民机不同商载配置对机身着陆载荷的影响分析

Impact Analysis of Different Payload Distribution on Fuselage Landing Loads for Civil Aircraft

重量分布和重心位置是影响起落架和机体地面载荷的重要因素,在无穷多种商载分布及装载方案中,挑选出机身载荷的严重情况具有重要的意义。选取部分典型商载配置情况,以刚性机体机身着陆载荷为算例,分析不同商载配置下的机身垂直剪力和垂直弯矩,并针对不同商载重量和分布分别进行对比分析。结果表明:商载重量的大小对机身载荷起了决定性作用;对于最大商载下的几种不同重量分布情况,机身垂直剪力和垂直弯矩量级相当。

Mass distribution and center position of gravity of aircraft is one of the important factors on landing gear and airframe ground loads.Finding out the critical load cases of fuselage loads among various payload distribution and loading schemes is of important significance.Several typical payload distributions are selected.Using the rigid body fuselage landing loads as an example,vertical shear and vertical bending moments of fuselage are analyzed.Load comparisons are made for different payload and different mass distribution separately.The results show that the payload mass is of a significant influence on fuselage loads;For different distribution of maximum payload,the vertical shear and vertical bending moments of fuselage are equivalent.