Vortex-induced vibration suppression experimental device based on nonlinear energy trap

Abstract

The invention discloses a vortex-induced vibration suppression experimental device based on a nonlinear energy trap. The vortex-induced vibration suppression experimental device comprises an experimental water tank, a connecting and fixing device and a vibration damping device, wherein a water tank cover is arranged on the top of the experimental water tank; the connecting and fixing device comprises guide rails, a test piece, a support and a first spring, the guide rails are fixed on the inner walls of two opposite sides of the experimental water tank, the lower end of the support is connected with the test piece, the upper end of the support is connected with the first spring, and the cylindrical test piece and the support slide up and down along the guide rails; the vibration damping device comprises a stainless steel square box, a nonlinear spring and a linear damper, and the bottom surface of the stainless steel square box is connected with the first spring downwards; the bottom of the nonlinear spring and the bottom of the linear damper are connected with the stainless steel square box, and the top of the nonlinear spring and the top of the linear damper are connected with the water tank cover; a plurality of slots are formed in the side surface of the stainless steel square box, and mass sheets are selectively inserted into the slots. The vortex-induced vibration suppression experimental device provided by the invention is simple in structure, various adjustable parameters such as design mass, rigidity and damping are designed, and vortex-induced vibration can be effectively suppressed.

Description

technical field [0001] The invention relates to a vortex-induced vibration suppression experimental device based on a nonlinear energy well, belonging to the technical field of marine engineering. Background technique [0002] The submarine pipeline connects the submarine resources and the surface platform, and undertakes important tasks such as information exchange, liquid guiding, mud guiding and drilling. It is the weakest link of the entire platform system. Once an accident occurs, it will affect the normal operation of the entire system. At the same time, it may cause major accidents such as oil spills. Vortex-induced vibration is one of the main causes of damage to submarine pipelines. Under its action, the pipeline is likely to cause fatigue or even direct structural damage. [0003] At present, the vortex-induced vibration suppression method of pipelines in offshore engineering is mainly passive suppression, and there are three types of measures: affecting the separ...

AI Technical Summary

Problems solved by technology

These schemes are essentially based on the principles of fluid mechanics, by changing the shape of the surface or cylinder, interfering with and changing the conditions for vortex generation and the wake flow state, although they can achieve certain results, but there are difficulties in installation, complex processes, and influence by parameters major disadvantages

Images