Nonlinear and Linear Phenomenon Investigation of Coupled Vibration of a Multi-disc Rotor Based on Multi-mistuned Blades Length or Multi-disordered Staggle Angle Blades

Chiu, Yi-Jui; Zhao, Ya-Zheng; Li, Xiaoyun; Yang, Cheng-Hsiung; Yu, Guo-Fei; Ye, Chengwei

doi:10.1007/978-3-030-94301-1_4

Cited by 1 publication

(1 citation statement)

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“…Liu et al (2015) applied simulation software and experimental test equipment to study the thermal characteristics of high-speed shafts, which has reference significance for the research in this study. The mistuned blade length or disordered blade stagger angle in rotor systems was explored in more detail theoretically (Chiu and Huang, 2007, 2008; Chiu et al, 2021). Zhao et al (2022) investigated the inherent characteristics and vibrations of a rigid disk and a flexible blade rotor under localized thermal deformation.…”

Section: Introductionmentioning

confidence: 99%

Analytical, numerical, and experimental methods to study thermo-elastic coupling inherent and vibration characteristics of a flexible rotor system

Chiu

Zhao

Chen

et al. 2023

Journal of Vibration and Control

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The thermal deformation of a flexible rotor system in a high-temperature environment causes changes in the inherent and vibration characteristics. A theoretical model of the flexible rotor was established based on the theory of thermal deformation, the assumed mode method, and the Lagrangian principle. The mode natural frequencies and shapes were explored in detail when the temperature of different nickel-based alloy rotor blades increased gradually (from 0 to 1200°C). The changes in the unstable speed points as the temperature gradually increased were studied based on the rotation speed–frequency diagram. In addition, experimental methods were performed. Mode and steady-state speed tests in a supported state were conducted. Mode experiments were completed on a five-blade rotor test rig with a thermal insulation device, and the acceleration frequency-domain signal showed that the natural frequency decreased with increasing temperature. Through steady-state speed experiments, it was found that the position of the unstable speed points moved forward, and the displacement amplitude increased after local heating.

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