Method and apparatus for measuring torsional rigidity of a shaft

摘要

A method for measuring the torsional rigidity distribution of a shaft comprises the steps of; disposing a shaft to be measured in a vertical position in which the upper end thereof is immovably held and the lower end of the shaft is rotatable about the axis of the shaft, demarcating the shaft along its length so as to establish a number of discrete sections of the shaft, performing measurements of the torsional frequency of an inertial mass held at designated discrete positions shaft, and calculating the torsional rigidity of each discrete section based on the measured torsional frequencies.