Theoretical and experimental characterization of the EMP-interaction with composite-metallic enclosures

A numerical procedure is developed for the prediction of the electric and magnetic field distribution inside an enclosure having aluminum and carbon-fiber reinforced composite (CFRC) walls, illuminated by a transient electromagnetic plane wave. The composite panel is simulated by an effective layer model; time-domain surface impedance boundary conditions are enforced on the external faces of the composite slab, to express the relations among the tangential electric and magnetic field components. A coupling model for the calculation of the current induced along thin wires inside the enclosure is presented. The proposed models are implemented in a three-dimensional (3-D) finite-difference time-domain (FDTD) procedure, which is applied to the analysis of the shielding performances of an aluminum box with one CFRC face, illuminated by a transient electromagnetic wave. The computed results are compared with measured data obtained by using a full scale EMP generator.

[1]  Richard Holland,et al.  Finite-Difference Analysis of EMP Coupling to Thin Struts and Wires , 1981, IEEE Transactions on Electromagnetic Compatibility.

[2]  J A Plumer,et al.  Aircraft Lightning Protection Handbook , 1989 .

[3]  Ruey-Beei Wu,et al.  Transient propagation in anisotropic laminated composites , 1993 .

[4]  J. A. Catrysse,et al.  Correlation between shielding effectiveness measurements and alternative methods for the characterization of shielding materials , 1993 .

[5]  Cheng-Nan Chiu,et al.  Plane-wave shielding properties of anisotropic laminated composite cylindrical shells , 1995 .

[6]  Jose E. Schutt-Aine,et al.  An efficient implementation of surface impedance boundary conditions for the finite-difference time-domain method , 1995 .

[7]  K.F. Schoch,et al.  HANDBOOK OF ELECTROMAGNETIC MATERIALS , 1996, IEEE Electrical Insulation Magazine.

[8]  M. Ianoz,et al.  EMC Analysis Methods and Computational Models , 1996 .

[9]  M. S. Sarto.  A matrix surface impedance formulation for the analysis of EM-interactions to finite laminated composite slabs , 1996, Proceedings of Symposium on Electromagnetic Compatibility.

[10]  Shielding and reflection properties of periodic fiber-matrix composite structures , 1996 .

[11]  Test Report: Direct and Indirect Lightning Effects on Composite Materials , 1997 .

[12]  R. W. Evans.  Design Guidelines for Shielding Effectiveness, Current Carrying Capability, and the Enhancement of Conductivity of Composite Materials , 1997 .

[13]  M. D'Amore,et al.  Time-domain analysis of lightning interaction to aeronautical structures composite materials , 1997, IEEE 1997, EMC, Austin Style. IEEE 1997 International Symposium on Electromagnetic Compatibility. Symposium Record (Cat. No.97CH36113).

[14]  A. Semlyen,et al.  Rational approximation of frequency domain responses by vector fitting , 1999 .