Stiffness and damping of a nonrolling tire were determined experimentally from both static force-displacement relations and the free-vibration behavior of a cable-suspended platen pressed against the tire periphery. Lateral and force-and-aft spring constants and damping factors of a 49 x 17 size aircraft tire for different tire pressure and vertical loads were measured assuming a rate-independent damping form. In addition, a technique was applied for estimating the magnitude of the tire mass which participates in the vibratory motion of the dynamic tests. Results show that both the lateral and force-and-aft spring constants generally increase with tire pressure but only the latter increased significantly with vertical tire loading. The fore-and-aft spring constants were greater than those in the lateral direction. The static-spring-constant variations were similar to the dynamic variations but exhibited lower magnitudes. Damping was small and insensitive to tire loading. Furthermore, static damping accounted for a significant portion of that found dynamically. Effective tire masses were also small.


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    Titel :

    Tire Stiffness and Damping Determined from Static and Free-Vibration Tests


    Beteiligte:
    R. K. Sleeper (Autor:in) / R. C. Dreher (Autor:in)

    Erscheinungsdatum :

    1980


    Format / Umfang :

    45 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch





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