Dynamic Analysis of a Rotary Hollow Shaft With Hot-Fit Part Using Contact Elements With Friction

Chen, Shin-Yong; Kung, Chieh; Hsu, J.

doi:10.1139/tcsme-2011-0026

Cited by 16 publications

(10 citation statements)

References 22 publications

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“…According to Eqs. (12), (15), and (16), the enhanced coefficient of bending stiffness can be obtained as follows:…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

“…Petrescu et al [11] concluded the mass moments of inertia corresponding to different geometric shapes, objects, and profiles. Chen et al [12] studied the influence of a hot-fit rotor on the local stiffness of the hollow shaft and obtained the accurate natural frequencies using contact elements. Huang et al [13] optimized the contact stiffness factor of flexible rotor system of magnetic levitation motors and obtained the very close results of natural frequencies by ANSYS Workbench and modal experiment.…”

Section: Introductionmentioning

confidence: 99%

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Modal Analysis of a Thick-Disk Rotor with Interference Fit Using Finite Element Method

Fan

Ding

et al. 2018

Mathematical Problems in Engineering

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This paper is concerned with the modal analysis of a thick-disk rotor, which consists of an elastic shaft with a rigid thick disk assembled by interference fit, and the width of the thick disk is not negligible. Firstly, the friction moment on the contact surface of disk and shaft is deduced in terms of elastic theory, and a new enhanced coefficient of bending stiffness of assembly body is proposed and calculated for the first time. Secondly, the effect of the width of thick disk on diametrical moment of inertia, as well as the enhanced coefficient of bending stiffness of interference-fit part between disk and shaft, is included in the motion equations of thick-disk rotor, which are established based on finite element method, and the natural frequencies of rotor are obtained by solving the motion equations. Then the modal analysis is performed to get the natural frequencies in ANSYS Workbench, in which the friction coefficient and interference fit are set to be the same as those of the finite element calculation method. At last the modal experiment is done to verify the accuracy of calculation and simulation. The results show that the calculation values using enhanced stiffness of assembly part are in good agreement with those of ANSYS Workbench and experiment, and the percent errors of the first natural frequency and the second natural frequency are down to about 0.32% and 0.83%, respectively.

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“…According to Eqs. (12), (15), and (16), the enhanced coefficient of bending stiffness can be obtained as follows:…”

Section: Mathematical Problems In Engineeringmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modal Analysis of a Thick-Disk Rotor with Interference Fit Using Finite Element Method

Fan

Ding

et al. 2018

Mathematical Problems in Engineering

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“…To the surface mounted high-speed PM electrical machine, the rotor assembly has different contact way between the components. The authors in [14,15] used an equivalent local elastic modulus way to simulate the local stiffness of interference fit. The contact pressure on the shaft was computed by contact theory.…”

Section: Introductionmentioning

confidence: 99%

Rotordynamics modelling and analysis of high‐speed permanent magnet electrical machine rotors

Huang

2018

IET Electric Power Applications

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For the high-frequency permanent magnet electrical machine, a reasonable mechanical aspect design is crucial to meet its stability and reliability. This study focuses on the accurate modelling and analysis of the natural frequencies and modes of the rotor assembly for a designed and manufactured 100 kW 32,000 r/min motor. The influence of contact stiffness and friction on bending frequencies is analysed in detail. To obtain the accurate results of first two bending frequencies, on the basis of the finite-element method, the optimisation method is carried out to acquire appropriate variables of the contact stiffness and friction. The optimised results show that the method proposed in this study can realise the accurate analysis of the rotor mode, which are verified by free-free modal testing of the rotor.

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“…Chen et al 11 performed pre-stressed modal study of a hollow shaft assembly with shrink fits using Ansys. They used the native TARGE170 and CONTA174 contact elements of the software, and in order to verify the numerical results, experimental modal analysis (EMA) was performed.…”

Section: Introductionmentioning

confidence: 99%

Shrink-fitted joint behavior using three-dimensional solid finite elements in rotor dynamics with inclusion of stress-stiffening effect

Sikanen

Sopanen

2018

Advances in Mechanical Engineering

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In this article, the contact behavior of a shrink-fitted joint in a rotor assembly at different spin speeds is studied, using the three-dimensional solid finite element approach. A custom frictionless contact model is proposed and extensively tested by means of simulation. The theory for solving pre-stressed damped eigenvalue problem is presented and implemented, and the results are presented in Campbell diagram form. Two sample rotor assemblies are studied. In addition, experimental modal analysis results of a shrink-fitted joint with various interferences are presented and numerically studied. The reduction of the interference of the shrink-fitted joint due to centrifugal forces at high-speed operation as well as the contact status are updated at each rotational speed step. The inclusion of stress-stiffening effect is studied in detail. The comparison of the Campbell diagram results with the results obtained using a commercial finite element software (Ansys) shows a good agreement.

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Dynamic Analysis of a Rotary Hollow Shaft With Hot-Fit Part Using Contact Elements With Friction

Cited by 16 publications

References 22 publications

Modal Analysis of a Thick-Disk Rotor with Interference Fit Using Finite Element Method

Modal Analysis of a Thick-Disk Rotor with Interference Fit Using Finite Element Method

Rotordynamics modelling and analysis of high‐speed permanent magnet electrical machine rotors

Shrink-fitted joint behavior using three-dimensional solid finite elements in rotor dynamics with inclusion of stress-stiffening effect

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