|Table of Contents|

Discussion on topology optimal design of nozzle motion structure under dynamic load(PDF)

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

Issue:
2021年05期
Page:
42-48
Research Field:
研究与设计
Publishing date:

Info

Title:
Discussion on topology optimal design of nozzle motion structure under dynamic load
Author(s):
SHI Bo; HUANG Xuegang; ZHOU Jie; FU Lili; FAN Genmin
(Xian Aerospace Propulsion Institute, Xian 710100, China)
Keywords:
air breathing engine variable nozzle dynamic load topology optimization
PACS:
V432
DOI:
-
Abstract:
In order to optimize the variable nozzle motion structure under the complex dynamic force and variable thermal load,a new design method was proposed based on the idea of Equivalent Static Load(ESL). Firstly,the dynamic force load was extracted by rigid dynamics simulation,and then several working conditions were separated according to the motion process. In this way,the structure optimization under the dynamic load was transformed into the joint structure optimization under several static loads. The difficulty of solving problem was simplified. The topology optimization of nozzle motion structure was carried out with this method. The optimal structure was modified based on the calculation of strength and stiffness for multiple working conditions under force and thermal load. The final optimized structure was obtained by design iteration. The results show that the maximum displacement of the improved structure is reduced by 22% to 34%,the maximum stress is reduced by 10% to 15%,the weight is reduced by 24%. The effectiveness of the method has been proved,which provides a practical design method for structure optimization under dynamic force and variable thermal load.

References:

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