Theoretical Analysis for Flexural Vibration Damping Method of
Rolling Stock Carbody
Yasufumi SUZUKI
A new method for enhancing the riding comfort by reduction of
vertical flexural vibration of a carbody is studied in this paper.
In order to dissipate energy of flexural vibration while minimizing
the weight to be added, viscoelastic layers and constraint layers
are pasted partially on the outside sheathing of the carbody. Riding
comfort, including the flexural vibration of the carbody excited by
vertical track irregularities, is analyzed theoretically assuming that
the carbody is a partially multilayered beam. As a result of the
analysis it is revealed that there exists an optimum length of the
damping layers which produce the maximum damping. It is found that
damping of the vibration can be maximized by choosing appropriate
characteristics of the damping layers. It is concluded that this
method can contribute to better riding comfort of a lightweight
carbody of a high-speed train.