DIRECT MEASUREMENT OF MOMENT MOBILITY .2. AN EXPERIMENTAL-STUDY

Two moment exciter configurations are compared both experimentally and through error analysis formulation in order to determine their effectiveness in performing moment mobility measurements. This error analysis, found in the companion paper (Part I), is applied in deriving corrections for actual measurements, in the assessment of the excitation's quality and in judging the sensitivity of the measurement object to false excitation. In order to demonstrate the possibilities and limitations of the proposed methods, experimental results are compared with calculations for two different beam structures. It is seen that the greatest obstacle to overcome in the measurement of moment mobility is the size of the moment exciter's mass.