WEIGHT EFFECT ON COUPLED TOSIONALAND FLEXURAL VIBRATION OFA CONTINUOUS SHAFT
The coupled torsional and flexural vibration of a continuous shaft is studied, considering the misalignment of locus of the mass centers and that of the shear centers. The equations of coupled torsional-flexural vibration are established. The exciting torque, the damping properties and the eccentricity are taken into consideration in the equations. The coupled torsional-flexural vibration of a continuous simply supported shaft model with damping is studied, in which only the weight of the shaft itself is considered. The measurement in a practical simply supported copper shaft with constant section is made. The calculation results are compared with those of the measurement. It is found that the 1st, 3rd, 5th, ··· modes of the flexural vibration are coupled with the 2nd, 4th, 6th, ··· modes of the torsional vibration; the 2nd, 4th, 6th, ···modes of the flexural vibration are coupled with the1st, 3rd, 5th, ···modes of the torsional vibration.