For the strongly unsteady characteristic of the flow field of flapping-wing, the traditional vortex lattice method is not more effective. A surface source distribution is used to replace the boss and the vortex lattice representation of propeller blader is also incorporated. 对扑翼的非定常流场,传统的定常涡格法已不再适用。桨毂的影响以布置在其表面上的面源分布来模拟,螺旋桨叶采用离散的涡格法来处理。