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MECSOL 2022
8th International Symposium on Solid Mechanics
Influence of Sloshing on Dynamic Behavior of Launch Vehicle Submitted to Transient Loads
Submission Author:
Domingos Sávio Aguiar , SP
Co-Authors:
Domingos Sávio Aguiar, Carlos Souto, Mauricio Silva
Presenter: Domingos Sávio Aguiar
doi://10.26678/ABCM.MECSOL2022.MSL22-0037
Abstract
Liquid propelled rocket engines are used in most launcher vehicles since it offers many advantages over its solid counterparts: higher specific impulse; the possibility of re ignition and the control of thrust vector magnitude. During its whole mission a launch vehicle is submitted to different dynamic loads, which can affect the liquid mass in the propellant tanks. A liquid mass with a free surface in a reservoir subjected to displacements may suffer the phenomenon of "sloshing", which consists of oscillations of the liquid free surface. Also, when certain kinds of sloshing modes are excited, the liquid volume center of mass position can be shifted. Since the liquid propellants mass in a launcher can be significant in relation to the whole vehicle mass, oscillations in the fluid volumes can lead to important dynamic effects. In this work, the dynamic behavior of a launch vehicle is analyzed when submitted to lateral transient loads. The influence of liquid propellant in the vehicle dynamics is taken into account by considering lateral sloshing effects. The launch vehicle body is modelled as a beam and the liquid is modelled by a spring-mass system.
Keywords
Launch vehicle, Sloshing, Dynamic Behavior, Transient load
