An efficient three-dimensional foil structure model for bump-type gas foil bearings considering friction

Gu, Yongpeng; Lan, Xudong; Ren, Gexue; Zhou, Ming

doi:10.1007/s40544-020-0427-7

Cited by 18 publications

(5 citation statements)

References 45 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Baum et al [96] found that the suggested model is very computationally productive in respect of accuracy and time by using FEM and Galerkin's approach to determine pressure distribution, load-displacement curves, solution accuracy, and simulation time. The 3D deformation simulations of top or bump foil, bearing sleeve, contact between the bump and top foil, FEM approach, and misalignment for discretization have been studied by Yongpeng et al [97] and Zhao and Xiao [98]. They discovered that at the diverging area of the film, the top foil is momentarily disconnected from the assisting bump foil.…”

Section: Theoretical Research On Patbmentioning

confidence: 99%

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

CHAKRABORTY,

CHAKRABORTI

2023

Finnish J. Trib.

View full text Add to dashboard Cite

In several applications demanding precise and ultra-precision movements, porous aerostatic thrust bearings had been employed as a crucial precision engineering component and enabling technology. By acting as a lubricant between the moving part and the stationary part in aerostatic bearings, pressurized air almost completely eliminates friction. Since air acts as the lubricant, oil-based lubricants leave no debris behind. The air prolongs the life of the substances by preventing them from slipping and wearing. The aerostatic type uses graphite as a porous film to disrupt the air uniformly over the surface, or a tiny hole is drilled through the centre of the bearing to let the air circulate and produce a thin layer between the components. With an increased reliance on computational and mathematical methodologies for design and bearing performance optimization, this review paper aims to present the state-of-the-art in aerostatic bearings advancement and research. It also conducts a critical analysis of their future research directions and development trends in the next ten years and beyond. Air bearings are utilized in the production of tools like lathes, CMM, and grinders because they are highly precise in their operation and decrease mistakes and production time. Air bearings are available in a variety of forms and sizes. The assessment of future trends and obstacles in aerostatic bearings investigation, as well as their prospective applications in the precision engineering sectors, concludes the study.

show abstract

Section: Theoretical Research On Patbmentioning

confidence: 99%

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

CHAKRABORTY,

CHAKRABORTI

2023

Finnish J. Trib.

View full text Add to dashboard Cite

show abstract

“…It is a Winkler foundation model that assumes that the foil deflections are only dependent on the local air pressure. Furthermore, according to the authors of [28,29], the foil is assumed to deform uniformly in the axial direction, which has been shown to be a reasonable assumption. The governing equation of the SEFM with uniform deformation in the axial direction is written as follows:…”

Section: Foil Structurementioning

confidence: 99%

Calculation of Dynamic Coefficients of Air Foil Journal Bearings Using Time-Domain Identification

Feng

Liu

et al. 2023

Lubricants

View full text Add to dashboard Cite

Dynamic coefficients of a bearing are basic elements of rotor dynamics analysis. At present, there are still some issues in the calculation of the dynamic coefficient of air foil bearing. In this paper, the dynamic coefficients of the air foil bearing are calculated by time-domain identification. This method does not need to linearize the system equations, so it is generally applicable to different models for air foil bearings. Using the established method, this paper verified the calculation results using the foil model with axial uniform deformation for the first time, and the influence of the foil model on the dynamic coefficients was studied. The calculation results of the foil models with axial uniform deformation and axial independent deformation have significant differences. Furthermore, the accuracy of the dynamic coefficient method for different disturbance amplitudes was compared. The results indicate that the dynamic coefficient method has good accuracy over a large disturbance range.

show abstract

“…After the contact boundary detection, the contact forces between the possible contact patch pairs are calculated sequentially. The algorithm of slave points to master patches 34,44 is used to evaluate the contact forces, as shown in Figure 5C. The contact forces are then converted to equivalent nodal loads for obtaining ILCs.…”

Section: Contact Force Calculationmentioning

confidence: 99%

A free‐interface component mode synthesis of moving contact multibodies and its application to gear contacts

Yao

Shu

Ren

2022

Numerical Meth Engineering

View full text Add to dashboard Cite

Moving contact components are common in mechanical systems, and they exhibit a large rigid motion with linear‐elastic deflection under contact boundary conditions. The finite element method can capture local deformation and high gradient stresses, but finely meshed contact interfaces lead to numerous degrees of freedom. Model order reduction techniques for multibodies are effective, but moving contact interfaces also introduce multiple interface degrees of freedom. In the present method, the interface degrees of freedom are retained to ensure the accuracy of the local response induced by contacts, but the computational scale is not further enlarged. The motion of moving contact components is described by the floating frame of reference formulation. A free‐interface component mode synthesis method is proposed for model order reduction. Kept free‐interface normal modes represent global flexibility and residual modes accurately compensate for the local quasi‐static responses of omitted modes induced by contacts. The contribution of residual modes is represented by interface load coordinates, which can be directly evaluated by contact forces. The contacts are calculated with the present contact algorithm. The accuracy and efficiency of the proposed method are fully demonstrated through correlation with the finite element method in gear meshing simulations.

show abstract

An efficient three-dimensional foil structure model for bump-type gas foil bearings considering friction

Cited by 18 publications

References 45 publications

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

Design and Development of Different Applications of PATB (Porous Aerostatic Thrust Bearing): A Review

Calculation of Dynamic Coefficients of Air Foil Journal Bearings Using Time-Domain Identification

A free‐interface component mode synthesis of moving contact multibodies and its application to gear contacts

Contact Info

Product

Resources

About