The effect of suspension damping on vehicle response to transient road inputs
The effect of suspension damping on vehicle response to transient road inputs
This thesis considers the transient response of suspension models of a vehicle traversing a versed-sine shaped bump. In the first instance, the damper is assumed to be linear which enables analytical solutions to be obtained for the displacement and acceleration shock spec tra. Numerical solutions are also obtained using the Runge-Kutta method. The analysis differs from much of the general shock and transient vibration literature in that the acceleration re sponse is considered for a displacement input. By considering bump traversal time of short and long durations relative to the natural period of the system, a simple expression has been determined for the peak acceleration in terms of the system's parameters, bump length and vehicle speed. U sing a two degree-of freedom (OOF) quarter car model, the effect of the unsprung mass on the peak acceleration is investigated by numerical simulations. The acceleration shock re sponse spectrum of the two OOF system is compared with that of the SOOF system. Exper imental work involving the measurement of accelerations of the sprung mass and unsprung mass of a passenger car has also been carried out to test the validity and limitations of the approximate relationship derived for the single degree-of-freedom (SOOF) system. A practical hydraulic automotive damper is considered and the principle of operation is discussed. Using experimental data from an automotive non-linear damper, a piece-wise linear damping model is established.
University of Southampton
Hyun, Youngjin
f7fa188d-fa18-4468-a77e-6843ed89562a
2005
Hyun, Youngjin
f7fa188d-fa18-4468-a77e-6843ed89562a
Hyun, Youngjin
(2005)
The effect of suspension damping on vehicle response to transient road inputs.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis considers the transient response of suspension models of a vehicle traversing a versed-sine shaped bump. In the first instance, the damper is assumed to be linear which enables analytical solutions to be obtained for the displacement and acceleration shock spec tra. Numerical solutions are also obtained using the Runge-Kutta method. The analysis differs from much of the general shock and transient vibration literature in that the acceleration re sponse is considered for a displacement input. By considering bump traversal time of short and long durations relative to the natural period of the system, a simple expression has been determined for the peak acceleration in terms of the system's parameters, bump length and vehicle speed. U sing a two degree-of freedom (OOF) quarter car model, the effect of the unsprung mass on the peak acceleration is investigated by numerical simulations. The acceleration shock re sponse spectrum of the two OOF system is compared with that of the SOOF system. Exper imental work involving the measurement of accelerations of the sprung mass and unsprung mass of a passenger car has also been carried out to test the validity and limitations of the approximate relationship derived for the single degree-of-freedom (SOOF) system. A practical hydraulic automotive damper is considered and the principle of operation is discussed. Using experimental data from an automotive non-linear damper, a piece-wise linear damping model is established.
Text
1004256.pdf
- Version of Record
More information
Published date: 2005
Identifiers
Local EPrints ID: 465852
URI: http://eprints.soton.ac.uk/id/eprint/465852
PURE UUID: 3296f215-dcaa-4445-8f6d-c1c8cc704df3
Catalogue record
Date deposited: 05 Jul 2022 03:17
Last modified: 16 Mar 2024 20:24
Export record
Contributors
Author:
Youngjin Hyun
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics