Pratt’s formula, in which the aircraft is modeled as a single-degree-of-freedom system, is used extensively to extract derived gust velocities from measured normal acceleration. There is evidence that airframe mass distribution along the longitudinal axis can affect the gust load alleviation factor. In this paper, the inclusion of the pitching degree of freedom in the model is explored, accounting for the aircraft mass distribution along the longitudinal axis. Two different two-degree-of-freedom models are presented and numerical solutions are offered. A typical heavy transport aircraft is used for illustration. It is shown that the inclusion of the second degree of freedom results in as much as 10% reduction in the magnitude of the gust load alleviation factor.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Higher-Order Estimations of Load Factor from Derived Gust Velocity


    Contributors:

    Published in:

    Journal of Aircraft ; 56 , 2 ; 591-596


    Publication date :

    2019-03-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Higher Order Estimations of Load Factor from Derived Gust Velocity

    Rokhsaz, Kamran / Kliment, Linda K. | AIAA | 2017


    Gust load factor principles

    Engineering Index Backfile | 1940


    Gust Load Factor Principles

    Shanley, Francis R. | Emerald Group Publishing | 1941


    Gust Loads with Uncertainty Due to Imprecise Gust Velocity Spectra

    Pettit, Chris / Hajj, Muhammad / Beran, Philip | AIAA | 2007


    Gust alleviation factor

    Zbrozek, J. K. | SLUB | 1958