This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Analytical Investigation of Light Truck Low Frequency Vibration Issues
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1998 by SAE International in United States
Annotation ability available
After-shake vibrations can be defined as unpleasant low frequency vibrations (8--15 Hz) felt by the driver and passengers of a vehicle, which are excited by road irregularities. These vibrations typically have high vertical and lateral components, and may also involve fore-aft vibrations. Traditionally, experimental testing has been used in the automotive industry in order to find a way to cure the after shake vibrations, similarly to solving other vehicle vibration problems. This approach may provide information necessary to characterize the vibrations, but it cannot explain their origin, the nature of couplings among various vehicle subsystems, and the system sensitivity to its parameters and design modifications. In the paper, an analytical approach to identify the root cause of light truck after-shake vibrations is presented. The approach relies on building and correlating a mathematical model of the vehicle. This model is then used to assess system sensitivity and suggest modifications which would lead to improved vehicle after-shake behavior. The root causes of the after-shake vibrations are identified, and the effects of the assessed modifications are described. The paper concludes with a series of changes that are predicted by the model to reduce vehicle after-shake to an acceptable level. The results of experimental validation of the proposed modifications are also included.
|Technical Paper||Tire Structural Parameter Analysis for Road Noise Using an Accurate FEM Model|
|Technical Paper||The Laboratory Simulation of Tyre Noise|
|Technical Paper||Modal and Vibration / Stress Analysis of a Passenger Vehicle by FEM|
CitationJankowski, K., Dodd, P., Periam, D., and Hancock, D., "Analytical Investigation of Light Truck Low Frequency Vibration Issues," SAE Technical Paper 981170, 1998, https://doi.org/10.4271/981170.
- Bastow, D. Howard, G. 1993 Car Suspension and Handling Pentech Press London SAE Warrendale, PA
- Davis, D. C. 1974 ‘A radial-spring terrain-enveloping tire model,’ Vehicle System Dynamics 3 55 69
- Demic, M. 1996 ‘Optimization of characteristics of elasto-damping elements from aspect of oscillatory comfort and vehicle handling,’ Int. J. of Vehicle Design 17 1 76 91
- Müller, M. Eckel, H.-G. Leibach, M. Bors, W. 1996 ‘Reduction of noise and vibration in vehicles by an appropriate engine mount system and active absorbers,’ SAE Publications , No. 960185
- Peterson, R. R. 1954 ‘The effect of the car's suspension on car after shake,’ SAE Publications , No. 540064
- Timpner, F. F. 1965 ‘Design considerations in engine mounting,’ SAE Publications, No. 650093