Dynamics of aero-engine dual-rotor systems under multi-flight attitudes and simultaneous rub-impact faults

Tang, Peixun (author), Li, Zhengminqing (author), Ma, Xiaojing (author), Chen, Yiyan (author), Liu, Xi (author)

High-maneuverability combat aircraft exert extreme loads on aero-engines, potentially triggering destructive rotor-stator rub-impacts and thereby pose a severe threat to flight safety. This study establishes a four-degree-of-freedom (4-DOF) rotor-bearing-disk model for a dual-disk system, specifically tailored to simulate the coupling effects of simultaneous rub-impact faults under diverse flight attitudes and maneuver loads. For benchmarking purposes, a corresponding model free of rub-impact is accordingly constructed. The Newmark-β method is employed to derive solutions for both models. To evaluate how maneuver loads influence the dynamic characteristics of the system, a parametric investigation is conducted to assess the effects of dual-disk rub-impact across three key flight attitudes, namely, rolling, pitching, and yawing. This research offers a critical theoretical basis for enhancing vibration control and conducting failure analysis in fighter engine design, ultimately contributing to the development of safer and more reliable rotor systems.

• Language: English
• Keywords: rotor dynamics, maneuvering flight, bearing nonlinear force, rub-impact, nonlinear characteristic
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2025
• Number of pages: 10 str.
• Numbering: Vol. 71, no. 11/12
• PID: 20.500.12556/RUL-178268
• UDC: 629.7
• ISSN on article: 2536-3948
• DOI: 10.5545/sv-jme.2025.1428
• COBISS.SI-ID: 265731587
• Publication date in RUL: 22.01.2026

Record is a part of a journal

• Title: Strojniški vestnik
• Shortened title: Stroj. vestn.
• Publisher: Fakulteta za strojništvo
• ISSN: 2536-3948
• COBISS.SI-ID: 294943232

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian

Abstract

Letala z visoko okretnostjo povzročajo izjemne obremenitve letalskih motorjev, kar lahko sproži uničujoče trke med rotorjem in statorjem ter tako predstavlja resno grožnjo varnosti leta. V tej študiji je bil vzpostavljen model rotorja z ležaji in diski s štirimi prostostnimi stopnjami za sistem z dvema diskoma, posebej zasnovan za simulacijo sklopljenih učinkov sočasnih trkov med rotorjem in statorjem obremenitvah v manevrih. Za primerjavo je bil izdelan tudi referenčni model brez trkov. Rešitve za oba modela so bile pridobljene z metodo Newmark-β. Za oceno vpliva manevrskih obremenitev na dinamične značilnosti sistema je bila izvedena parametrična analiza učinkov hkratnih trkov obeh diskov pri treh ključnih letalnih načinih – valjanju (rolling), nagibanju (pitching) in smernem zasuku (yawing). Raziskava ponuja pomembno teoretično osnovo za izboljšanje nadzora vibracij in izvedbo analiz odpovedi pri zasnovi motorjev bojnih letal ter tako prispeva k razvoju varnejših in zanesljivejših rotorskih sistemov.

• Keywords: dinamika rotorja, manevrski let, nelinearna ležajna sila, torno-udarni stik, nelinearne karakteristike