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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2023, Vol. 44 ›› Issue (10): 27554-027554.doi: 10.7527/S1000-6893.2022.27554

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Key structural dynamic design technologies in liquid rocket engines: Review

Dahua DU1(), Bin LI2   

  1. 1.Science and Technology on Liquid Rocket Engines Laboratory,Xi’an 710100,China
    2.Academy of Aerospace Propulsion Technology,Xi’an 710100,China
  • Received:2022-05-31 Revised:2022-06-20 Accepted:2022-09-15 Online:2023-05-25 Published:2022-09-30
  • Contact: Dahua DU E-mail:cascddh@sina.com.cn
  • Supported by:
    National Key Basic Research and Development Program(613321);Equipment Pre-research Common Technology Project(41410040202)

Abstract:

With the development of liquid rocket engine technologies, structural dynamic problems become one of the key factors affecting the life and reliability of engines. In the past decades, the design concepts and methods of the engine gradually developed from the initial static strength and safety life design to the combination of dynamic and static strength, and economic life design, which were widely used in engines, significantly improving the working reliability of the engine structures. However, the increasing size and complex structure and the extreme harshness of the working environment for the new rocket engines require urgent solution to the technical problems of engine structural dynamic design to meet the needs of high performance, high reliability, light weight and reusability. This paper reviews the key technologies such as load prediction, dynamic modeling and model updating, dynamic strength assessment and life prediction, and anti-fatigue design on account of dynamics optimization, based on the analysis of typical dynamic problems in engine structures. The research summary and prospect are also presented. This review will provide guidance for the development of structural dynamic design technology of liquid rocket engines.

Key words: dynamics, dynamic strength, fatigue, life, liquid rocket engine

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