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NEW PASS-BY NOISE OPTIMIZATION METHODS FOR QUIET AND ECONOMIC HEAVY ROAD VEHICLES

Objective


All in all, a significant progress was made in a number of technology areas specifically for truck exterior noise, but also for general airborne radiation and transfer. And a large consensus on how to describe and handle airborne source strengths and the airborne transfer process was reached during the project. Apart from implementation in truck development, some of the methods have already been carried into other research projects where airborne noise control is envolved.

Exploitation has started; instruments, software, engineering know-how are available and modification on trucks are under investigation using some of the methods from this project.
The need to lower the noise emission of heavy vehicles (trucks,coaches) is give by new environmental awareness and by substantially more stringent acceptance levels for ISO pass-by noise qualification procedure in 1986. The vehicle manufacturers will meet these new standards,but the cost of doing so will be considerable. The aim of this project is to provide heavy vehicle manufacturers with new and improved tools that enable a faster and more accurate optimization of the vehicle in regard to lower noise emissions. This will lead to substantial cost savings by improved efficiency of the measures on the vehicle, by improved efficiency in the development process of components and by better design in respect to maintenance. A coherent network of necessary activities will take place:

- The identification of the noise sources on a vehicle will be improved.

- Data from tested measurements on components will be integrated with total vehicle noise.

- Optimization of shield configurations will be better controlled and more efficient by modelling guide-lines and by a new experimental Technique.

The consortium comprises heavy vehicle manufacturers,instrument, software and consultancy companies and two universities . By their joint effort some powerful tools will emerge that will increase the efficiency and technological content of European heavy vehicles.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

LMS INTERNATIONAL
Address
Interleuvenlaan 68
3001 Heverlee
Belgium

Participants (8)

BRUEL & KJAER A/S
Denmark
Address
Skodsborgvej 307
2850 Narum
Centro Ricerche Fiat ScpA
Italy
Address
Strada Torino 50
10043 Orbassano Torino
DAF TRUCKS
Netherlands
Address
Hugo Van Der Goeslaan 1
5600 PT Eindhoven
KUL
Belgium
Address
Celestijnenlaan 300 B
3001 Leuven
RENAULT V.I.
France
Address
1 Avenue Les Courbaisses
69800 Saint-priest
SAAB SCANIA AB
Sweden
Address

15187 Sodertalje
TNO
Netherlands
Address
Stieltjesweg 1
2628 CK Delft
University of Southampton
United Kingdom
Address
Highfield
SO9 5NH Southampton