基于参数化离散结构模型的飞行器机翼质量预测方法

Calculation Method of Wing Weight of Cruise Vehicle Based on Parameterization Discrete Structure Model

为快速准确地预测不同设计参数条件下的机翼质量,提出了基于参数化离散结构模型的飞行器机翼质量计算方法。对采用参数化设计的机翼离散化处理,构建连续的机翼段单元模型;其次,考虑各段机翼蒙皮、翼肋、翼梁等结构的气动载荷、单元结构尺寸及质量,基于工程梁计算方法估算出各离散单元的精细化质量,进而得到机翼的整体质量计算模型;采用多学科优化平台Isight将本文构建的机翼外形参数化模型、气动载荷、结构质量计算等模块进行集成。最后,以某型飞行器的机翼质量预测作为算例验证,结果显示本文预测方法与经验公式相比估算误差降低1%~5%,可以实现机翼质量的快速准确预测。

To estimate the cruising aircraft’s wing weight under different design parameters rapidly and accurately,a computing method based on discretized parametric-structural model was presented.The parametric wing was discretized to obtain continuous wing sections.The load-bearing situation,unit structure size and structure weight of the skin,rib,and beam of each wing segment was analyzed precisely,and the parameterized model,aerodynamic load analysis and structural weight calculation modules involved in the whole process were integrated into the multi-disciplinary optimization platform Insight for automatic calculation.A small cruise vehicle was chosen as an example to verify this method,the results has shown that the prediction error of this method can be reduced by 1%~5%compared with the empirical formula method,and the proposed method can achieve the purpose of wing weight estimation rapidly and precisely.