eddy current vibration of the suspended pipeline, the vortex-induced vibration of the suspended pipeline is often studied by the method of physical experiment. Existing testing devices for vortex-induced vibration of suspended pipelines often generate a uniform flow field through a test tank, and use ultrasonic displacement sensors and related equipment to test the lateral vibration or flow dir...

AI Technical Summary

Problems solved by technology

The device and method of the suspended pipeline vortex induced vibration test test often have the deficiencies in the following three aspects: (1) the generation of uniform flow field, the current test tank, the power unit often uses a water pump to promote the water flow, and the generated water flow is easy to surge and turbulence, a rectification is performed through the rectification grid, although the water flow can be smoothed, but the flow field is still not very uniform; (2) In terms of suspension of the suspension pipeline, two springs are often used to suspend the suspension pipeline at both ends of the suspension pipeline The pipeline is in the flow field, so the suspended pipeline only has horizontal elastic support, but no elastic support in the flow direction, so it is difficult to reasonably simulate the action of the seabed soil on the submarine suspended pipeline; Sensors and related equipment tests test the vortex-induced vibration of the suspended pipeline, and it is difficult to test the two-degree-of-freedom vibration of the suspended pipeline in the flow direction or lateral direction at the same time

When testing the flow direction or lateral vibration of the suspended pipeline at the same time, due to the vibration in the other direction of the suspended pipeline, the movement of the obstacle in the suspended pipeline will cause the reflection surface to change, which will affect the measurement of the flow direction or lateral amplitude of the suspended pipeline As a result, experimental results resulting in inaccurate experimental results for the frequency of vibrations in the flow direction of the suspended pipe

Images