|Table of Contents|

Fault diagnosis of local resonance based on rotordynamic analysis(PDF)

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

Issue:
2017年03期
Page:
6-9
Research Field:
研究与设计
Publishing date:

Info

Title:
Fault diagnosis of local resonance based on rotordynamic analysis
Author(s):
JIN Lu; ZHU Donghua; WANG Wei; HUANG Jinping; XUAN Tong
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
rotordynamic characteristic parameter;  local resonance;  modal test;  fault diagnosis
PACS:
TH113.1-34
DOI:
-
Abstract:
Local resonance rotordynamic model was developed. The method of forecasting local resonance frequency was carried out using the vibration data picked from the rotor. Rotordynamic experiment was taken with the rotor which consists of two disks and two bearings supported by flexible pedestals. The outward force of one pedestal was out of range, while the vibration of the disks was small with uptrend. The phenomena accords with local resonance. The method of forecasting local resonance frequency was used to analyze the vibration data, as the result, the theoretical frequency was found. Modal test was carried out, and similar frequency to theoretical one was got, which also prove the fault diagnosis of local resonance. The pedestals was redesigned based on the mode shape, which removes the local resonance out of the working range.

References:

[1]廖明夫, 蒲秋洪, 钟志才. 转子特性参数的预估和临界响应的预报[J]. 航空动力学报, 2003, 18(3): 367-372.
[2]于潇, 廖明夫. 转子特性参数估计和试验研究[J]. 机械科学与技术, 2004, 23(1): 101-104.
[3]金路, 廖明夫, 宋明波. 转子在临界转速点的振动和阻尼比的估计方法[J]. 振动、测试与诊断, 2012, 32(3): 502- 504.
[4]廖明夫. 航空发动机转子动力学[M]. 西安: 西北工业大学出版社, 2015, 19-23.
[5]张洪飚, 李志广. 航空发动机设计手册 转子动力学及整机振动[M]. 北京: 航空工业出版社, 2000, 371-372.
[6]毛乐园, 尹健昭. 立式超速试验台轴系动力特性分析[J].火箭推进, 2016, 42(1): 88-94.
MAO Leyuan, YIN Jianzhao. Analysis on dynamic characteristics of shaft system of vertical overspeed tester[J]. Journal of rocket propulsion,2016, 42(1):88-94.
[7]窦唯, 刘占生. 液体火箭发动机涡轮泵转子弯扭耦合振动研究[J]. 火箭推进, 2012, 38(4): 17-25.
DOU Wei, LIU Zhansheng. Research on bend-twist coupling vibration of liquid rocket engine turbopump rotors [J]. Journal of rocket propulsion, 2012, 38(4): 17-25.

Memo

Memo:
-
Last Update: 1900-01-01