本文選題：賽車 + 車身設計　； 參考：《中北大學》2016年碩士論文

【摘要】：賽車車身具有比較低的空氣阻力系數(shù)可以使賽車在行駛時受到更小的空氣阻力,從而提高賽車在加速賽中的最高行駛速度和耐力賽中的行駛里程,取得更好的成績。所以賽車車身空氣動力學優(yōu)化設計是很重要的一項。賽車車身不僅需要低空氣阻力系數(shù),還需要滿足車架的結構約束。為了全面考慮這兩個要求,本文在大學方程式賽車車身設計中,引用理想形體設計法和整體優(yōu)化法從整體的角度對賽車車身進行設計和優(yōu)化。研究車身氣動造型的整體優(yōu)化設計方法在大學方程式大賽賽車上的應用。研究步驟為:1)參考已知理想形體建立低空氣阻力系數(shù)的理想形體三維模型;2)對模型進行CFD仿真驗證理想形體低氣阻性能,3)提取理想模型特征曲線。4)根據(jù)車架結構特征點,生成車架結構曲線;5)把理想形體特征曲線與賽車車架結構曲線進行融合,生成賽車車身曲線,并建立賽車幾何模型;6)對賽車車身三維模型進行CFD仿真獲得車身空氣動力學性能參數(shù),并運用整體優(yōu)化方法對賽車車身進行整體優(yōu)化;7)對優(yōu)化后賽車進行CFD仿真,并對仿真結果與前代賽車仿真結果進行對比分析。從研究結果顯示,通過理想形體融合曲線建立的賽車車身幾何模型,很好的保留了理想形體低氣阻特性。同時在優(yōu)化過程中,運用整體優(yōu)化法對車身進行優(yōu)化,極大的降低了優(yōu)化工作量,提高了設計效率,并降低了局部優(yōu)化之間產生的干擾,很好的延續(xù)了低氣阻特性。最終CFD仿真結果對比顯示,應用氣動造型整體優(yōu)化設計方法設計的車身較前代設計方案,空氣阻力系數(shù)降低12.5%。
[Abstract]:The lower air resistance coefficient of the car body can make the car suffer less air resistance while driving, thus increasing the maximum speed and mileage of the race in the acceleration race, and getting better results. So the aerodynamics optimization design of the car body is very important. The car body not only needs low air resistance coefficient, but also needs to meet the structural constraints of the frame. In order to fully consider these two requirements, the ideal shape design method and the overall optimization method are used in the design of the car body of the university formula racing car body. The design and optimization of the car body are carried out from the overall point of view. This paper studies the application of the whole optimization design method of the body aerodynamic modeling in the university formula race car racing. The steps of the study are: (1) establishing a three-dimensional model of an ideal body with low air drag coefficient with reference to a known ideal body. (2) the model is verified by CFD simulation. (3) the characteristic curve of the ideal model is extracted. 4) according to the characteristic points of the frame structure, Generating frame structure curve 5) combining the ideal shape characteristic curve with the racing frame structure curve to generate the car body curve, The 3D model of the car body is simulated by CFD to obtain the aerodynamic performance parameters of the car body, and the overall optimization of the car body is carried out by using the overall optimization method (7) the CFD simulation of the optimized car body is carried out. The simulation results are compared with the previous race car simulation results. The results show that the geometry model of the car body established by the fusion curve of ideal body retains the characteristics of low air resistance of ideal body. At the same time, in the process of optimization, the whole optimization method is used to optimize the body, which greatly reduces the optimization workload, improves the design efficiency, and reduces the interference between local optimization. Finally, the results of CFD simulation show that the air resistance coefficient of the body designed by the aerodynamic modeling optimization design method is 12.5% lower than that of the previous design scheme.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：U469.696;U461.1

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