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Using an Inerter-Based Suspension to Reduce Carbody Flexible Vibration and Improve Riding-Comfort
Abstract:
The riding-comfort of high-speed trains affects the travel experience of
passengers, and the lightweight design technology of the carbody increases the
flexible vibration and reduces passenger comfort. To this end, a vertical
dynamics model of railway vehicles is established to demonstrate the potential
of using passive inerter-based suspensions to reduce the flexible vibration of
the carbody and improve riding-comfort. According to the characteristics of the
inerter component, an appropriate inerter-based suspension is applied to the
railway vehicle to reduce low-frequency resonance. The sum of the comfort
indexes of the three reference points of the carbody is optimized as the
objective function to improve the passenger comfort of the whole vehicle. The
results reveal that the inerter-based suspension applied to the primary or
secondary suspension has different effects on vehicle vibration. Compared with
the traditional suspension, the riding-comfort using the inerter in both the
primary and secondary suspension is improved by 21.3%, 9.3%, and 6.6%,
respectively.