Reduced magnetic vector potential and electric scalar potential formulation for eddy current modeling

نویسندگان

  • Zhiwei ZENG
  • Xin LIU
  • Yiming DENG
  • Lalita UDPA
  • Satish UDPA
چکیده

A finite element formulation using the reduced magnetic vector potential and the electric scalar potential is proposed for modeling eddy current nondestructive testing problems in which the probe coil scans across the sample. Excitation coil is not meshed and the remeshing is avoided during the motion of the coil. The mesh and system matrix remain unchanged with different coil positions. The incomplete factorization of the system matrix as preconditioner is performed only once during the entire scan, which results in a significant reduction of computation time. Streszczenie. Zaproponowano sformułowanie metody elementów skończonych, wykorzystujące zredukowany wektorowy potencjał magnetyczny i skalarny potencjał elektryczny, do modelowania wiroprądowych badań nieniszczących, w których cewka jest przesuwana nad próbką. Cewka wzbudzająca nie jest dyskretyzowana na elementy skończone. Siatka i macierz układu pozostają niezmienione przy różnych położeniach cewki. Niepełna faktoryzacja macierzy jest wykonywana tylko raz podczas całego skanowania, co prowadzi do skrócenia czasu obliczeń.(Sformułowanie wykorzystujące zredukowany wektorowy potencjał magnetyczny i skalarny potencjał elektryczny do modelowania prądów wirowych).

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A formulation of the eddy current problem in the presence of electric ports

The time-harmonic eddy current problem with either voltage or current intensity excitation is considered. We propose and analyze a new finite element approximation of the problem, based on a weak formulation where the main unknowns are the electric field in the conductor, a scalar magnetic potential in the insulator and, for the voltage excitation problem, the current intensity. The finite elem...

متن کامل

Compu1er Modeling of Pulsed Eddy-currents in Conducting Materials for Ndt Purposes

The numerical modeling of single frequency eddy-current phenomena based on the magnetic vector potential has been successfully applied to many NDT applications [1-3]. Despite the considerable wealth of sinusoidal eddy-current literature, the numerical modeling of pulsed eddy-currents has received little attention. Most of the recent finite element transient eddy-current NDT modeling [4,5] emplo...

متن کامل

Quasi-Static Theory for Uniaxial Chiral Omega Media

The problem of unbounded uniaxial chiral omega media in the presence of both static electric and magnetic point charges is investigated. For this purpose scalar electric and magnetic potentials in these media are introduced. Using these potentials, the corresponding electric and magnetic fields are determined. The similar problem of static electric and magnetic current sources with the goal of ...

متن کامل

2D Analytical Modeling of Magnetic Vector Potential in Surface Mounted and Surface Inset Permanent Magnet Machines

A 2D analytical method for magnetic vector potential calculation in inner rotor surface mounted and surface inset permanent magnet machines considering slotting effects, magnetization orientation and winding layout has been proposed in this paper. The analytical method is based on the resolution of Laplace and Poisson equations as well as Maxwell equation in quasi- Cartesian coordinate by using...

متن کامل

Electromagnetic Field Modeling in Human Tissue

For investigations of electromagnetic field distributions in biological structures by Finite Element Method (FEM), a method for automatic 3D model building of human anatomical objects is developed. Models are made by meshed structures and specific electromagnetic material properties for each tissue type. Mesh is built according to specific FEM criteria for achieving good solution accuracy. Seve...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007