When the integral equition method is applied to calculate the inductive magnetic field of the main deck model of a vessel, we use equivalent susceptibility to make the steel divisions under the deck into several solid steel units, so that the computation elements will be reduced and computing speed will be raised.

In this paper during computation of the inductive magnetic field of the superstructure model of ships, the equivalent susceptibility is studied.

It is pointed out that the equivalent permeability and permittivity of honeycomb-structured absorbing materials are smaller than those of the absorbing layer,but the equivalent permittivity is reduced more significantly,so the equivalent permeability is more close to the equivalent permittivity.

The effective permeability and permittivity tensors are calculated,the dispersive curv.

The results show that the effective permittivity and effective permeability of the composite medium are negative simultaneously in C-band frequency region, and therefore ind.

In this paper, according to the law of electromagnetic induction, the device measuring the equivalent susceptibility of metals was designed, which can real-time measure the change of the equivalent susceptibility of liquid metals during the cooling process.