Study on the Reliability Analysis Method for Vibration Fatigue of Pipeline Structures Under the Random Influence of Materials and Loads

被引：1
|
作者：
Gao Y. [1 ]
Yang M. [1 ]
Li B. [2 ]
Du D. [1 ]
Wang J. [1 ]
Li B. [2 ]
Zhou J. [3 ]
机构：
[1] National Key Laboratory of Science and Technology on Liquid Rocket Engine, Xi'an Aerospace Propulsion Institute, Xi'an
[2] Academy of Aerospace Propulsion Technology, Xi'an
[3] School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an
来源：
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University | 2023年 / 57卷 / 11期
关键词：
liquid rocket engine; pipeline; randomness; reliability; vibration fatigue life;
D O I：
10.7652/xjtuxb202311001
中图分类号：
学科分类号：
摘要：
This paper aims to address the problem of high reliability life assessment of pipeline structures in vibration environments. To this end, stochastic models arc established for underlying factors such as materials and loads. A reliability analysis model for the vibration fatigue life of pipeline structure is obtained by considering the transmission and amalgamation of the randomness associated with these factors. The applicability of the stochastic models and the efficiency of the life model arc confirmed by typical material test results and a singlc-dcgrcc-of-freedom time-domain system. In order to support the development of reusable technology for liquid rocket engines, a typical pipeline of a liquid rocket engine is taken as the research object to evaluate its high reliability life. The analysis results show that, under the test run load, the vibration fatigue life of the pipeline structure presents a lognormal distribution and a large dispersion in the life data is found. Among all the considerations, material fatigue properties show a greater influence on the life scatter. For the pipeline structure, on the basis of deterministic life, a life reduction factor of at least 5 is needed to cover the random influence of loads and materials and obtain its high reliability vibration fatigue life. This research provides important technical support for developing reusable technology for liquid rocket engines. © 2023 Xi'an Jiaotong University. All rights reserved.
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页码：1 / 11
页数：10
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