A Day of Launch flight loads assessment technique that determines running loads calculated from flexible body coupled loads was developed for the Ares I-X Flight Test Vehicle. The technique was developed to quantify DOL flight loads in terms of structural load components rather than the typically used q-alpha metric to provide more insight into the DOL loads. In this technique, running loads in the primary structure are determined from the combination of quasi-static aerodynamic loads and dynamic loads. The aerodynamic loads are calculated as a function of time using trajectory parameters passed from the DOL trajectory simulation and are combined with precalculated dynamic loads using a load combination equation. The potential change in aerodynamic load due to wind variability during the countdown is included in the load combination. In the event of a load limit exceedance, the technique allows the identification of what load component is exceeded, a quantification of how much the load limit is exceeded, and where on the vehicle the exceedance occurs. This technique was used to clear the Ares I-X FTV for launch on October 28, 2009. This paper describes the use of coupled loads in the Ares I-X flight loads assessment and summarizes the Ares I-X load assessment results.


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    Titel :

    Use of Flexible Body Coupled Loads in Assessment of Day of Launch Flight Loads


    Beteiligte:
    Starr, Brett R. (Autor:in) / Yunis, Isam (Autor:in) / Olds, Aaron D. (Autor:in)

    Kongress:

    AIAA Atmospheric Flight Mechanics Conference ; 2011 ; Portland, OR, United States


    Erscheinungsdatum :

    2011-08-08


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Use of Flexible Body Coupled Loads in Assessment of Day of Launch Flight Loads

    Starr, B. / Yunis, I. / Olds, A. | British Library Conference Proceedings | 2011


    Use of Flexible Body Coupled Loads in Assessment of Day of Launch Flight Loads

    Starr, Brett / Olds, Aaron / Yunis, Isam et al. | AIAA | 2011


    Use of Flexible Body Coupled Loads in Assessment of Day of Launch Flight Loads

    Starr, B. / Yunis, I. / Olds, A. et al. | British Library Conference Proceedings | 2011