| In recent years, median-low structures suffered huge destruction under the conditionof extreme wind. Under the complex and changeable environment, many buildings withinthe limits of bearing will suddenly collapse. Many experts have studied on the wind loadof median-low structures. In this paper, as an object of study in large noise reduction anddust removal pipe of a Wuhan Environmental Protection Equipment Co. Ltd. According tothe basic equations of fluid mechanics and fluid-structure interaction equation, analyze theinternal and external flow field and the structure of the pipe, get the coupling of equivalentstress and deformation of the pipe wall. Detail work was done in this paper as follows.1) This paper first discusses the method of continuum mechanics to describe themotions of obtained the advantages of arbitrary Lagrange Euler (ALE) description ofrelative motion, and gives the basic equations of fluid mechanics inALE.2) Establish the3-d model of the gas-conveying pipe and analyze the internal flowfield in CFX. Get the velocity and pressure distribution of internal flow field. The resultswill be imported into Workbench and get the transformation of the pipe with the one-wayfluid-structure interaction, analyze the reason of stress concentration and optimize it.3) This paper analyze the external flow field of gas transmission pipeline. Get thestress and velocity contours of pipeline. The simulation results show that the pipeline inthe transverse plane of windward maximum positive pressure, negative pressure in thepipe and the leeward side. Longitudinal section showed the pipeline flow field under thesymmetrical distribution, pressure showed small in the middle and both sides is large. Thisis because the air flows through the pipe on both sides will separate. The velocity contourshown in the leeward side has two small eddy zone. At last, solute the deformation of thepipe after interaction.4) Analyze the pipe support statics with considering the gravity and horizontal windload. |
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