Problem-solving of helicopter dynamics by finite elements method using software package MSC.Nastran.
Aviation technics and technology
AbstractCurrently the stage of dynamic and life test is the most time-consuming and expensive in the process of creation and modernization of helicopters.Preliminary calculations based on the available techniques is not always possible to obtain exact results and avoid the high cost of model shops. In this work a promising approach to the problems of the overall dynamic strength of the helicopter, based on the wider application of the finite element method is demonstrated by the problem of helicopter airframe`s dynamic loading by recoil from automatic cannon with a single shot.
Keywords:dynamics; helicopter; shot; finite elements method; normal modes; damping; gain-frequency characteristic