超小型固定翼飞行器的有限元模态分析及结构动力的调整

The Finite Element Modal Analysis and Structural Dynamic Adjustment of a Fixed Wing Super - Mini Aerial Vehicle

采用ANSYS软件对超小型固定翼飞行器(SMAV)整体结构进行了有限元模态分析和研究,并给出了超小型固定翼飞行器的5阶同有频率和振型(除零频率外)。结果表明,3、4阶模态频率对超小型固定翼飞行器的机翼纵向变形影响很大,而5阶模态频率对超小型固定翼飞行器的扭曲变形影响较大。本文进行了刚度、质量的局部调整,使得超小型固定翼飞行器的振动幅度有较大的下降。

In this paper, the modal analsysis of a fixed Super - Mini Aerial Vehicle(SMAV) has been done by means of using the software - ANSYS, which is produced by American ANSYS company. And then 5 extended ranks of the SMAV modal state are given. The results show that some modal frequencies have great influence on the wings of the SMAV. In order to reduce the vibration on the SMAV, the local adjustment to stiffness and barycenter of the SMAV is made. The results show that vibration on SMAV be reduced considerably.