scholarly journals High accuracy electromagnetic field solvers for cylindrical waveguides and axisymmetric structures using the finite element method

1993 ◽  
Author(s):  
Eric Michael Nelson
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Field ◽  
High Accuracy ◽  
The Finite Element Method ◽  
Cylindrical Waveguides ◽  
Axisymmetric Structures ◽  
Element Method ◽  
Electromagnetic Field Solvers

Calculation of Iron Loss in Large Hydro-Generator under Non-Load

2012 ◽  
Vol 433-440 ◽  
pp. 6096-6102
Author(s):  
Wei Li Li ◽  
Da Wei Liang ◽  
Yu Zhang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Electromagnetic Field ◽  
Structural Characteristics ◽  
Iron Loss ◽  
The Finite Element Method ◽  
Physical Fields ◽  
New Generation ◽  
Generator Stator ◽  
Element Method

Taking 1000MW air-cooled hydro-generator as an example, the solving region and mathematical model are given. Based on the theories of electromagnetic field, the stator iron loss of large generator under non-load is studied. Considering the structural characteristics of generator, the iron loss was calculated by using magnetic circuit method and the finite element method, respectively. First, the iron loss in generator stator is calculated basing on the theory of electromagnetic field. Then the steady state and transient fields were used to calculate and analyze the 2D electromagnetic field by finite element method. And the exact value and distribution of iron loss are obtained. Last, we obtain some useful conclusions through comparing the iron loss calculated by the two methods above. That will provide a theoretical basis for further study of the physical fields of new generation giant hydro-generators.

Study on the finite element method of Hamiltonian system with chaos

2020 ◽  
Vol 31 (11) ◽  
pp. 2050165
Author(s):  
Qiong Tang ◽  
YangFan Liu ◽  
Yujun Zheng ◽  
ChengJie Xu
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Conservative System ◽  
High Accuracy ◽  
Symplectic Method ◽  
The Finite Element Method ◽  
Kam Tori ◽  
Hamiltonian Chaos ◽  
Element Method

By comparing with symplectic different methods, the quadratic element is an approximately symplectic method which can keep high accuracy approximate of symplectic structure for Hamiltonian chaos, and it is also energy conservative when there have chaos phenomenon. We use the quadratic finite element method to solve the H[Formula: see text]non–Heiles system, and this method was never used before. Combining with Poincar[Formula: see text] section, when we increase the energy of the systems, KAM tori are broken and the motion from regular to chaotic. Without chaos, three kinds of methods to calculate the Poincar[Formula: see text] section point numbers are the same, and the numbers are different with chaos. In long-term calculation, the finite element method can better keep dynamic characteristics of conservative system with chaotic motion.

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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