Dynamic Characteristics of Shaft System for Aero-engine Rotor Overspeed Burst Test

HUO Shiyu; CHANG Jiaqi; YANG Xiaolin; CHEN Yonghui; YAN Qun

doi:10.7643/issn.1672-9242.2026.08.008

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (8) : 58-67. DOI: 10.7643/issn.1672-9242.2026.08.008

Special Topic——Comprehensive Environmental Strength Analysis and Testing Technology for Equipment

Dynamic Characteristics of Shaft System for Aero-engine Rotor Overspeed Burst Test

HUO Shiyu, CHANG Jiaqi, YANG Xiaolin, CHEN Yonghui, YAN Qun

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Abstract

The work aims to reduce costs of aero-engine rotor overspeed burst tests and shorten the maintenance cycle of the test system, investigate the transient dynamic characteristics in rotor overspeed-burst tests, obtain the support reaction forces and stress distribution features of the shafting, and further explore more efficient test design methods. An overspeed-burst test was performed on a simulated engine turbine disk to capture the full-process rotor behavior from crack initiation to complete burst. The characteristics of transient unbalance excitation loads were analyzed. Based on ANSYS and MATLAB, an analytical method for rotor-dynamic responses of the shafting during typical simulated-disk overspeed-burst events was established. This method enabled calculation of shaft-support reaction forces and stresses at the annular notch of the test rotating shaft. Severe transient unbalance impact occurred for the simulated disk, yielding extremely large support reaction forces across the shafting, which decreased progressively from top to bottom. The stress at the notch of the rotating shaft far exceeded the ultimate strength of the shaft material. In conclusion, the proposed method for calculating shafting dynamic responses and notch stresses provides technical support for subsequent safety assessment of test systems and fuse-design of notches on test shafting.

Key words

aero-engine disk / overspeed burst / rotor dynamics analysis / unbalanced mass-induced loads / rotor disintegration impact / notch stress

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HUO Shiyu, CHANG Jiaqi, YANG Xiaolin, CHEN Yonghui, YAN Qun. Dynamic Characteristics of Shaft System for Aero-engine Rotor Overspeed Burst Test[J]. Equipment Environmental Engineering. 2026, 23(8): 58-67 https://doi.org/10.7643/issn.1672-9242.2026.08.008

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