复合材料盒段颤振特性试验研究

 本文介绍了一个复合材料盒段的颤振特性试验研究,包括地面共振试验。风洞颤振试验和计算分析。试验盒段为骨架-蒙皮式结构。一个试验盒段蒙皮为复合材料,另一个试验盒段蒙皮为铝合金。两种试验盒段骨架相同,均为铝合金梁架;两种试验盒段蒙皮厚度亦相同。试验和计算表明,复合材料盒段比铝合金合段颤振速度提高16.7％,盒段总质量减少17.7％。

EXPERIMETAL INVESTIGATION ON FLUTTER CHARACTERISTICS OF COMPOSITE TORSION-BOX

The experimental investigation on flutter characteristics of composite torsion-box is presented in this paper. Vibration test, wind tunnel flutter test and the corresponding calculation are conducted. The torsion-box is composed of frame and skin. Two models of the same frame are tested, one of them covered with composite skin, the other with aluminium alloy skin of the same thickness. The composite skin is a balanced, symmetric laminate of the material T300/648, and its thickness is 0.5mm with the ply stacking + 4510/- 4520/ + 4510].The frame is made of aluminium alloy with the identical beam height of 3mm. Experimental and calculated date indicate that for the model with composite skin, the flutter speed is 16.7% higher than that with aluminium alloy skin, and the weight of the torsion-box is 17.7% lower.