NUMERICAL-SIMULATION OF PULSED EDDY-CURRENT NONDESTRUCTIVE TESTING PHENOMENA

被引：34

作者：

DAI, XW ^{[1
]}

LUDWIG, R ^{[1
]}

PALANISAMY, R ^{[1
]}

机构：

[1] TIMKEN CO,TIMKEN RES,CANTON,OH 44706

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1990年 / 26卷 / 06期

关键词：

D O I：

10.1109/20.102897

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A general-purpose hybrid finite element and finite difference computational model has been developed for the prediction of pulsed eddy-current distribution in metals for nondestructive testing purposes. The numerical model employs an axisymmetric formulation to study coil configurations suspended over a metallic specimen. As a driving function, a pulsed Maxwell-distributed current density is applied. Resulting eddy-current distributions are discussed as a function of conductivity, permeability, and lift-off. Furthermore, the transient voltage response of a coil over an infinite half-space is numerically computed and compared to the solution obtained by a novel analytical approach. The numerical model is then employed to determine the induced voltage due to a surface-breaking flaw. © 1990 IEEE

引用

页码：3089 / 3096

页数：8

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