A Load-Carrying Capacity Evaluation Method for the Welded Joints of Rocket Engine Frame

被引：1

作者：

Gao, Yushan ^{[1
]}

Huo, Shihui ^{[1
]}

Wang, Peiyan ^{[2
]}

Zhang, Ping ^{[1
]}

机构：

[1] Xian Aerosp Prop Inst, Sci & Technol Liquid Rocket Engine Lab, Xian 710100, Peoples R China

[2] Northwestern Polytech Univ, Dept Engn Mech, Xian 710129, Peoples R China

来源：

AEROSPACE | 2023年 / 10卷 / 04期

基金：

中国国家自然科学基金;

关键词：

load-carrying capacity; evaluation method; weld-failure stress; rocket engine frame; welded joints; structural stress method; STRENGTH; DEFINITION;

D O I：

10.3390/aerospace10040324

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

The load-carrying capacities of welded joints need to be paid attention to in the design of the frame, which transfers the thrust generated by the rocket engine to the rocket body. A load-carrying capacity evaluation method of welded joints based on the structural stress method is proposed in this study. Both the ultimate load-carrying capacity and fracture section angle are precisely obtained by the evaluation method. At the same time, a definition of weld-failure stress is given based on the evaluation method and tests. The load-carrying capacity of welded joints in the rocket engine frame is analyzed through the finite element model, including the overall structure and local weld details. The weld-failure stress of welded joints is obtained based on the analysis of three types of welded structures-standard shear specimen, U-shaped fillet welded specimen and pipe-plate fillet welded specimen. The safety factors of the transverse rod and longitudinal bearing rod welded joints of the frame are 8.6 and 13.4, respectively.

引用

页数：14

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