Abstract
The ride dynamic characteristics of an urban bus were investigated through simulations with suspension component characteristics and were validated through field measurements. It was performed on highway road at a constant forward speed. A random vibration bus model with two parallel tracks of terrain profile was synthesized with superposition between the left and right sides as well as time delay between front and rear. The bus frequency response model was introduced with embedded modal extraction data to enhance computation efficiency. The simulation results of the bus model were derived in terms of acceleration PSD and frequency-weighted root mean square acceleration along the vertical axes at three locations, namely, driver side, middle, and rear passenger side, to obtain the overall bus ride performance. Another two sets of new leaf spring design were proposed as suspension parameter analysis. The simulation approach provides reasonably good results in evaluating passenger perception on ride and shows that the proposed new spring design can significantly improve the ride quality of the driver and passengers.
Highlights
Ride dynamics is a critical factor in evaluating the performance of a vehicle
The ride dynamics of a vehicle has been extensively raised parallel with the significant growth of computation power, which assists in seeking suspension design to provide comfortable ride
The proposed road power spectral density (PSD) of asphalt-concrete pavement was used as input to vehicle quarter model, and the ISO 2631-1 ride comfort criterion was implemented to identify the ride quality based on the spring stiffness and shock absorber damping effects
Summary
Ride dynamics is a critical factor in evaluating the performance of a vehicle. Evaluation of ride dynamics can be carried out either through computer simulation or experimental field data measurements. Another research work by Yang et al analyzed the ride comfort in a tractor with tandem suspension by conducting simulations using a multibody dynamic approach with specified road surface roughness [8]. The proposed road PSD of asphalt-concrete pavement was used as input to vehicle quarter model, and the ISO 2631-1 ride comfort criterion was implemented to identify the ride quality based on the spring stiffness and shock absorber damping effects. The stochastic time domain model was used to simulate responses on a vehicle for ride comfort analysis [11] and to estimate vehicle response and road friendliness [13, 14]. A comprehensive full bus ride dynamic model was derived with integration of shock absorbers, leaf springs, and antiroll bar characteristics to evaluate the suspension design concepts. Prolonged excessive vibration exposure causes sickness feeling, which could cause severe health problems or accidents
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call