ELASTIC MATRIX DETERMINATION METHOD AND VIBRATION ANALYSIS METHOD FOR LAMINATE CORE OF TRANSFORMER

A transformer stacked iron core elasticity matrix determination method including: a step of acquiring a frequency spectrum of excitation noise; a step of acquiring a frequency spectrum of excitation magnetostriction; a step of calculating a frequency spectrum of a vibration response function when first and second provisional values of transverse elastic moduli are applied to an elasticity matrix; a step of calculating a frequency spectrum of excitation vibration based on frequency spectrum data of the excitation magnetostriction and the frequency spectrum of the vibration response function; a step of calculating a degree of coincidence between a frequency spectrum of noise and the frequency spectrum of the excitation vibration; a step of calculating the degree of coincidence for each combination of the first provisional value and the second provisional value; and a step of adopting the first and second provisional values as the transverse elastic moduli when the degree of coincidence is a local maximum value.