Influence of First Stage Mass Variation on Satellite-Launch Vehicle Longitudinal Vibrations
Palavras-chave:
vibrations, launch vehicle, dynamic loads, mass variation, thrust oscillationResumo
During the launch phase, satellites are subjected to intense dynamic loads. Part of these loads is due to
acoustic excitation from the exhaust jet stream and other aerodynamic effects and part is due to different
phenomena that originate in the launch vehicle propulsive system. The later can cause vibrations that propagate
longitudinally along the rocket structure and can reach the satellite. This paper analyzes the influence of the effect
of mass variation of the first stage of a launch vehicle in the longitudinal dynamic response of its payload during
lift-off and the first phase of the flight. A discrete multi degree of freedom model was implemented to evaluate the
longitudinal vibrations of a real launcher-satellite set when subjected to thrust oscillations.
