Overall Structure Modeling and Modal Analysis of Liquid Rocket Engine Based on ABAQUS Secondary Development Platform

With the development of computer technology, dynamic simulation technology becomes more and more important in the engine design and development cycle. The development and use of relevant special programs greatly shorten the engine development cycle. In this paper, the components and connection modes of liquid rocket engine are simplified reasonably and efficiently, and a high-precision equivalent model with the maximum deviation of 9.754% and the minimum deviation of 0.423% of the natural frequency obtained by modal analysis is established; The ABAQUS secondary development technology is used to build a modal analysis platform, so as to quickly and accurately realize modal calculation, which is of guiding significance to the designers of liquid rocket engines.