|Table of Contents|

Analysis on dynamic impact simulation of the connection structure of a pressure reducing valve(PRV)(PDF)

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

Issue:
2022年04期
Page:
72-80
Research Field:
目次
Publishing date:

Info

Title:
Analysis on dynamic impact simulation of the connection structure of a pressure reducing valve(PRV)
Author(s):
XUE Jie;  ZHANG Yuntao;  WANG Jun;  LI Feng
(Science and Technology on Liquid Rocket Engine Laboratory, Xian Aerospace Propulsion Institute, Xian 710100, China)
Keywords:
pressure reducing valve(PRV) connection structure impact dynamics axial force
PACS:
TH212 TH213.3
DOI:
-
Abstract:
In order to study the mechanical characteristics of the connection structure of a pressure reducing valve(PRV)in the aerospace system during the impact test, an elastoplastic model of metal materials was used to carry out an impact dynamic simulation analysis on the fixed connecting structure of the pressure reducing valve, based on the Hilber-Hughes Taylor implicit integration algorithm with second-order accuracy, which focuses on comparing the maximum axial force of the U-shaped ring and connecting screw in the two fixed connection structures under the impact environment, and further analyzes the mechanical mechanism of the difference in the axial force of the connection structure under the impact environment, by studing the pressure change of the connection structure on the PRV. The results were obtained: the fixed connection structure needs to have a continuous pre-tightening force during the impact process to ensure that the connection structure does not generate a stepwise increase in axial force during the process impact, the material yield ofconnecting parts(U-rings, screws), which will cause the remaining pre-tightening force of the connecting parts to decrease.Finally, a sufficient condition that the fixed connection structure can safely withstand multiple shocks was given, that is, the fixed connection does not yield material during the impact.

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