|Table of Contents|

Failure analysis and dynamics optimization of pipeline for liquid rocket engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2018年03期
Page:
16-22
Research Field:
研究与设计
Publishing date:

Info

Title:
Failure analysis and dynamics optimization of pipeline for liquid rocket engine
Author(s):
DU Dahua1;  2;  MU Penggang2;  TIAN Chuan3;  ZHOU Jian2;  CHENG Xiaohui2
1. College of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China; 2. Science and Technology on Liquid Rocket Engine Laboratory, Xi'an 710100, China; 3. Military Representative Bureau of Air Force Ordnance Equipment, Xi'an 710072, China
Keywords:
pipeline failure;  optimization design;  liquid rocket engine;  failure analysis
PACS:
V434.2-34
DOI:
-
Abstract:
The safety and reliability of pipeline system for liquid rocket engine are the key issues to safe operation of engine. Aiming at the fracture failure of rocket engine pipeline, a newfailure analysis method and dynamic optimization design of the pipeline are proposed. Firstly, the vibration control measures were put forward based on the mechanism analysis and fault recurrence. Then the front and rear chamfers of the failure pipe joint were treated as design variables, while the minimum dynamic stress at the two chamfers was served as the objective function. The dynamics optimization model design and dynamic strength optimization design based on shape optimization were conducted by using the structure frequency restricted zone as a constraint. Lastly, the damage quantitative analysis of random vibration fatigue of the structure under base-excitation was carried out for the joint structure. In addition, the improved approach was validated by fatigue test. It is concluded from the research that the dynamics optimization of pipeline structure can improve the mechanical environment adaptability and structuralrelia bility, and the effectiveness of improvement measures is verified. The established methods of structural failure analysis and dynamics optimization design provide technical support for the project development.

References:

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Last Update: 2018-06-30