Structural Dynamic Response of Large Logistic V/STOL Vehicles

Abstract:
Preliminary designs are evolved for five large logistic V/STOL configurations. Structural elastic characteristics and mass distributions are calculated. The structural dynamic response is investigated for ground landing, take-off abort, maneuvers, gust penetration and landing conditions. The results of this investigation are tabulated in a matrix showing the degree and relative criticalness for the conditions and the V/STOL configurations. The degree of criticalness is established as the ratio of the peak dynamic loading and/or stress to the values used in the configuration design structural study. The latter structural loads and/or stresses are evolved through the use of existing military specifications or normal design practices.