汽车工程 ›› 2021, Vol. 43 ›› Issue (9): 1336-1342.doi: 10.19562/j.chinasae.qcgc.2021.09.010

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汽车风阻系数灵敏度分析方法研究

郑鑫1,2(),苏东海1   

  1. 1.沈阳工业大学机械工程学院,沈阳 110870
    2.华晨汽车工程研究院,沈阳 110141
  • 收稿日期:2021-03-22 修回日期:2021-05-06 出版日期:2021-09-25 发布日期:2021-09-26
  • 通讯作者: 郑鑫 E-mail:mogon@163.com

Research on Sensitivity Analysis Method of Vehicle Drag Coefficient

Xin Zheng1,2(),Donghai Su1   

  1. 1.School of Mechanical Engineering,Shenyang University of Technology,Shenyang 110870
    2.Brilliance Auto,Shenyang 110141
  • Received:2021-03-22 Revised:2021-05-06 Online:2021-09-25 Published:2021-09-26
  • Contact: Xin Zheng E-mail:mogon@163.com

摘要:

通过对风阻系数敏感度的理论推导,寻找影响风阻系数的车身造型面关键部位,根据获得的灵敏度,采用自动变形技术,实现网格对影响风阻系数的造型面变化的自学习和自判断,最终达到汽车风阻自动优化的目的。对某款SUV风阻的灵敏度分析,验证了灵敏度方法和自动变形技术在空气动力学风阻计算中应用的有效性,计算全过程无需人工介入,即可使风阻系数达到预设的目标值。

关键词: 风阻系数, 灵敏度, 自动变形, 网格自学习, 自判断

Abstract:

Through the theoretical derivation of drag coefficient sensitivity, the key locations of car body styling surface affecting drag coefficient are found out. According to the sensitivities obtained, automatic deformation technology is adopted to realize the grid self?learning and self?judgment of the changes of styling surface affecting drag coefficient, and finally achieve the goal of automatic optimization of vehicle aerodynamic drag. By the drag coefficient sensitivity analysis for a SUV, the effectiveness of the application of the sensitivity analysis and automatic deformation technology to the calculation of aerodynamic drag coefficient is verified. The method can reach the preset target value of drag coefficient without manual involvement in the whole process of calculation.

Key words: drag coefficient, sensitivity, automatic deformation, grid self?learning, self?judgment