Influence on Coupling Vibration of Rotor System with Grouped Blades due to Mistuned Lacing Wire

Chiu, Yi-Jui; Chen, Dar‐Zen; Yang, Chia Hao

doi:10.4028/www.scientific.net/amm.101-102.1119

Cited by 4 publications

(6 citation statements)

References 11 publications

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“…Besides, the physical mechanism of the coupling RSDB system can be mathematically formulated by the analytical model, while the numerical model cannot offer physical mechanism interpretation directly based on the mathematical expressions. As a result, the analytical model is extensively adopted in the most literatures [9,20,[22][23][24][25][26], while only few are based on the numerical model [21].…”

Section: Introductionmentioning

confidence: 99%

“…Based on the continuum beam theory, some scholars explored the coupling vibration modeling of RSDB system [20,22], free vibration of RSDB system [17,23], abnormal vibration of blade-casing rubbing [9,25], vibration localization of mistuned RSDB system [24,26], etc. For example, Huang [22] established a coupling dynamic model of shaft torsional vibration and blade bending vibration based on Eluer beam theory.…”

Section: Introductionmentioning

confidence: 99%

“…With free vibration analysis, the TB (shaft torsionblade bending) and BB (blade bending-blade bending) coupling modes are observed. By using the same modeling method, the disk flexibility was then introduced by Yang [27] and Chiu [24]. The comparative results in literatures [22,27] suggest that the disk flexibility may induce a new coupling mode among shaft torsion, disk transverse and blade bending (TDB).…”

Section: Introductionmentioning

confidence: 99%

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Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Yang

Mao

et al. 2021

Nonlinear Dyn

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Rotating shaft-disk-blade (RSDB) system is one of the most important parts of turbomachinery, such as aero-engine, gas turbine and power plant. The coupling vibration of RSDB system with blade crack is vital for the blade health monitoring and crack detection of rotating blade. This study aims at addressing the dynamic modeling and steady-state coupling vibration mechanism of RSDB system with blade crack. First and foremost, on the basis of the stress state at crack section, an improved analytical breathing crack model (modified stress-based breathing crack model, MSBCM) for rotating blade is proposed. The validity of the proposed breathing crack model is verified by comparing the results obtained by MSBCM, finite element contact crack model and conventional analytical crack models. The comparative results suggest that MSBCM is of high fidelity and behaves best among the analytical crack models. Subsequently, a comprehensive dynamic model of the coupling vibration for RSDB system with blade crack is formulated on the basis of continuum

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Yang

Mao

et al. 2021

Nonlinear Dyn

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“…They are proposed to improve the stress intensity factor (SIF) method in the computations. The author's previous researches [20][21][22] only used assume mode method to analyze the influence on coupling vibrations among shaft-torsion and blade-bending coupling vibrations of a rigid single/multi disk(s) rotor system with grouped blades. This paper will explore the coupling behavior among shaft-torsion, disk-bending, blade-bending and the blades packeted by lacing wire.…”

Section: Introductionmentioning

confidence: 99%

“…This paper aims to provide a qualitative and quantitative overview of a multi flexible disc rotor system. Based on the authors previous researches [4][5][6] and [20][21][22] which only used AMM, the authors additionally used FEM to compare and add some interesting results.…”

Section: Introductionmentioning

confidence: 99%

Based on lacing wires influence of coupling vibration of a multi flexible disks turbine rotor system by two methods

Chiu¹,

Yang²,

Yu³

2017

J. vibroeng.

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This paper explored the blade-bending, disk-transverse and shaft-torsion coupling vibrations phenomenon of a multi flexible disc rotor system, whose blades subsystem was grouped with spring. Being different from the author's previous researches, here we used two methods: one is the assumed mode method (AMM) and the other is the finite element method (FEM), the proposed former one is main, and the latter one is complementary. Then compared the two results generated from them. According to the authors' previous definition, a flexible disc rotor system displays three coupling vibrations' types, inter-blade (BB), shaft-disk-blade (SDB) and disk-blade (DB) modes. In this paper, the authors additionally defined two new types, which were called lacing wires-blade (LB) and lacing wires-disk-blade (LDB) mode. The system change rules of natural frequencies and that of mode shapes would be discussed. Some interesting results are shown in this paper. Firstly, the author pointed out the change rules of the mode shapes and natural frequencies by using the AMM and FEM (including three kinds of softwares). Secondly, numerical calculation results also showed that the distance of disk, the disk with flexible, the constant of spring, and location of spring four phenomena would affect the natural frequencies.

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Nonlinear Dynamics and Vibration Localization of Shrouded Blisk with Contact and Friction Effects

Yuan

Wang

2023

Machines

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Shrouds have been widely used to reduce the level of excessive vibration of blisks. However, complicated nonlinear motion can be induced by the contact and friction between shrouds. Even worse, harmful localization of vibration can be encountered due to nonsmooth behaviour at the shroud contact interfaces in the tuned disk. In this paper, the nonlinear dynamics and localization of vibration of a shrouded blisk are studied considering the spin softening. The continuous parametric model of a shrouded blisk is established, and the transition boundaries between different status (i.e., stick, slip and separation) of shrouds are determined based on the Coulomb friction model. The steady-state responses of the blisk are analysed using variable rotation speed, and the primary resonance, beat and quasi-periodic vibration are presented in connection with the non-smooth behaviour of contact. A particular type of vibration localization initiated by the contact and friction effect of the shrouds in the form of asymmetric vibration in the tuned blisk is discovered. It is found that the blades-disk coupling has strong influences on the level of the localization. The effects of the contact stiffness and localization on the blade vibration are demonstrated through the change in the powers of the blade motions.

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Influence on Coupling Vibration of Rotor System with Grouped Blades due to Mistuned Lacing Wire

Cited by 4 publications

References 11 publications

Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Steady-state coupling vibration analysis of shaft–disk–blade system with blade crack

Based on lacing wires influence of coupling vibration of a multi flexible disks turbine rotor system by two methods

Nonlinear Dynamics and Vibration Localization of Shrouded Blisk with Contact and Friction Effects

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