逆向迭代的点阵式充气翼三维保形分析

Inverse iterative three-dimensional initial shape analysis of inflatable wing

摘要:

充气翼在充气变形后与预期设计目标之间会产生偏差,这样的偏差会影响充气翼正常工作下的气动外形,不利于充气翼的精细化分析．针对该问题,提出了一种逆向迭代充气翼三维保形分析方法,来寻找目标构型给定下充气翼未加载时的三维初始形态．运用APDL参数化设计完成了对一种新型点阵式充气翼的逆向迭代保形分析,并通过非接触测试进行实验验证．结果表明:逆向迭代法可以有效的得到满足精度要求的充气翼三维初始构型,分析效率高、收敛性好且可靠性高．

Abstract:

The inflatable wing with inflated pressure has a large deflection which leads to a deviation compared with target shape. Such deviation has a great influence on the aerodynamic shape of the inflatable wing, which decreases the precision of structural analysis. In this paper, we proposed a novel inverse iterative method to obtain the accurate 3D initial shape of the unpressured inflatable wing. The initial shape of the Lattice Inflatable Wing is then obtained accurately by combining the inverse iterative method and the APDL program. The non-contact tests are performed to validate the inverse iterative method in the end. The results reveal that the proposed inverse iterative method is an accurate and effective method which may be used to obtain the 3D initial shape of inflatable wing with zero pressure. This method has high computation efficiency, good convergence and reliable characteristic.