scholarly journals Finite Element Analysis on Magnetic and Mechanical Characteristics for Hybrid Magnetic Bearing

2012 ◽  
Author(s):  
Hou Eryong ◽  
Liu Kun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Characteristics ◽  
Magnetic Bearing ◽  
Element Analysis

scholarly journals Dynamic characteristics of triaxial active control magnetic bearing with asymmetric structure

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Atsushi Nakajima ◽  
Katsuhiro Hirata ◽  
Noboru Niguchi ◽  
Masayuki Kato
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Active Control ◽  
Dynamic Characteristics ◽  
Negative Pressure ◽  
Axial Direction ◽  
Magnetic Bearing ◽  
Magnetic Bearings ◽  
Asymmetric Structure ◽  
Element Analysis

Abstract Supporting forces of magnetic bearings are lower than those of mechanical bearings. In order to solve these problems, this paper proposes a new three-axis active control magnetic bearing (3-axis AMB) with an asymmetric structure where its rotor is attracted only in one axial direction due to a negative pressure of fluid. Our proposed 3-axis AMB can generate a large suspension force in one axial direction due to the asymmetric structure. The performances of our proposed 3-axis AMB are computed through 3-D finite element analysis.

scholarly journals A Study on Designing Balloon Expandable Magnesium Alloy Stent for Optimization of Mechanical Characteristics

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 523
Author(s):  
Ichiro Shimizu ◽  
Akira Wada ◽  
Makoto Sasaki
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Study Design ◽  
Mechanical Characteristics ◽  
Design Parameters ◽  
Optimized Design ◽  
Element Analysis ◽  
Biodegradable Properties

Recently, the demand for a bio-absorbable coronary stent to promote recovery after an operation has increased. An option for such a stent is one made of a magnesium alloy, which has biodegradable properties. However, magnesium alloys have lower rigidity and lower ductility than other metals; as such, an appropriate stent structure is required to ensure radial rigidity. In this study, design parameters for an AZ31 magnesium alloy stent with sufficient radial rigidity were investigated. The necessary radial rigidity was determined by comparison tests against commercially available stents. The design parameters of the cell struts were selected and the optimum values to achieve high radial rigidity were investigated by means of elastic–plastic finite element analysis. Finally, a trial model stent based on the optimized design parameters was produced. It was confirmed that the model had sufficient radial rigidity, with no fracturing evident during crimping and expansion processes.

scholarly journals The construction technology and finite element analysis of the whole lifting of large grid

2021 ◽  
Vol 272 ◽  
pp. 02011
Author(s):  
Deyuan Deng ◽  
Weixiong Zhang ◽  
Zixuan Li ◽  
Guangjun Li ◽  
TianFang Mo ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Characteristics ◽  
Construction Technology ◽  
Practical Application ◽  
Safety Factors ◽  
Element Analysis ◽  
Static Mechanical ◽  
Application Requirements ◽  
Large Grid

Taking a large grid frame in a maintenance hangar of Guangzhou Baiyun Airport as the research object, the construction steps of lifting the grid structure are briefly described, and the static mechanical characteristics, dynamic mechanical characteristics and stability of the large grid frame were studied by using Midas/Civil finite element analysis software, which meets the design and the practical application requirements. Since its first six orders safety factors are greater than 4. The stress state of the nodes at the important supports in the grid is mainly controlled by axial force.

scholarly journals ANALYSIS OF ANALYTICAL MODELS AND THE DEPENDENCES REALIZED BY THEM FOR DEFINITION OF MECHANICAL CHARACTERISTICS OF COMPOSITE FILLERS

2021 ◽  
Vol 1 (161) ◽  
pp. 8-18
Author(s):  
A. Kondratiev
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Elastic Modulus ◽  
Information Technologies ◽  
Mechanical Characteristics ◽  
Sandwich Structures ◽  
Accuracy Assessment ◽  
Analytical Models ◽  
Element Analysis ◽  
Shear Moduli

The analysis of the accuracy of analytical models and the mechanical properties they implement is carried out for various types of composite aggregates of sandwich structures. The accuracy assessment of approximate analytical dependencies of the mechanical characteristics of the composite honeycomb core is given. The applicability of analytical dependencies at the initial stages of the design of cellular structures is established. The accuracy of the results of a numerical experiment is noted. This is due to the approximate nature of standard test methods. Both for the elastic modulus and for the shear moduli, their values obtained on the basis of information technologies of finite element analysis exceed their corresponding values determined by analytical dependencies. This excess over the corresponding analytical values for the shear moduli is close to a constant value for various reinforcement angles and does not exceed 1.14. For the elastic modulus of the first kind, the excess varies from 1.03 to 1.8 for various angles of cell reinforcement. The analytical dependences of the reduced mechanical characteristics of the tubular aggregate are obtained. The idea of the method for determining the mechanical characteristics of a tubular filler is to fulfill the requirement of equality of the relative axial and shear deformations of a conventional continuous type element and a real one, selected within one tube, taking into account only its material. The conclusion is drawn that the mechanical characteristics of the tubular aggregate, determined by the analytical model, to different degrees differ from the corresponding characteristics obtained on the basis of information technology of finite element analysis. Moreover, the difference in the elastic moduli of the first kind is much smaller than in the shear moduli. The reasons for these discrepancies are analyzed. It is justified and recommended to use constant correction factors for the analytical values of the reduced mechanical characteristics of the tubular aggregate, allowing their further use in the calculation of plate and shell sandwich structures.

Finite Element Analysis and Dynamics Charateristic Study for High-Speed Magnetic Suspension Motorized Spindle of CNC Machine Tools

2011 ◽  
Vol 317-319 ◽  
pp. 595-599
Author(s):  
Yu Xin Sun ◽  
Ling Ding ◽  
Tao Shi ◽  
Xian Xing Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Induction Motor ◽  
High Speed ◽  
Magnetic Bearing ◽  
Magnetic Suspension ◽  
Distinct Advantage ◽  
Motorized Spindle ◽  
Element Analysis ◽  
Spindle System

According to magnetic suspension motorized spindle system, high speed motorized spindle system based on bearingless induction motor is presented in this paper. The prototype of high speed motorized spindle system with bearingless induction motor is studied and analyzed by using finite element analysis software Ansoft/Maxwell and Riccati transfer matrix method, and compared with high speed motorized spindle system supported by Active Magnetic Bearing (AMB). The results show that high speed motorized spindle system with bearingless induction motor has distinct advantage of simple and compact structure, which is easier to realize high speed and extra-high speed operation.

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