Optimization of a variable-stiffness skin for morphing high-lift devices
Optimization of a variable-stiffness skin for morphing high-lift devices
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DOI：
10.1088/0964-1726/19/12/124010
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发表时间：
2010-12-01
影响因子：
4.1
通讯作者：
Gurdal, Z.
中科院分区：
文献类型：
--
作者：
Thuwis, G. A. A.;Abdalla, M. M.;Gurdal, Z.
下一代智能高升力装置的可能性之一是使用无缝变形结构。提出了一种被动复合材料变刚度蒙皮，以解决结构设计具有足够高的刚度以承受气动载荷和低刚度以实现变形的难题。变刚度蒙皮是通过允许变形增升系统上的空间纤维角和蒙皮厚度变化来实现的。刚度分布被定制以有利地影响结构的变形。为了设计一个真实的刚度分布，在优化过程中考虑气动载荷和驱动载荷是很重要的。为此建立了一个二维气动伺服弹性框架。使用基于梯度的优化器执行皮肤优化，其中通过应用伴随方法找到灵敏度信息。执行的气动伺服弹性环境的地址和初步优化结果。结果表明，变刚度蒙皮增加了设计空间。此外，还证明了在优化过程中考虑蒙皮变形引起的气动载荷变化的重要性。
One of the possibilities for the next generation of smart high-lift devices is to use a seamless morphing structure. A passive composite variable-stiffness skin as a solution to the dilemma of designing the structure to have high enough stiffness to withstand aerodynamic loading and low stiffness to enable morphing is proposed. The variable-stiffness skin is achieved by allowing for a spatial fibre angle and skin thickness variation on a morphing high-lift system. The stiffness distribution is tailored to influence the deformation of the structure beneficially. To design a realistic stiffness distribution, it is important to take aerodynamic and actuation loads into account during the optimization. A two-dimensional aero-servo-elastic framework is created for this purpose. Skin optimization is performed using a gradient-based optimizer, where sensitivity information is found through application of the adjoint method. The implementation of the aero-servo-elastic environment is addressed and initial optimization results presented. The results indicate that a variable-stiffness skin increases the design space. Moreover, the importance of taking the change in aerodynamic loads due to morphing skin deformation into account during optimization is demonstrated.