Optimal design of an aerostatic spindle based on fluid–structure interaction method and its verification

Lu, Lihua; Chen, Wanqun; Wu, Bin; Gao, Qiang; Wu, Quanhui

doi:10.1177/1350650115611156

Cited by 17 publications

(14 citation statements)

References 16 publications

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“…The effect of design variables on friction force was studied and a significant decrease in friction force was observed. Recently Lihua Lu et al [19]. presented a novel method based on fluid-structure interaction for optimal design of an aerostatic spindle which deals with the optimization of structural bearing parameters like supply pressure, diameter orifice and a number of the orifice.…”

Section: Introductionmentioning

confidence: 99%

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

Dhande¹,

Pande²

2017

J Braz. Soc. Mech. Sci. Eng.

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Abbreviations e Eccentricity between shaft and bearing, m C Radial clearance, m R Radius of the shaft, m h Film thickness, m ω Angular velocity, rad/sec W Load carrying capacity, N O' Bearing centre O Shaft centre ρ Fluid density, kg/m 3 ρ l Liquid density, kg/m 3 ρ v Vapor density, (kg/m 3) v Fluid velocity P Static pressure, Pa τ Stress tensor F External body force, N t Time ε Eccentricity ratio σ Liquid surface tension coefficient v Fluid velocity vector C e , C c Mass transfer source terms connected to the growth and collapse of the vapor bubbles, respectively F cond Condensation coefficient F evap Evaporation coefficient p v Saturation pressure of the fluid [M s ] Structural mass matrix [M f ] Fluid mass matrix [F s ] Structural force matrix [F f ] Fluid force matrix [R] Coupling matrix Δh Relative rigid displacement of the two bearing surfaces δ Total elastic deformation of the shaft and bearing system Abstract This work deals with a study of a three-dimensional CFD analysis and multi-phase flow phenomena for hydrodynamic journal bearing with integrated cavitation. The simulations are carried out considering the realistic bearing deformations by two-way fluid-structure interactions (FSI) along with cavitation using ANSYS ® Workbench software. The design optimization module is used to generate the optimized solution of the attitude angle and eccentricity for the combination of operating speed and load. Bearings with and without cavitation are investigated. A drop in maximum pressure value is observed when cavitation is considered in the bearing. The rise in oil vapor distribution is noted with an increase in shaft speed which lowers the magnitude of the pressure build up in the bearing. The bearing deformations are analyzed numerically and found increasing with an increase in shaft speed. The experimental data obtained for pressure distribution showed good agreement with numerical data along with a considerable reduction in computation time.

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Section: Introductionmentioning

confidence: 99%

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

Dhande¹,

Pande²

2017

J Braz. Soc. Mech. Sci. Eng.

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“…The fluid-structure-coupled simulation was conducted in the ANSYS workbench software. 22 First, the FLUENT module was employed for fluid analysis. According to the practical situations, inlet pressure and outlet pressure were set as 0.5 MPa (gauge pressure) and 0 MPa (gauge pressure), respectively.…”

Section: Fluid-structure Coupled Analysismentioning

confidence: 99%

Dynamic performance analysis and quantitative evaluation for ultraprecision aerostatic spindle

Wei

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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For optics used in high-power laser beams, high accuracy requirements in full spatial frequency must be fulfilled. Among them, the allowable root mean square value is less than 5 nm in the PSD1 band. In order to evaluate the dynamic performance of the spindle system and put forward a quantitative index, a novel accurate model of the spindle system was built and a series of dynamic simulations were performed. Harmonic response analysis reveals natural frequencies and frequency response functions. Transient analysis indicates vibration waveforms of the tool-tip. Furthermore, by analyzing surface topography, it can be found that the medium-frequency waviness in the machined surface matches the vibration waveform. Obviously, the medium-frequency waviness is generated by the modal vibration of the spindle system. So that a quantitative index for the aerostatic spindle is proposed: when the amplitude of vibration in transient analysis is smaller than 8 nm, the allowable error in the PSD1 band can be fulfilled.

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“…But, the small deformation induced by air film force is also not considered in the CFD simulation model. 36,37 As the multiphysics coupling effect influence the performance of air bearing greatly, the optimal design of air bearing considering the multiphysics coupling effect needs to be investigated in our future research.…”

Section: Experimental Verificationmentioning

confidence: 99%

Optimal design of an annular thrust air bearing using parametric computational fluid dynamics model and genetic algorithms

Gao

Chen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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The performance of air bearing is highly influenced by the geometrical parameters of its restrictor. This study aims to maximize the load-carrying capacity and stiffness of air bearing, and minimize its volume flow rate by optimizing the geometrical parameters of restrictor. To facilitate the calculation of air bearing performance, a parametric computational fluid dynamics model is developed. Then, it is combined with multiobjective optimization genetic algorithm to search the Pareto optimal solutions. Furthermore, as a case study, the optimal design of an annular thrust air bearing is implemented. The stiffness of air bearing is improved 38.5%, the load-carrying capacity is improved 33.9%, and the volume flow rate is declined 19.6%, which are finally validated by experiments. It proves the reliability of proposed parametric computational fluid dynamics model and genetic optimization algorithm.

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Optimal design of an aerostatic spindle based on fluid–structure interaction method and its verification

Cited by 17 publications

References 16 publications

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

A two-way FSI analysis of multiphase flow in hydrodynamic journal bearing with cavitation

Dynamic performance analysis and quantitative evaluation for ultraprecision aerostatic spindle

Optimal design of an annular thrust air bearing using parametric computational fluid dynamics model and genetic algorithms

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