|Table of Contents|

Research on structural dynamic characteristics of the 500-ton LOX/kerosene rocket engine(PDF)

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

Issue:
2020年02期
Page:
44-49
Research Field:
研究与设计
Publishing date:

Info

Title:
Research on structural dynamic characteristics of the 500-ton LOX/kerosene rocket engine
Author(s):
ZHANG Xiangmeng;  CHEN Hui;  GAO Yushan;  QIN Hongqiang
(Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
Keywords:
500-ton;  LOX/kerosene rocket engine;  modal analysis;  servo loop structure
PACS:
V434.2
DOI:
-
Abstract:
To obtain the structural dynamic characteristics of the 500-ton LOX/kerosene rocket engine which is planed for the manned lunar project, the finite element method was used for modal analysis of the whole structure of the engine.In addition, the factors which may affect the dynamic characteristics were analyzed, thus the modal parameters as well as the approach to optimize the low frequency dynamic characteristics were obtained.In view of large number of subassemblies and complicated structure of the engine, the finite element model of the engine was established by assemble the finite element model of the substructures in combination with some modal test of subassembly.The results show that the first modal frequency of the engine in current state is 8.8 Hz.The optimized results show that the horizontal stiffness in the corresponding direction of the servo loop structure can be enhanced dramatically, which makes the corresponding modal frequency of the engine improved significantly by increasing the dip angle of the pull rod.

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Last Update: 2020-04-25