|Table of Contents|

Failure analysis on stem of valve AA9-683(PDF)

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

Issue:
2015年06期
Page:
99-104
Research Field:
测控与试验
Publishing date:

Info

Title:
Failure analysis on stem of valve AA9-683
Author(s):
DONG Dong;  LIU Hongwei;  ZHANG Junfeng;  LI Qian;  ZHU Chengliang
Xi’an Aerospace Propulsion Test Technique Institute, Xi’an 710100, China
Keywords:
valve stembucklingcritical loaddeflection
PACS:
V434-34
DOI:
-
Abstract:
The stem of valve AA9-683 bending and clamping phenomenon occurred repeatedly in the test. According to the valve working principle and fault stem decomposition, and the failure mechanism analysiss of the valve stem, it is considered that the stem flexural torsional buckling may be generated by the combined action of critical load and lateral load. The minimum cross section uniform method and simulation calculation method are chosen to calculate the critical loads of valve stem respectively. The former obtains the critical load according to Euler critical load formula, and the latter obtains the critical load according to the static method based buckling calculation method of ANSYS Workbench software. By comparing the critical load data got by the two methods, the results are close to each other. According to the measured deflection and the deflection calculating method, the lateral load can be deduced. The relation of the critical load and lateral load with the actual results of the valve stem failure are compared and analyzed. The results indicate that analysis conclusion of the valve stem failure mechanism is tenable. In

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Last Update: 1900-01-01