|Table of Contents|

Design scheme of composite truss frame(PDF)

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

Issue:
2019年02期
Page:
26-31
Research Field:
研究与设计
Publishing date:

Info

Title:
Design scheme of composite truss frame
Author(s):
MU Penggang1;  LIU Wenchao2;  DU Dahua1;  LI Binchao1
(1.Science and Technology on Liquid Rocket Engine Laboratory, Xi'an 710100, China; 2.Xi'an Aerospace Propulsion Institute, Xi'an 710100, China)
Keywords:
composite;  thrust frame;  truss;  upper-stage engine
PACS:
V250.3
DOI:
-
Abstract:
The thrust frame is a key transition component transfering the thrust from liquid rocket engine to the launch vehicle, and it performs an important role in the overall layout and transportation of the engine.In order to further reduce the structural weight of an upper-stage engine frame, the design scheme of composite thrust truss is investigated to substitute for high-strength steel frame.Based on the mechanical characteristic analysis for the original metal truss frame, a new structure scheme of carbon fiber/epoxy composite frame is proposed while the interface parameters and structure dimensions are same, and the detailed design together with affecting factors analysis are further studied.Firstly, section parameters and fiber winding angles of composite truss were optimally designed using the genetic algorithm toolbox of Matlab software.Secondly, the composite joints were designed by material equivalent method and the whole composite thrust truss was assembled.Finally, its strength, stiffness and stability were all evaluated.The results show that the newly designed composite frame achieves more than 40% weight loss on the basis of meeting the basic design requirements.The proposed method can provide reference for the structure design of composite truss structure.

References:

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Last Update: 2019-04-30