航空发动机转子螺栓结构均匀性连接设计

doi:10.7527/S1000-6893.2026.33548

Abstract

Abstract:

Uniform connection is crucial for ensuring the high performance and reliability of connected parts in aero-engines. Connection interface design presents an innovative approach for achieving uniform connection. Focusing on the widely used bolted fasteners in aero-engines， this study investigates the application of interface shape design and stiffness design to improve connection uniformity in aero-engine rotor bolted structures. The uniformity degree of contact stress distribution at the connection interface is used to characterize connection uniformity. An analysis model for the connection uniformity of an aero-engine rotor bolted structure is established. A design method for interface shape and stiffness based on stress distribution is proposed. Subsequently， bolted interface shape and stiffness designs are conducted targeting connection uniformity of the established aero-engine rotor bolted structure. The influence of bolt preload consistency on the achieved connection uniformity post-interface design is further analyzed. The results indicate that both bolted interface shape design and stiffness design can increase the effective contact area by over 100% and reduce the contact stress distribution variance by over 90%. Furthermore， these results demonstrate robust resistance to bolt preload fluctuations， maintaining significant improvement in connection uniformity for the aero-engine rotor bolted structure within a preload fluctuation range of 20%. It is hoped this research will promote connection interface design to become a mature engineering technology in the field of aero-engine design and manufacturing.

Key words: aero-engine, bolted connection, connection uniformity, connection interface, contact stress distribution, assembly design, interface design

CLC Number:

V263

Jinyan DUAN, Yicong ZHOU. Uniform connection design of aero-engine rotor bolted structures[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(19): 633548.

Figures/Tables 15

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References 22

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参数	栓接界面Ⅰ		栓接界面Ⅱ
参数	方差/MPa²	离散度	方差/MPa²	离散度
初始	535.81	1.627	511.40	1.641
界面形状设计后	45.85（降低91.44%）	0.625（降低61.60%）	0.538（降低90.81%）	0.632（降低61.46%）
界面刚度设计后	21.03（降低96.07%）	1.517（降低6.76%）	23.81（降低95.34%）	1.564（降低4.64%）

Uniform connection design of aero-engine rotor bolted structures

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