Stability analysis including wires of arbitrary radius in FD-TD code

Author

Grando, J. ; Issac, F. ; Lemistre, M. ; Alliot, J.

Author_Institution

Office Nat. d´Etudes et de Recherches Aerospatiales, Chatillon, France

fYear

1993

fDate

June 28 1993-July 2 1993

Firstpage

18

Abstract

A thin wire formalism has been previously implemented (R. Holland et al., 1981) in FDTD (finite-difference time-domain) code by introducing an in-cell inductance model of the wire. In the present work, a stability criterion is introduced for taking into account wires of radius less than or equal to half the cell size. To confirm the validity of this criterion, results obtained with the FDTD code ALICE for current injection are compared with the results of the code CRIPTE based on transmission line concepts. The application of the stability criterion has been useful for studying complex structures including a very dense set of internal wires. One example concerns the lightning strike of a helicopter in which wire bundles have been replaced by equivalent conductors having a diameter comparable to the cell size.<>

Keywords

finite difference time-domain analysis; lightning protection; numerical stability; stability criteria; transmission line theory; wires (electric); ALICE; CRIPTE; FDTD code; cell size; complex structures; current injection; equivalent conductors; finite-difference time-domain; helicopter; internal wires; lightning strike; stability criterion; thin wire formalism; transmission line; wires of arbitrary radius; Conductors; Finite difference methods; Helicopters; Inductance; Lightning; Stability analysis; Stability criteria; Time domain analysis; Transmission lines; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1993. AP-S. Digest

Conference_Location

Ann Arbor, MI, USA

Print_ISBN

0-7803-1246-5

Type

conf

DOI

10.1109/APS.1993.385412

Filename

385412