STP793

    An Interactive Tire-Fluid Model for Dynamic Hydroplaning

    Published: Jan 1983


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    Abstract

    An interactive tire-fluid model has been developed to serve as an aid in understanding dynamic hydroplaning of pneumatic tires. Dynamic hydroplaning occurs when the amount of fluid encountered by the tire exceeds the drainage capacity of the footprint region. The tire is completely separated from the pavement by a fluid film.

    Important advances in the present model are the automatic generation both of tire surface deformation in the contact region and of vertical axle displacement, both being due principally to fluid inertial forces. Present forms of the two major analysis modules comprising this model—tire deformation and fluid flow—are described in detail. Required experimental inputs including velocity, water film depth, and tire cross-sectional geometry are indicated. A description is then given of how these modules and the inputs they require are combined to form an interactive model. Examples are provided demonstrating the accuracy of the model's predictive capability. The effects of both speed and load on tire deformation in the footprint region and on axle height as predicted by the model are seen to be in agreement in trend with experimentally determined results.

    Keywords:

    tires, dynamic hydroplaning, tire deformation, mathematical model


    Author Information:

    Browne, AL
    Staff research engineers, Engineering Mechanics Department, General Motors Research Laboratories, Warren, Mich.

    Whicker, D
    Staff research engineers, Engineering Mechanics Department, General Motors Research Laboratories, Warren, Mich.


    Paper ID: STP28521S

    Committee/Subcommittee: F09.10

    DOI: 10.1520/STP28521S


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