Multi-objective optimization by changing aerodynamic resistance and split shaft lift of the body shape
As the split-axis lift and drag still need further improvement, this paper proposes a styling optimization scheme.By taking an SUV as the research object, we build an SUV flow field simulation model.Then, the aerodynamic characteristics of the external flow field are analyzed, the parts of the body that need to be optimized are determined, and the accuracy of the results of the flow field simulation is verified through wind tunnel tests.We adopt the uniform Latin hypercube to sample the shape, conduct numerical simulation calculations of the external flow field, and establish the correspondence between the shape parameters and the aerodynamic coefficients through the kriging method.Our Pareto frontier solution is generated by the genetic algorithm.Finally, three optimization schemes are proposed to improve the drag coefficient and the front and rear axle lift coefficients comprehensively.The front axle lift coefficient reaches the lowest value and the drag coefficient is reduced by 2.7％.
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