大气紊流对民用飞机的使用有较大影响,引起飞机乘坐品质恶化、操纵性差和结构疲劳等问题.分析和研究大气紊流及其相关课题对民机的研发具有重要意义.简述连续紊流速度场的数值模拟方法,给出飞机连续紊流响应仿真计算流程以及连续紊流载荷任务分析准则流程.以某型飞机为例,计算了连续紊流作用下升力的时间历程.以飞机重心处法向过载为研究对象,根据任务分析准则估计了连续紊流作用下飞机的使用过载.结果表明各个任务段内的使用过载随马赫数的增加而增加；随飞行高度的升高而降低.设定任务剖面内的使用过载估算值与设计要求值基本相符.%Theatmospheric turbulence has adverse effects on the embarkation quality, controllability and structural fatigue of a civil aircraft. To our knowledge, there are few papers in the open literature dealing with the theme mentioned in the title. Therefore, we propose a method for simulating the atmospheric turbulence field of an elastic aircraft. Its core consists of: (1) we couple the calculation of atmospheric turbulence, aerodynamic elasticity and flight dynamics as shown by the block diagram in Fig. 3 and establish the mathematical model of the flight state and trajectory of the elastic aircraft under continuous turbulence; (2) we give the mission analysis criteria of continuous turbulence load as shown in Fig. S. Finally, taking a certain elastic aircraft as an example, we simulate the variation of its lift coefficient with time and use the mission analysis criteria to estimate the normal overload at its gravity center. The simulation results, given in Figs. 2, 4 and 7 and Table 4, show preliminarily that: (1) the normal o-verload of the elastic aircraft during its various missions increases with increasing Mach number but decreases with increasing flight altitude; (2) The estimated value of the normal overload of a given mission profile is in agreement with that required by an engineering design.
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