Method for judging flutter of space-ground reciprocating aircraft based on acting principle

The invention discloses a method for judging flutter of a sky-earth round-trip aircraft based on a working principle, which comprises the following steps of: defining virtual aerodynamic force working as a product of generalized aerodynamic force and generalized displacement, calculating the virtual aerodynamic force working in real time in sub-iteration, and judging the working condition of the aerodynamic force on a structure through a damping characteristic developed by time domain data, so as to judge the flutter of the space-earth round-trip aircraft. And judging whether the flutter of the aircraft is divergent or not. According to the method, the relative generalized displacement of virtual aerodynamic force acting is taken as a prior index, the aeroelastic divergence phenomenon can be found as soon as possible, the time cost required by numerical simulation is effectively reduced, and the method has high engineering application value. 本发明公开了一种基于做功原理的天地往返飞行器颤振判断方法，定义虚拟气动力做功为广义气动力与广义位移的乘积，通过在亚迭代中实时计算虚拟气动