Design and tests of the composite wing flutter model
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摘要: 为了进行颤振实验, 依据原始金属模型, 根据结构相似方法和刚度相等的原则, 提出了基于设计元素的复合材料结构设计方法, 建立了结构缩比和复合材料结构设计软件, 并分别设计了复合材料机翼盒段和机翼模型。采用低模量复合材料制造, 进行了模态实验和风洞实验。实验结果与理论值吻合较好。设计的梁架2蒙皮复合材料机翼模型实现了结构和动力学相似, 相对于传统的蒙皮不传递载荷的梁架-维形颤振模型有了质的飞跃。Abstract: On the basis of st ructural similarity and equal stiffness , a scaling-down wing-box and a wing model forflutter test s were designed based on the original metal models. A design method based on design element s for composite st ructures was proposed and a sof tware was developed for scaling-down st ructures and composite st ructuredesign. The models were manufactured with low modulus composite materials and the modal analysis and test s weremade. The result s of analysis are in good agreement with those of the test s. The design method is very practical inengineering and the model with frame-skin st ructure , which realizes the st ructural and dynamic similarities , is muchbetter than the t raditional one , which is of beam2holding appearance st ructure.
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Key words:
- composites /
- wing /
- modal analysis /
- manufacture /
- modal test s /
- flutter
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