Optimization Study of the Shear Moduli of Magnetic Foil-Sheet and Its Implication into the Noise Simulation

The accurate prediction of transformer noise is a critical challenge in vibroacoustic engineering, particularly due to the complex mechanical behavior of grain-oriented (GO) electrical steels used in magnetic core laminations. This study presents an optimization-based methodology to identify the in-plane shear modulus of domain-refined electrical steel foil-sheets, a parameter that significantly influences the dynamic and acoustic response of transformer cores but remains poorly characterized in literature.