Dynamic state of a helicopter's structure at non-stationary movement of the landing spot

Аuthors

Sidorenko A. S.

e-mail: k906@mai.ru

Abstract

The procedure and outcomes of development of a numerical model and data of computational researches of a dynamic state oj a helicopter’s load-carrying structure and aggregate at its placing on a mobile landing spot are presented. Action of transient поп -stationary kinematic disturbance on a helicopter’s structure connected to a mobile platform by one-sided elastic links (mooring elements) is considered. The kinematic disturbance, arising at an emergency condition, is transferred to a structure through landing gear and mooring elements. The problem about non-stationary movement is solved with use of a finite elements method on which basis models of a load-carrying structure and nonlinear-elastic mechanisms of landing gear are solved. Time dependences of displacements, speeds and accelerations in various points of the helicopter’s structure are obtained.

Keywords:

helicopter; impact; load-carrying structure; emergency situation; oscillations; damping; a method of a finite element; dynamic state, acceleration