|Table of Contents|

Sensitive characteristics of structural parameters of pressure bearing and deformation compensation of S-shaped bellows in heavy duty engine(PDF)

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

Issue:
2022年02期
Page:
36-44
Research Field:
目次
Publishing date:

Info

Title:
Sensitive characteristics of structural parameters of pressure bearing and deformation compensation of S-shaped bellows in heavy duty engine
Author(s):
ZHAO Jian1; TAN Yonghua2; CHEN Jianhua1; GAO Yushan1
(1. Xian Aerospace Propulsion Institute, Xian 710100, China 2.Academy of Aerospace Propulsion Technology, Xian 710100, China)
Keywords:
S-shaped metal bellows flexible swinging component orthogonal experimental design analysis of vaniance
PACS:
V434.2
DOI:
-
Abstract:
The overall layout of ‘swinging behind the pump which is used for thrust vector regulation is adopted in Chinas 500 tf LOX/kerosene staged combustion engine for the first time. Among them, the flexible swinging component suitable for high-temperature, high-pressure and oxygen enriched gas environment is one of the key technologies that need to be overcome firstly. In this paper, a research method of structural parameter sensitivity for the multi-layer thin-walled S-shaped bellows of swing assembly based on orthogonal experimental design theory, nonlinear finite element method and mathematical statistics theory was proposed. In order to obtain the influence of its structural parameters on the structural characteristics such as swing stiffness and stability. The OPTIMUS was used as the control platform in this method, where the orthogonal test scheme of large samples based on the parametric nonlinear finite element simulation program could be automatically analyzed, and the data information could also be processed through correlation analysis, principal component analysis, analysis of variance and single factor response analysis. The effects of different influence factors on the pressure bearing performance and displacement compensation performance of S-shaped bellows were studied, and the sensitivity information of each influence factor was obtained as well. The results show that the number of layers and the thickness of single layer have a significant effect on the pressure bearing performance of bellows, while the wave distance and peak radius have little effect. The axial stiffness of bellows decreases as a hyperbolic function with the increase of wave number and layer number, and the influence of wave distance can be ignored.

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