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Optimal suspension damping and axle vibration absorber for reduction of dynamic tire loads

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Optimal suspension damping and axle vibration absorber for reduction of dynamic tire loads

Muluka, Venu (1998) Optimal suspension damping and axle vibration absorber for reduction of dynamic tire loads. Masters thesis, Concordia University.

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Abstract

Variations in the dynamic tire forces of commercial freight vehicles, known to accelerate the road damage, are strongly related to vibration modes of the vehicle associated with vertical and pitch motions of the sprung and unsprung masses. The high levels of tire induced road damage caused by heavy vehicles has prompted a growing demand for the design of road-friendly vehicles. In this study, the enhancement of road friendliness of heavy vehicles is investigated using two methods to control the resonant forces: (i) Determination of optimal asymmetric force velocity characteristics of the suspension dampers to control the tire forces corresponding to the resonant modes; (ii) Optimal design of an axle vibration absorber to control the tire forces corresponding to the unsprung mass resonant modes. An analogy between the dynamic wheel loads and the ride quality performance characteristics of heavy vehicles is established through analysis of a linear quarter-vehicle model to illustrate the potential benefits of optimal damping. A weighted optimization function comprising the dynamic load coefficient (DLC) and the overall rms vertical acceleration at the driver's location is formulated to determine the design parameters of the damper and axle absorbers for a range of vehicle speeds and road roughnesses.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Thesis (Masters)
Authors:Muluka, Venu
Pagination:xvi, 135 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:Theses (M.A.Sc.)
Program:Dept. of Mechanical Engineering
Date:1998
Thesis Supervisor(s):Rakheja, Subhash
ID Code:591
Deposited By:Concordia University Libraries
Deposited On:27 Aug 2009 13:12
Last Modified:08 Dec 2010 10:15
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