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Off-Highway Vehicle Ride Comfort Analysis
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English
Abstract
The cab vibration and ride comfort of off-highway vehicles were analyzed using a multi-body system dynamics model that consists of cab and four isolation mounts. The vibrational Power Spectral Density (PSD) data measured on four mounting brackets was used as excitation input to the model to represent real-world situations. As specified in the SAE and ISO recommendations, a weighted rms acceleration was used as a measure of ride comfort or human perception of vibration severity of vehicles. The analytically predicted results have shown excellent agreement to the measured data.
Design optimization process or sensitivity analysis was demonstrated to investigate the effects on vehicle ride quality of isolation mount characteristics (axial and radial stiffness) and mounting configuration (mount location and orientation). It was found that, for certain field operating cases, a very significant improvement in tide performance could be achieved by properly specifying mount stiffness and mounting configuration.
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Citation
Li, W. and Somayajula, G., "Off-Highway Vehicle Ride Comfort Analysis," SAE Technical Paper 941815, 1994, https://doi.org/10.4271/941815.Also In
References
- Measurement of Whole Body Vibration of the Seated Operator of Off-Highway Work Machines SAE J1018 JAN 80
- Guide for the Evaluation of Human Exposure to Whole-Body Vibration ISO 2631 1978
- Measurement and Presentation of Truck Ride Vibrations SAE J1490 JAN 87
- Vibration Performance Evaluation of Operator Seats SAE J1384 MAY 83
- Himelblau, Harry, Jr. Sheldon Rubin Vibration of a Resiliently Supported Rigid Body Shock and Vibration Handbook Harris Cyril M. Crede Charles E. McGRAW-HILL BOOK COMPANY 1976