大展弦比联接翼结构重量估算

联接翼是一种将前翼和后翼连接在一起的飞行器创新布局形式.针对飞机总体设计阶段需要知道飞机结构重量与气动外形参数之间关系的问题,提出了一种建立大展弦比联接翼布局飞机外形参数与结构重量之间关系的方法.该方法首先应用结构有限元的参数化建模和结构优化方法获得联接翼的结构重量,然后应用试验设计法和响应面模型获得外形参数与其结构重量之间的定量关系.应用这种方法,获得了某大展弦比联接翼结构重量与其外形参数(包括前翼展长、后翼展长与前翼展长之比、前翼展弦比、前翼上反角、前翼后掠角、前后翼根弦前缘纵向距离以及前后翼根弦前缘垂直距离)之间的关系.所获的计算结果对联接翼布局飞机总体参数的确定具有参考价值.

Predications of structural weight for high aspect ratio joined-wings

The joined-wing is an innovative aircraft configuration with a structural connection between the front wing and the rear wing.An approach was presented to investigate the dependences of the structural weight of a hign-aspectratio joined-wing on the parameters of its aerodynamic configurations.Such the dependences are essential for the priliminary deisgn of the joined-wing configuration.The approach consists of two steps.The first step is that the joined-wing structural weights were predicated by the combination of parameterized modeling of the finite element method(FEM) with structure optimization method.The second step is that the quantitative relationships between joined-wing configuration parameters and structural weights were explored using the design of experiment(DOE) method and response surfaces model.Based on this approach,the dependences of the wing structural weight of the joined-wing on the configuration parameters were obtained,which indude the span of front wing,the ratio between front wing span and rear wing span,the aspect ratio of front wing,the dihedral of front wing,the sweep of front wing,the longitudinal distance between front and rear wing,and the vertical distance between front and rear wing.The dependences obtained can be used as a guidance for the preliminary sizing of the high-aspect-ratio joined-wing configurations.