Probabilistic Structural Analysis of Adaptive/Smart/Intelligent Space Structures

Abstract

A three-bay, space, cantilever truss is probabilistically evaluated for adap tive/smart/intelligent behavior. For each behavior the scatter (ranges) in buckling loads, vibration frequencies and member axial forces are probabilistically determined. Sensitivi ties associated with uncertainties in the structural, material and load variables that describe the truss are determined for different probabilities. The relative magnitude of these sensitivities is used to identify significant truss variables that control/classify its be havior to respond as an adaptive/smart/intelligent structure. Results show that the prob abilistic buckling loads and vibration frequencies increase for each truss classification, with a substantial increase for intelligent trusses. Similarly, the probabilistic member axial forces reduce for adaptive and intelligent trusses and increase for smart trusses.