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针对弹性后掠翼飞机在使用试验气动力分析时所出现的副翼反效问题,利用遗传算法对机翼结构进行优化.弹性飞机副翼效率计算采用试验气动力.重点针对一个发生副翼反效的严重飞行状态点进行了机翼结构优化,对比分析了优化前后副翼效率、相同副翼偏度下所产生的滚转率随飞行动压的变化及颤振特性的变化.并比较了基于试验气动力的情况下只针对单一飞行攻角的优化结果和同时考虑多个飞行攻角的优化结果,分析了飞行攻角对优化结果的影响.结果证明:利用结构优化方法可有效在详细设计阶段解决弹性飞机严重飞行状态点副翼反效问题,并且优化结果对飞机颤振特性基本无影响.
In order to solve the problem of the aileron countermeasure when using the experimental aerodynamic analysis, the wing structure is optimized by using genetic algorithm.Analytical calculation of the aileron efficiency of the elastic aircraft uses the test aerodynamic force, The results show that the aileron efficiency before and after optimization and the change of roll rate under the same aileron deviation with flight dynamic pressure and flutter characteristics are compared and analyzed. Based on the experimental aerodynamics, only the optimization results of the single-flight attack angle and the optimization results of multiple flight angles are considered simultaneously, the effect of flight attack angle on the optimization results is analyzed. The results show that the structural optimization method can be used in detail In the design stage, the aileron reversal problem of the severe flight state of the flexible aircraft is solved, and the optimization result has no effect on the flutter characteristics of the aircraft.