某型无人机挂伞座的结构改进和分析

Structure Improvement and Analysis of Hanging Parachute Base of Certain UAV

基于结构有限元法,针对某型无人机挂伞座进行了结构改进和分析。通过挂伞座底座安装螺栓孔布局的调整和座底厚度的增加,使挂伞座和安装螺栓的受力得到较好地改善,但是只有部分安装螺栓得到充分利用和发挥;通过载荷传递路径的改进,不仅使挂伞座和安装螺栓的受力得到较好的改善,而且使所有安装螺栓得到充分利用和发挥。计算结果说明,结构改进后,在结构质量基本不变的情况下,挂伞座最大应力值减小76.9%;安装螺栓应力值减小了52.7%,受力改善显著。

Based on FEA of structure, structure improvement and analysis on the hanging parachute base of certain UAV are carried out in the paper. By changing the hole layout of the bolt and increasing the thickness for the hanging parachute base, the stress on the hanging parachute base and the bolt is improved greatly, but only part of the bolts find full use, and by transferring path of load for the hanging parachute base, the entire bolts find effective use. The result shows that after structure improvement and with no change of its structure weight, the maximum stress of the hanging parachute base is reduced by 76.9%, and the stress of the bolt is reduced by 52.7%. Those indicate the obvious static improvement of the hanging parachute base.