All application of dynamic analytical methodology to determine the structural behavior of helicopter skid landing gear during a high-energy landing is demonstrated for the UH-1Y and AH-1Z helicopters. The UH-1Y is an upgraded version of the current UH-1N and the AH-1Z is an upgraded version of the current AH-1W. New landing requirements specified by the Navy for these upgraded models, as well as increased gross weight, pointed out the need for a new landing gear analysis methodology. These changes also underscored the need for a more efficient section for absorbing the impact energy for a hard landing. The cross section developed was a hollow rectangular crossbeam section. Currently in MSC/DYTRAN there is no beam element that simulates a hollow rectangular cross section. Therefore, an alternative modeling methodology was developed using plate elements. The paper demonstrates the use of this methodology in the correlation of level landing results, as well as developing the cg behavior and impact loads for a level landing with drag, for a rolled aircraft attitude, and a one-skid restricted landing.


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    Title :

    Application of skid landing gear dynamic drop analysis


    Contributors:


    Publication date :

    1999


    Size :

    9 Seiten, 2 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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