The calculation of structure inhomogeneity influence on eddy currents value in armor composite material

By a different approximation of the integral of Bessel??s functions product the accuracy of known method of an eddy cnrrents density calculation has increased. Besides the conditions have created for the representation of an eddy currents decrement, that is caused by structure inhomogeneity with the help of elementary functions only. The linearization of an obtained approximating dependence supplies the engineering calculation method of eddy currents decrement as a function of the effective sizes of the surface model crack, of the generalised parameter of transducer and of dielectric surface coat depth in armor composite material.