Dynamic Response of the Rocket Body under Seismic Excitation

Abstract

In order to study the influence of seismic excitation on the rocket body during the propellant injection and launch waiting state of a certain rocket, the dynamic response analysis of the rocket structure was carried out, and the seismic response spectrum analysis and time-history analysis were respectively used to solve the structural dynamic response.SolidWorks was used to establish a simplified three-dimensional model of the rocket body, and ANSYS Workbench was imported to solve the static stress, modal frequency and mode of the rocket. Time-history analysis of El-centro seismic wave data was carried out, and Fourier transform was applied to frequency domain spectrum for seismic response spectrum analysis. Cloud maps of structural equivalent stress, displacement and strain were obtained. After numerical verification, the results show that the rocket meets the safety requirements of seismic resistance, and more research methods are verified for the optimization of the rocket body.