Analysis on Fluid-Structure Interaction Vibration Characteristics of Pipelines in Typical Gas Transmission Yards
The problem of excessive vibration of gas transmission station pipelines seriously threatens the safe operation of the station yard,and the three-way pipeline,as a key part of the gas transmission station that is prone to vibration problems,has received extensive attention from researchers.In this paper,the bidirectional fluid-structure interaction analysis method was used to study the double-in,single-output three-way manifold.The deformation map and stress distribution map of the pipeline structure were calculated,from which the position with the largest vibration response of the pipeline was obtained.The vibration displacement,velocity,and acceleration over time at that location were analyzed.The pulsation pressure amplitude and the outer diameter of the branch pipe were changed,and the influence of the pulsating pressure amplitude and the outer diameter of the pipe on the vibration characteristics of the pipeline was explored.The results showed that with the increase of pulsation pressure amplitude from 2 MPa to 5 MPa,the vibration displacement of the pipeline increased by 0.95 times,the speed and acceleration increased by 3.5 times,the outer diameter of the pipe decreased from 48 mm to 40 mm,the vibration displacement of the pipe is reduced to 3/4 of the original size,and the velocity and acceleration are reduced to 2/3 of the original amount.The analysis results have certain guiding significance for the process design and structural design of gas transmission station pipelines.
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