Design of Minimum Weight and Maximum Effectiveness of Very-Low-Frequency Shielding

Shielding equations developed in a research program were used to generate data for use in the design of an optimum shield for a given set of constraints (a prescribed shielding level, minimum weight shield, etc.). Analysis consisted chiefly of computer processing of the modified equations. To reduce computer time, only symmetrical laminated shielding material was considered. Maximum shielding attenuation with respect to overall shield weight was considered for two cases, using the transmission theory of uniform shielding: 1) the lightest shield for a specified level of attenuation, and 2) the shield providing maximum attenuation within specified constraints of shield weight.