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传统的工程梁方法在估算机翼结构重量时,展向气动载荷多采用椭圆、Schrenk或三角分布假设,对估算结果的精度造成了一定影响。本文针对客机总体方案设计阶段机翼重量估算的实际需求,采用气动分析的计算结果对工程梁方法进行了改进,以PAN AIR的机翼展向气动载荷分布代替传统工程梁方法的展向载荷分布假设,计算客机机翼承力结构的重量,继承了工程梁方法快速、简便的优点,克服了传统工程梁方法气动载荷精度不足的缺点。通过对B747-21P和A320-200机翼重量的验证,表明改进后的工程梁方法提高了机翼重量估算的精度。
In the traditional engineering beam method, when estimating the weight of the wing structure, the aerodynamic load of the exhibition is mostly elliptic, Schrenk or trigonometric distribution hypothesis, which has a certain impact on the accuracy of the estimation results. In this paper, aiming at the actual demand of wing weight estimation in the overall design stage of passenger aircraft, the method of aerodynamic analysis is used to improve the method of engineering girder. The aerodynamic load distribution of PAN AIR is replaced by the span load of traditional engineering girder Assuming that calculating the weight of the aircraft wing bearing structure and inheriting the advantages of the method of construction beam quickly and simply, the defect that the aerodynamic load of the traditional engineering beam method is insufficient is overcome. The verification of wing weight of B747-21P and A320-200 shows that the improved beam method improves the accuracy of wing weight estimation.