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Journal of Projectiles, Rockets, Missiles and Guidance >

2023 , Vol. 43 >Issue 1: 104 - 110

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2023.01.015

Modal Test and Analysis of Solid Rocket Motor

  • ZHANG Yongliang 1 ,
  • JIA Liang 1 ,
  • DI Wenbin 2 ,
  • REN Donghui 1 ,
  • HAN Ming 1
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  • 1 Beijing Institute of Structure and Environment Engineering, Beijing 100076, China
  • 2 Shanghai Institute of Astronautical Systems Engineering,Shanghai 201109,China

Received date: 2022-02-26

  Online published: 2025-02-01

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Abstract

The experimental modal analysis of a large segmented solid rocket motor was carried out. The intuitive “unbalanced” torsional vibration mode appeared in the test was analyzed. Through data analysis combined with the observable assembly of the test model and the structural form of the solid motor. It was considered that the main factor is the elastic property of the propellant. Due to the solid rocket motor is usually sealed and pressurized, which is used to protect the propellant, it is impossible to verify the test point of propellant sticking. Therefore, the comparative simulation model of solid motor was established. The simulation model was modified based on the experimental data. The harmonic response was analyzed according to the excitation scheme of modal test. The analysis results verified the intuitive “unbalanced”torsional vibration mode, and proved that the elastic characteristics of grain is the cause of the above phenomenon. Therefore, with the increase of SRM size, the propellant of SRM will increase greatly. The elastic properties of solid propellants with low stiffness and viscoelastic properties can not be ignored. At the same time, the measurement and excitation requirements of grain for experimental modal analysis of large solid rocket motor are also proposed.

Key words： solid rocket motor; large segmented; test modal analysis; propellant

Cite this article

ZHANG Yongliang , JIA Liang , DI Wenbin , REN Donghui , HAN Ming . Modal Test and Analysis of Solid Rocket Motor[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2023 , 43(1) : 104 -110 . DOI: 10.15892/j.cnki.djzdxb.2023.01.015

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