Experimental validation of a numerical prediction model for free field traffic induced vibrations by in situ experiments
✍ Scribed by G. Lombaert; G. Degrande
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 900 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0267-7261
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✦ Synopsis
This paper deals with the validation of a numerical model for traf®c induced vibrations. Road unevenness subjects the vehicle to vertical oscillations that cause dynamic axle loads, which generate waves propagating in the subsoil. A 2D vehicle model is used for the calculation of the axle loads from the longitudinal road pro®le. The free ®eld soil response is calculated with the dynamic Betti±Rayleigh reciprocity theorem, using a transfer function between the road and the receiver that accounts for dynamic road±soil interaction. The validation relies on the measured response of the vehicle's axles and the soil during the passage of a truck on an arti®cial unevenness with speeds varying from 30 to 70 km/h. The agreement between the numerical and the experimental results is good: the in¯uence of the vehicle speed and the distance from the road is well predicted, while the ratio of the predicted and the measured PPV is less than two.