Method for Flexural Vibratin Damping of Rolling Stock Carbody

Method for Flexural Vibratin Damping of Rolling Stock Carbody

Yasufumi Suzuki Manager, Vehicle Noise & Vibration Lab., Fundamental Research Div.
Katsunori Akutsu Chief Researcher, Vehicle Noise & Vibration Lab., Fundamental Research Div.
Eiichi Maebashi Engineer, Intellectual Property Center
Minoru Sasakura Researcher, Vehicle Noise & Vibration Lab., Fundamental Research Div.
Takahiro Tomioka Researcher, Vehicle Noise & Vibration Lab., Fundamental Research Div.

A new method for enhancing the riding comfort by reducing 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 layer and constraint layer are pasted partially on the outside sheathing of the carbody. Riding comfort over the vertical track irregularities is analyzed theoretically by assuming that the carbody is a partially multi-layered beam. As a result of the analysis and the field tests on Shinkansen test car, it is concluded that this method can be a useful measure for enhancing the riding comfort of a lightweight carbody.