Dynamic state of a helicopter’s structure at impact with an obstruction
Aviation technics and technology
Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia
AbstractThe procedure and outcomes of development of a numerical model and data of computational researches of a dynamic state of a load-carrying structure of the helicopter are submitted at its abnormal collision with different obstructions at stages of take-off and landing approach. Impact of a helicopter’s structure with an obstruction reconstituting properties of the building or a ship deckhouse under the given requirements of the approach is considered. The problem about non-stationary interaction is solved with use of a finite element method on the basis of which models of a load-carrying structure and an obstruction are developed. Time dependences of displacements, velocities and accelerations in different points of a structure of the helicopter are obtained.
Keywords:impact; load-carrying structure; oscillations; damping; an elasto-plastic material; a method of a finite element; one-way communication; an emergency situation, dynamic state, vibration acceleration