THE YOUNG MODULUS ESTIMATION BY CORRELATING FEA AND EMA FOR AN ELECTRIC MOTOR TEST RIG
The Young modulus estimation for the material of an electric motor test rig is under observation in the present paper. Initially, the modulus of elasticity is approximated at a certain value and a numerical modal analysis is conducted on the test rig in order to find its natural mode shapes and their corresponding natural frequencies. Secondly, three uniaxial accelerometers are placed on the test rig in well-defined positions with the goal of measuring the frequency response functions of the part on three different directions. Lastly, the frequency response functions are analyze and successive runs of the modal analysis are conducted for different values of the Young modulus, until the calculated natural frequencies match the ones from experiment, on one side, and the mode shapes are correlated, on the other side.
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