EM field penetration inside the bridge of a ship

The bridge of a ship contains a large amount of sophisticated electronic equipment. The performance of this equipment must be ensured by hardening against external electromagnetic fields which may enter the bridge through windows, doors, and seams. For this reason it is essential to be able to predict the penetration of fields inside the bridge. In the present work the finite-difference time-domain (FDTD) method and the electric field integral equation (EFIE) implementation of the moment method are used to compute the electromagnetic fields inside the bridge. Effects of factors such as the shape of the incident pulse, the discretization of the structure, and the resonance of the structure on CPU time and accuracy of field computations are demonstrated.<>