材料与载荷随机性影响下管路结构振动疲劳可靠性分析方法

高玉闪; 杨茂; 李斌; 杜大华; 王珺; 李斌潮; 周建

doi:10.7652/xjtuxb202311001

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材料与载荷随机性影响下管路结构振动疲劳可靠性分析方法

专题液体火箭发动机 | 更新时间：2025-12-08

- 材料与载荷随机性影响下管路结构振动疲劳可靠性分析方法
- Study on the Reliability Analysis Method for Vibration Fatigue of Pipeline Structures Under the Random Influence of Materials and Loads
- 西安交通大学学报 2023年57卷第11期页码：1-11
- 作者机构：
  
  1. 西安航天动力研究所液体火箭发动机技术重点实验室,西安,710100
  2. 航天推进技术研究院,西安,710100
  3. 西安交通大学航天航空学院,西安,710049
- 作者简介：
  
  : 2023-04-18。作者简介: 高玉闪(1983—),男,博士,研究员
  李斌(通信作者),男,博士,研究员。基金项目: 国家自然科学基金资助项目(11702204)。
- 基金信息：
  
  : 2023-04-18。作者简介: 高玉闪(1983—),男,博士,研究员;李斌(通信作者),男,博士,研究员。基金项目: 国家自然科学基金资助项目(11702204)。
- DOI：10.7652/xjtuxb202311001
  中图分类号： V434.34
- 网络首发：2023-11-10，
  
  纸质出版：2023
- 稿件说明：
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高玉闪, 杨茂, 李斌, 等. 材料与载荷随机性影响下管路结构振动疲劳可靠性分析方法[J]. 西安交通大学学报, 2023,57(11):1-11.

GAO Yushan, YANG Mao, LI Bin, et al. Study on the Reliability Analysis Method for Vibration Fatigue of Pipeline Structures Under the Random Influence of Materials and Loads[J]. 2023, 57(11): 1-11.
高玉闪, 杨茂, 李斌, 等. 材料与载荷随机性影响下管路结构振动疲劳可靠性分析方法[J]. 西安交通大学学报, 2023,57(11):1-11. DOI： 10.7652/xjtuxb202311001.

GAO Yushan, YANG Mao, LI Bin, et al. Study on the Reliability Analysis Method for Vibration Fatigue of Pipeline Structures Under the Random Influence of Materials and Loads[J]. 2023, 57(11): 1-11. DOI： 10.7652/xjtuxb202311001.

摘要

为应对振动环境下管路结构高可靠性寿命评估问题

建立材料、载荷等底层因素随机性模型

并考虑随机性传递、综合作用

获得管路结构振动疲劳寿命可靠性分析模型。以典型材料试验结果及单自由度时域系统

证明了随机性模型的适用性及寿命模型的高效性。以液体火箭发动机典型管路结构为分析对象

评估其高可靠性寿命。分析结果表明:在试车振动载荷作用下

管路结构振动疲劳寿命符合对数正态分布

且寿命存在较大的分散性; 所考虑的随机因素中

材料疲劳性能对寿命分散性的影响较大; 对管路结构

在确定性寿命的基础上

应考虑至少不小于5倍的寿命缩减系数

以覆盖载荷及材料的随机性影响而获得其高可靠度振动疲劳寿命。该研究为液体火箭发动机可重复使用技术发展提供重要技术支撑。

Abstract

This paper aims to address the problem of high reliability life assessment of pipeline structures in vibration environments. To this end

stochastic models are 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 are confirmed by typical material test results and a single-degree-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.

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