|Table of Contents|

Failure analysis and structure improvement of pipeline fracture for ramjet engine(PDF)

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

Issue:
2021年01期
Page:
43-48
Research Field:
研究与设计
Publishing date:

Info

Title:
Failure analysis and structure improvement of pipeline fracture for ramjet engine
Author(s):
SHI Bo;  DAI Jin;  FAN Genmin
(Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
ramjet engine;  pipeline fracture;  modal shape;  random vibration fatigue
PACS:
V343.23
DOI:
-
Abstract:
The fracture failure occurring in a pipeline vibration experiment is analyzed in this paper. Through the structure modal analysis combining simulation and experiment, the immanent relationship between modal shape and random vibration destruction is deduced, and the causes of pipeline failure are preliminarily located and qualitatively analyzed. Based on ANSYS nCode DesignLife software, the random vibration fatigue calculation of pipeline is carried out, and the calculation process and design method of random vibration fatigue are summarized. The fracture position predicted by the simulation is basically consistent with the experimental results. Vibration fatigue simulation is used to quantitatively predict the fatigue life of several improved structures to obtain the best scheme. The optimization scheme improves the anti-vibration performance of the pipeline structure and reduces RMS stress value and damage. The fatigue damage life of the optimization scheme is increased to 3.2×107 seconds under the main failure condition(x-direction vibration), and 202%(y-direction vibration)and 190%(z-direction vibration)in other directions, respectively. The effectiveness of the improvement measures is verified by the test.

References:

[1] 刘庆楣,符辛业.飞航导弹结构设计[M].北京:宇航出版社,1995.
[2] 王帅,张明明,刘桢,等.预载荷作用下管路结构动强度评估方法[J].北京航空航天大学学报,2016,42(4):745-750.
[3] 杜大华,穆朋刚,田川,等.液体火箭发动机管路断裂失效分析及动力优化[J].火箭推进,2018,44(3):16-22.
DU D H,MU P G,TIAN C,et al.Failure analysis and dynamics optimization of pipeline for liquid rocket engine[J].Journal of Rocket Propulsion,2018,44(3):16-22.
[4] 任朴林,张帅,于阳.某型排气组件振动强度分析及优化[J].机械工程与自动化,2019(6):108-110.
[5] 卢金丽,黄超广.飞机液压燃油管路系统振动故障模式、机理及排除方法[J].振动工程学报,2008,21(S):78-82.
[6] 薛立鹏,李文斌,司群英,等.运载火箭结构振动疲劳损伤的工程分析方法[J].导弹与航天运载技术,2019(2):35-38.
[7] 方红荣,薛立鹏,李朝晖.基于有限元法的运载火箭管路随机振动疲劳寿命分析[J].导弹与航天运载技术,2017(4):107-110.
[8] 崔约贤,王长利.金属断口分析[M].哈尔滨: 哈尔滨工业大学出版社,1998.
[9] 甘幼琛,谢世浩.随机振动的基本理论与应用[M].长沙:湖南科学技术出版社,1981.
[10] 罗建召,唐伟.机载雷达结构随机振动疲劳破坏技术研究[J].电子机械工程,2013,29(6):23-26.
[11] 张钊,张万玉,胡亚琪.飞机结构振动疲劳分析研究进展[J].航空计算技术,2012,42(2):60-64.
[12] 姚起杭,姚军.工程结构的振动疲劳研究[J].飞机工程,2005(3):5-8.
[13] 王明珠.结构振动疲劳寿命分析方法研究[D].南京: 南京航空航天大学,2009.
[14] 孟凡涛,胡愉愉.基于频域法的随机振动载荷下飞机结构疲劳分析[J].南京航空航天大学学报,2012,44(1):32-36.
[15] 付稣昇.ANSYS nCode DesignLife疲劳分析基础与实例教程[M].北京: 人民邮电出版社,2020.
[16] 薛杰,穆小强,杨全洁,等.某气瓶结构振动断裂故障分析及改进措施[J].火箭推进,2013,39(6):42-47.
XUE J,MU X Q,YANG Q J,et al.Analysis of vibration fracture failure of a gas vessel and improvement measures[J].Journal of Rocket Propulsion,2013,39(6):42-47.
[17] 贾建援,黄一红,康春霞.一种工程结构模态阻尼特征预估方法[J].西安电子科技大学学报,1995,22(3):295-300.
[18] DIRLIK T.Application of computers in fatigue analysis[D].Coventry:University of Warwick,1985.
[19] 孟彩茹,卢博友.基于PSD的随机载荷下振动疲劳寿命估算[J].机械设计,2009,26(5):73-75.
[20] 薛杰,王伟,杜大华,等.姿控动力系统连接螺钉振动疲劳仿真分析研究[J].火箭推进,2019,45(4):38-44.
XUE J,WANG W,DU D H,et al.Simulation analysis for vibration fatigue of the screw in divert and attitude control system[J].Journal of Rocket Propulsion,2019,45(4):38-44.

Memo

Memo:
-
Last Update: 2021-02-20