Research on heat-elastic coupled vibration in a rotating rigid disk rotor system

Zhao, Ya-Zheng; Chiu, Yi-Jui; Yang, Cheng-Hsiung; Yu, Guo-Fei

doi:10.1007/s12206-022-0109-7

Cited by 6 publications

(3 citation statements)

References 27 publications

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“…As well as the total nonlinear forces of the oil film are calculated by the formulation given in following [13,29,30,31]:…”

Section: Modeling Of Ms5002b Turbine Bearing-rotor Systemmentioning

confidence: 99%

Practical bifurcation analysis for the vibration’s proficiency and their influences on gas turbine operations: Towards the digitization of their monitoring

Mahroug,

Hafaifa,

Iratni

et al. 2024

Scientia Iranica

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The emergence of modern technology in the oil and gas sectors presents an opportunity to enhance productivity, minimize environmental impact and optimize the energy efficiency of these facilities, leading to increased economic benefits. In pursuit of sustainable development in gas-turbine operations, this study develops a mathematical model that is validated through experimental tests for monitoring the vibrations of an MS5002B gas turbine located in a gas compressor station. The primary objective is to determine the bifurcation indices, ensuring the continuous stability of the studied turbine's operating state while monitoring its vibrations in real-time.A comparison between the experimental and numerical results of the developed model is validated against real operating data, enabling predictions of the complex dynamic behaviors within the bearingrotor system of the examined turbine. Robustness tests, based on real-time operating data, are conducted to analyze the impacts of undesirable effects that may disrupt the turbine system, as depicted in the bifurcation diagram. This approach facilitates the monitoring of the dynamic behavior of vibratory phenomena in the examined turbine, allowing for the establishment of reliable diagnostic elements to ensure component stability and prevent unscheduled production shutdowns. Ultimately, this approach enhances energy efficiency while delivering environmental and economic improvements.

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“…As well as the total nonlinear forces of the oil film are calculated by the formulation given in following [13,29,30,31]:…”

Section: Modeling Of Ms5002b Turbine Bearing-rotor Systemmentioning

confidence: 99%

Practical bifurcation analysis for the vibration’s proficiency and their influences on gas turbine operations: Towards the digitization of their monitoring

Mahroug,

Hafaifa,

Iratni

et al. 2024

Scientia Iranica

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“…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. Due to the limitation of thermal environment test conditions, simulation verification is mainly used.…”

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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“…In previous literature, the beam axis is considered collinear to the rotation center [10,11]. Since their potential engineering background may be helicopter rotor blades [12], aircraft engine [13], robotic manipulators, and turbine blades [14,15]. For the machine gun system, considering the rotating beam with an axis eccentricity is more appropriate.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a multi-pulse excited rotating beam system

Hua

2022

Preprint

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The periodic motion characteristic is crucial for the firing accuracy of the machine gun system. In this study, a demonstrated machine gun system is simplified as a rotating beam system to study its periodic motion characteristic under a multi-pulsed excitation. Unlike the previously rotating beam model, the beam axis and the rotation center are non-collinear. The nonlinear coupled dynamic model of the system is derived by Rayleigh-Ritz method and Lagrange equation, and the dynamic responses are analyzed using Runge-Kutta method. Based on the computed responses, the effect of rotating radius, beam length, torsional stiffness and damping on system dynamic behavior are analyzed and discussed. Results reveal that increasing the rotating radius and beam length could affect the periodic motion of the system gradually. Increasing the torsional stiffness could enhance the periodic motion characteristic of the rotating beam system. The quasi-periodic motion characterized of the system could be dominated by matching the torsional damping.

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Research on heat-elastic coupled vibration in a rotating rigid disk rotor system

Cited by 6 publications

References 27 publications

Practical bifurcation analysis for the vibration’s proficiency and their influences on gas turbine operations: Towards the digitization of their monitoring

Practical bifurcation analysis for the vibration’s proficiency and their influences on gas turbine operations: Towards the digitization of their monitoring

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

Dynamics of a multi-pulse excited rotating beam system

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