Buckling reliability and sensitivity analysis of a composite stiffened panel with high-dimensional uncertainties

This paper presents an uncertainty analysis of composite stiffened panels with high-dimensional input parameters, encompassing reliability assessment and sensitivity analysis. Initially, a finite element model is developed. Subsequently, the uncertain parameters influencing the mechanical properties of the stiffened panels are identified, and finite element simulations are conducted. Following the simulation, various surrogate models are established and compared for accuracy, with results indicating that the high-dimensional surrogate model KDIC exhibits superior fitting accuracy. Finally, the probability of failure is computed, and a local sensitivity analysis (LSA) is performed to evaluate the influence of the input parameters.