This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Prediction of Vehicle Radiated Noise
Annotation ability available
Sector:
Language:
English
Abstract
Engineers need the most capable design support tools to reconcile the demands of the market, legislation, economic design and production. Simulation tools are a very effective support system.
The optimization of the complete vehicle system for external noise radiation is very complex due to the interaction of the engine performance with the vehicle positioning. Simple predictive methods and assumptions are often not usefully accurate. The work described here covers an approach to combining rapid predictions of engine and vehicle performance with those of radiated noise from the various significant subsystems, to produce a useful, rapid, prediction tool for complete vehicle noise. A mono-dimensional gas flow code is used to provide a sufficiently accurate prediction of the engine power for vehicle performance prediction and also the noise output of intake and exhaust systems.
Various approximate prediction methods are used to assemble an overall vehicle radiated noise prediction. This takes account of vehicle performance, size, component location and sub-sources such as the exhaust shell noise. The derivations of the approximations and the assumptions in the code are given. The results of various examples illustrate the overall effectiveness of this combined approach to vehicle noise modeling. Continuing development is underway which uses an improved flow code (GTPower) which effectively covers both the engine pipe gas flows and the performance modeling, including the acoustic radiation from the intake and exhaust.
Recommended Content
Authors
Citation
Pilo, L., Gamba, F., and Challen, B., "Prediction of Vehicle Radiated Noise," SAE Technical Paper 971985, 1997, https://doi.org/10.4271/971985.Also In
References
- Simulation of acceleration Pass-by noise considering the Acoustic radiation characteristics of a vehicle body Fujita K. Abe T. Hori Y. JSAE Review 7 3 Oct. 1996
- On factors of noise emitted by a small vehicle and noise level simulation of pass-by test Masuko Takeshi SAE 770011
- Computer simulation of vehicle fuel economy and performance Hori Y Fukeda Kobyashi SAE 860364
- A Survey of Passenger Car Noise Levels Morrison D. Challen B.J. SAE 790442
- Passenger Car Noise Control Measures and their Effects on Fuel Economy, Weight and Cost Morrison D. Challen B.J. Trella T. SAE 800439
- Note on two common problems of sound propagation Journal of Sound & Vibration 1969 10 3 472 479
- Noise reduction by distance from sources of various shapes Maekawa Z. Applied Acoustics 1970
- A method of predicting engine noise in vehicle pass-by noise Hashimoto Nogami Najkata Andou JSAE Review April 1985
- A Review of Recent Progress in Diesel Engine Noise Reduction Challen B.J. Croker D.M. SAE 820517
- Test cell simulation of drive-by noise test SAE 870967
- Noise emission of road vehicles - evaluation of simple source models Favre Journal of Sound & Vibration 1983 91 4 571 582
- Relation between engine performance and noise Anderton D. Dixon J. Inst. of Sound and Vibration Research Automotive Group, Uni. of Southampton
- Drive-by noise predictable by computer simulation Bierman FISITA 1996