# ANALYSIS OF THRUST EFFECTS ON DIRECTIONAL STABILITY OF A SIMPLIFIED 2-DOF MODEL OF AN ELASTIC ROCKET STRUCTURE

## Palavras-chave:

Vibration, Rocket Thrust, Rocket Stability## Resumo

A simplified model of a rocket structure by means of a 2-DOF, lumped parameter Beck

column analogue was studied through stability analysis by Lyapunov’s first method linearization of the

equations of motion around equilibrium under different thrust intensities and spring constants. The

equations of motion were generated from the analytical differentiation of the Lagrange’s equations

with dissipative effects lumped into a Rayleigh function and external forces represented by the action

of a single follower force, which is tangent to the nozzle.