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首页> 外文期刊>Journal of aerospace engineering >Efficient Multiobjective Optimization of Amphibious Aircraft Fuselage Steps with Decoupled Hydrodynamic and Aerodynamic Analysis Models
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Efficient Multiobjective Optimization of Amphibious Aircraft Fuselage Steps with Decoupled Hydrodynamic and Aerodynamic Analysis Models

机译：分离的水动力和空气动力分析模型的两栖飞机机身台阶高效多目标优化

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This paper proposes an efficient framework for multiobjective optimization of the fuselage step on a large amphibious aircraft using a combination of computational aerodynamic and hydrodynamic methods. Both cruise drag and water take-off resistance and distance are calculated to evaluate the effects of the two key parameters, the longitudinal location and the depth of the step. A Reynolds-averaged Navier-Stokes (RANS) model was used for the calculation of cruise drag of the wing body configuration. Water take-off resistance and distance required for the baseline configuration were calculated using a volume of fluid method for hydrodynamic calculation and RANS method for aerodynamic calculation, respectively. A drag breakdown method was adopted to improve the efficiency of the hydraulic calculations. The method can achieve an accuracy of less than 5% difference compared to fully viscous calculations with only half of the computational time. The optimization is achieved using a combination of design of experiment and the response surfaces method. The optimized step configuration achieved an 18% improvement in take-off distance while maintaining similar cruise performance. The proposed method is generic and can be used in the optimizations of other components such as wings and fuselage geometries of amphibious aircraft. (C) 2015 American Society of Civil Engineers.
机译：本文提出了一种结合计算气动和流体动力学方法对大型两栖飞机机身步骤进行多目标优化的有效框架。计算巡航阻力和起飞阻力和距离，以评估两个关键参数（纵向位置和台阶深度）的影响。使用雷诺平均Navier-Stokes（RANS）模型计算机翼构型的巡航阻力。分别使用流体体积法（用于流体动力学计算）和RANS方法（用于空气动力学计算）来计算基线配置所需的抗水性能和距离。采用了阻力分解法来提高水力计算的效率。与仅使用一半计算时间的全粘性计算相比，该方法可以实现小于5％的精度差异。优化是结合实验设计和响应面方法来实现的。优化的踏板配置使起飞距离提高了18％，同时保持了类似的巡航性能。提出的方法是通用的，可用于优化其他组件（如两栖飞机的机翼和机身几何形状）。 （C）2015年美国土木工程师学会。

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