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Cars, Trucks, & Quieter Pavements

Cars, Trucks, & Quieter Pavements. TRB ADC40 Noise & Vibration Committee Meeting July 9-12, 2006. Truck Noise Update. Work since July 2005 : Analysis of truck noise source testing using beam-forming Additional truck tire OBSI testing Implications of results.

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Cars, Trucks, & Quieter Pavements

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  1. Cars, Trucks, & Quieter Pavements TRB ADC40 Noise & VibrationCommittee Meeting July 9-12, 2006

  2. Truck Noise Update Work since July 2005: • Analysis of truck noise source testing using beam-forming • Additional truck tire OBSI testing • Implications of results

  3. Truck Noise Reduced Less by Pavement Changes

  4. Truck Noise Reduced Less by Pavement Changes Possible Reasons: • Contribution of noise sources different for cars & trucks • Truck tires behave differently than passenger car tires

  5. Beam Forming Applied to Trucks

  6. 50 mph Coastby – 1165 Hz

  7. Indicated Source Regions on a Tractor/Trailer Composite of Approximate Source Locations

  8. Truck Tire OBSI Tests at the NCAT Test Track • 7 Truck Tire Designs + 1 Car Tire • 8 AC Pavements • 45 mph

  9. Truck Tire Categories Trailer Drive Axle Steering

  10. OBSI Measurement of Truck Tires SI Probe

  11. OBSI Measurements for Truck Tires

  12. G167 G338 G372 G395 Aqua ZigZag XDA HT FS 560

  13. OBSI Levels Averaged for 8 Pavements G167 G338 G372 G395 Aqua ZigZag XDA HT FS 560 98.4 105.3 102.4 98.3 97.6 97.6 97.0 97.1

  14. Single Drive Axle Truck Passbys 50 mph

  15. Dual Drive Axle Truck Passbys 50 mph

  16. Truck & Tire Differences

  17. Dual Drive Axle Tractor/Trailer Passbys 50 mph

  18. G167 G372 G395 Aqua Fine Superpave Medium SMA Porous OGAC Transverse Texture

  19. Transverse Texture Superpave

  20. On Fine Aggregate Superpave

  21. On Medium Aggregate SMA

  22. On Transverse Texture Superpave

  23. On Coarse, Porous OGAC

  24. 167 Traction Tire on Different Pavements

  25. 372 Calculations 167 395

  26. Cars, Trucks, & Quieter Pavement

  27. Cars, Trucks, & Quieter Pavement

  28. Future Work • Improve Source Localization - NCHRP 8-56 • Improve Car & Truck “Model” (OBSI & Passby) • Coast vs. Cruise at Higher Speeds • Census of Traction vs. Highway Drive Tires • Develop Surrogate Test Tire

  29. Bye, Bye

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