Work

Modeling and Nonlinear Dynamic of Dual‐Rotor System With Misalignment During Aircraft Climbing Flight

Year: 2026

Type: article

Abstract: Misalignment of the dual‐rotor system in aeroengines may lead to abnormal vibration and rubbing faults between the rotor and the stator. The dynamic model of the dual‐rotor system with misalignment during aircraft climbing flight is presented in this paper. The dynamic equation of the dual‐rotor system is obtained from the Lagrange equation. The Runge–Kutta method is applied to find the solution to the dynamic equation of the system. The behavior of the rotor system with/without maneuvering load is examined, and the impact mechanism of the maneuvering load and the misalignment angle on the dynamic characteristics of the rotor system is revealed. This coupled modeling method has certain novelty in the overall consideration of rotor misalignment and maneuver load. The research results indicate that the maneuvering loads can decrease the system’s response types and affect the amplitude range, the trend, and the stability; interharmonics appear in the supercritical rotational speed zone; the growth in maneuver load aggravates the complex nonlinear phenomenon about the system. The research has important academic and engineering application value for rotor misalignment fault diagnosis and clearance design.

Source: Shock and Vibration

DOI: 10.1155/vib/6327946

Authors: Guofang Nan, Jinrui Hu, Jingya Yao, Chen Zhang, Bodong Zhang

Institution: University of Shanghai for Science and Technology

Language: English

Topic: Gear and Bearing Dynamics Analysis

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,760

Funder: National Natural Science Foundation of China