TY - GEN
T1 - Analysis of Vibration Characteristics and Structural Improvement of Rolling Ball Joint Swinging Nozzle
AU - Qi, Haitao
AU - Liu, Xu
AU - Zhao, Dongao
AU - Liu, Duo
AU - Meng, Haoyang
AU - Su, Hang
N1 - Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2023
Y1 - 2023
N2 - The solid rocket motor drives the tail nozzle to swing through the servo mechanism, thereby achieving thrust vector control. In order to reduce the impact of vibration on the system structure and control accuracy during engine nozzle oscillation, this study analyzes the vibration characteristics and improves the structure of a certain type of rolling ball joint swinging nozzle. The finite element method was used to conduct modal analysis of the system under prestressed state, and the first six natural frequencies and vibration modes were obtained. Then, the frequency response curve of the structure was obtained through harmonic response analysis and the influencing factors of vibration were analyzed to explore the sustained dynamic characteristics of the engine under servo excitation. On the premise of avoiding excessive mass increase, the thickness of the nozzle wall and joint connection was appropriately increased, the axial size of the nozzle was reduced, and the nozzle profile was optimized. The results show that the first and second order natural frequencies of the improved structure are increased by 10.9 %, and the amplitude attenuation is 32.9 %, effectively improving the stiffness of the system. This study provides theoretical guidance and engineering data support for the structural design and performance analysis of solid rocket motors.
AB - The solid rocket motor drives the tail nozzle to swing through the servo mechanism, thereby achieving thrust vector control. In order to reduce the impact of vibration on the system structure and control accuracy during engine nozzle oscillation, this study analyzes the vibration characteristics and improves the structure of a certain type of rolling ball joint swinging nozzle. The finite element method was used to conduct modal analysis of the system under prestressed state, and the first six natural frequencies and vibration modes were obtained. Then, the frequency response curve of the structure was obtained through harmonic response analysis and the influencing factors of vibration were analyzed to explore the sustained dynamic characteristics of the engine under servo excitation. On the premise of avoiding excessive mass increase, the thickness of the nozzle wall and joint connection was appropriately increased, the axial size of the nozzle was reduced, and the nozzle profile was optimized. The results show that the first and second order natural frequencies of the improved structure are increased by 10.9 %, and the amplitude attenuation is 32.9 %, effectively improving the stiffness of the system. This study provides theoretical guidance and engineering data support for the structural design and performance analysis of solid rocket motors.
KW - Harmonic analysis
KW - Modal analysis
KW - Rolling ball joint swinging nozzle
KW - Structural improvement
UR - https://www.scopus.com/pages/publications/85174547520
U2 - 10.1007/978-981-99-6847-3_56
DO - 10.1007/978-981-99-6847-3_56
M3 - 会议稿件
AN - SCOPUS:85174547520
SN - 9789819968466
T3 - Lecture Notes in Electrical Engineering
SP - 647
EP - 656
BT - Proceedings of 2023 Chinese Intelligent Systems Conference - Volume I
A2 - Jia, Yingmin
A2 - Zhang, Weicun
A2 - Fu, Yongling
A2 - Wang, Jiqiang
PB - Springer Science and Business Media Deutschland GmbH
T2 - 19th Chinese Intelligent Systems Conference, CISC 2023
Y2 - 14 October 2023 through 15 October 2023
ER -