NEW FINITE ELEMENT METHOD OF ELECTROMAGNETIC CALCULATION FOR COMPLEX ELECTROMAGNETIC FIELDS

2007 ◽  
Vol 21 (11) ◽  
pp. 655-662 ◽  
Author(s):  
NIAN LIU ◽  
CHI XIE ◽  
YING LIU ◽  
LU LIU ◽  
KE-XUN JIANG
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Fields ◽  
Electromagnetic Properties ◽  
Specific Work ◽  
Electromagnetic Device ◽  
Modern Physics ◽  
Experimental Values ◽  
Computation Speed ◽  
Element Method

In order to increase greatly the calculation accuracy and the computation speed for complex electromagnetic fields in modern physics, a new finite element method, which has the high computation accuracy, fast computation speed and less computer storage requirements, is presented in this paper. The new method with a high-order finite element without internal nodes is introduced to compute and analyze some complex electromagnetic fields in the electron accelerators. In this paper, the complex electromagnetic field in an electromagnetic device has been calculated successfully by the finite elements, and the electromagnetic properties of the electromagnetic device under the specific work condition is analyzed and evaluated. Good agreement is found between the computed values and the experimental values.

A HYBRID FINITE ELEMENT CALCULATION OF COMPLEX ELECTROMAGNETIC FIELDS

2008 ◽  
Vol 22 (04) ◽  
pp. 269-274 ◽  
Author(s):  
NIAN LIU ◽  
CHI XIE
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Fields ◽  
Electromagnetic Properties ◽  
Specific Work ◽  
Hybrid Finite Element Method ◽  
Hybrid Finite Element ◽  
Electromagnetic Device ◽  
Modern Physics ◽  
Element Method

In order to increase to a greater extent the calculation accuracy for complex electromagnetic fields in the modern physics, a hybrid finite element method (HFEM) is presented for analysis and simulation of complex electromagnetic fields. In the paper, the hybrid finite element method (HFEM) with high accuracy is introduced, and the complex electromagnetic field in an electromagnetic device has been calculated successfully by the hybrid finite element method (HFEM) and the electromagnetic properties of the electromagnetic device under the specific work condition is evaluated. It is shown that the method can provide a much more accurate calculation and good agreement between the computed values and the experimental values.

STUDY OF COMPLEX ELECTROMAGNETIC FIELD USING HYBRID ISOPARAMETRIC FINITE ELEMENTS

2008 ◽  
Vol 22 (24) ◽  
pp. 2429-2434
Author(s):  
NIAN LIU ◽  
CHI XIE
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Field ◽  
Work Conditions ◽  
Electromagnetic Properties ◽  
Specific Work ◽  
Electromagnetic Device ◽  
Isoparametric Finite Element ◽  
Isoparametric Finite Elements ◽  
Element Method

For complex electromagnetic fields in modern physics, a hybrid isoparametric finite element method (HIFEM) with high accuracy is introduced in the paper. The complex electromagnetic field in an electromagnetic device has been calculated successfully by the hybrid isoparametric finite element method (HIFEM) and the electromagnetic properties of the electromagnetic device under specific work conditions are evaluated. With the help of microcomputers, the electromagnetic simulation given in this paper is very useful in the analysis of operating properties under different work conditions and design of electromagnetic devices.

Least-square finite element method for electromagnetic fields in 2-D

1993 ◽  
Vol 58 (2-3) ◽  
pp. 143-167 ◽  
Author(s):  
J.S. Li ◽  
Z.Y. Yu ◽  
X.Q. Xiang ◽  
W.P. Ni ◽  
C.L. Chang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Fields ◽  
Least Square ◽  
Element Method

Scale Effects in the High Temperature Gas Pressure Forming of Electrodeposited Fine-Grained Copper Thin Sheet

2007 ◽  
Vol 551-552 ◽  
pp. 347-353
Author(s):  
K. Lei ◽  
Kai Feng Zhang ◽  
M.J. Tong
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
High Temperature ◽  
Scale Effects ◽  
Gas Pressure ◽  
Small Scale ◽  
Fine Grained ◽  
Experimental Values ◽  
High Temperature Gas ◽  
Element Method

Scale effects in the high temperature gas pressure forming of electrodeposited fine-grained copper thin sheets were investigated by a series of tests at various forming temperatures and die apertures. The average as-deposited copper grain size was 5 μm. The geometrical parameters of the bugling die system and the thickness of copper sheet varied in proportion. Different radius hemisphere parts from 0.5mm to 5mm were obtained at a strain rate of 5.0×10−4 s−1, which was controlled by pressure forces curves determined in terms of a finite element method (FEM) based on constitutive equation proposed by Backoften in 1964. The experimental relative bulging height (RBH) values were measured, and compared with that predicted by the same finite element method (FEM). It was found that the experimental values of large scale parts approach to simulated values, whereas the experimental values of small scale parts were quite different from simulated values. In order to explain these phenomena, a grain-rotation-weakened mechanism was proposed.

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