斜拉翼结构刚度分布与重量特性

Structural Stiffness Configuration and Weight Property of Strut-Braced Wing

多学科优化设计的研究结果表明,斜拉翼在不增加悬臂翼结构重量的情况下能显著提高展弦比和降低诱导阻力,使得斜拉翼飞机整体性能明显优于悬臂翼设计。但这些研究没有对支撑结构与主翼之间采用何种联接型式给出相应的讨论,也未对机翼刚度布局情况给出相应参考,不利于飞机总体布局方案的选择。本文从力法入手,用四板模型简化斜拉翼结构剖面,给出常见斜拉翼和其支撑结构的刚度布局和联接形式以及结构重量遗传算法寻优的相关结果。结果表明,以铰链方式联接支撑结构与联接段结构的斜拉翼结构布局方式有最好的重量特性。

The studies of multidisciplinary design optimization of the aircraft with strut-braced wing show that the strut-braced wing by using a strut for wing-bending load alleviation can increase the aspect ratio and reduce the induced drag, thus improving the performance over the cantilever wing. But there is no a discussion or a reference about the join type and configuration between the strut and the main wing. It is not convenient for selecting configuration concepts of the aircraft. Based on the force method by using quad plate model to set up the section of the airfoil. This paper gives the optimal stiffness configuration and the join type of the strut-braced wing under minimum structural weight. The result shows that the configuration with a hinge between the strut and the connector has the best a weight characteristic.