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Communication Dans Un Congrès Année : 2018

Validation of a Brush-based approach to model runway friction measuring device

Résumé

Water on runways may significantly reduce aircraft braking performances. That's why pilots have to be informed about runway surface conditions, so they can calculate their required landing distance. Friction measuring devices are generally used to characterize runway surface conditions. These devices provide results that may not be representative of aircraft braking performances due to scale-effect (mass, speed, pressure...). A research work has therefore been launched by STAC and IFSTTAR in the framework of a PhD thesis to relate aircraft braking performances to ground friction measurements. A Brush-based model has been adapted to take into account the effect of water and applied to both one friction measuring device and aircrafts. This paper focuses on the validation of this model applied to the friction measuring device. Friction-slip curves have been measured by STAC laboratory on the IFSTTAR friction test tracks using the French reference runway friction device (IMAG, Instrument de Mesure Automatique de Glissance). The IMAG has been equipped with two tires (PIARC smooth tire and a grooved aircraft tire). A pool has been designed to maintain constant water depths ranging from 4 to 46 mm. Three increasing speeds have been tested until tires aquaplaning. A total of 35 friction-slip curves have been experimentally obtained and compared with predicted friction coefficients. Results show that the model is adapted to the IMAG configuration and measurements. The combined effect of water depth, vehicle speed and tire grooves is correctly described by the model, with an error in the range of +/- 0,06 friction unit. In this PhD thesis, a new approach is implemented to correlate IMAG friction measurements and aircraft braking performances on a physical basis. This physical basis makes this approach adaptable to any friction device, thus open the way to a physical harmonization of friction measurements.
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Dates et versions

hal-01852303 , version 1 (01-08-2018)

Identifiants

  • HAL Id : hal-01852303 , version 1

Citer

Jonathan Gerthoffert, Veronique Cerezo, Mickaël Thiery, Mohamed Bouteldja, Minh-Tan Do. Validation of a Brush-based approach to model runway friction measuring device. 8th Symposium on Pavement Surface Characteristics: SURF 2018 - Vehicle to Road Connectivity, May 2018, BRISBANE, Australia. ⟨hal-01852303⟩
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