Abstract
This paper adopts the time course method of ANSYS software to analyze the dynamic response of liquid rocket under the action of TAFT seismic wave, and calculates the displacement and stress before and after the injection of liquid rocket. The results show that under the action of TAFT seismic wave, the liquid rocket swings along the direction of seismic wave action before and after filling. With the increase of the height, the maximum displacement appears in the top of the rocket, and the maximum stress appears in the tail support part. The maximum swing amplitude and the maximum stress are greatly increased than before the filling, especially the swing is divergent, there is a possibility of rocket dumping and structural strength damage.
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