Computational Fluid Dynamics Simulation of Aerodynamic Coefficients on Bridge-Vehicle systems

• Main Authors: Kuan-Ting Lai, 賴冠廷
• Other Authors: 張正興
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/41468960422469757503

碩士 === 淡江大學 === 土木工程學系碩士班 === 101 === Use Computational Fluid Dynamics (computational fluid dynamics, CFD) to simulate the wind field around bridge deck section and aerodynamic coefficients more economical than wind tunnel tests.CFD can simulate the pressure of the flow field around the bridge section and speed distribution. And CFD can get the bridge section of aerodynamic coefficients under different wind direction ,that future bridges subjected to the action of the wind in the wind dynamic analysis purposes. This article will use ANSYS FLUENT software as the CFD computational simulation of the wind field grid foundation to simulate the aerodynamic coefficients for rectangle cross-section and the Kaoping bridge cross-section . Using the above results compared with the previous wind tunnel test to illustrate the numerical simulation of turbulent flow model, model appearance and roughness under different wind direction of aerodynamic coefficient. And use this result to simulate aerodynamic coefficient and flow field around the section for Bridge-Vehicle systems Visualization according to the Vehicle-Bridge cross-section of the simulation results observed the change of wind pressure and flow field between cars and bridge, in order to observe the general wind tunnel experiments can''t observed phenomenon. We can use the results of this study provide the CFD simulation settings and simulation mode of the bridge deck section through rapid numerical simulation can be used as the assessment of aerodynamic coefficient before the wind tunnel tests and prepare CFD aeroelastic simulation basic.