Journal of Theoretical
and Applied Mechanics

54, 3, pp. 783-794, Warsaw 2016
DOI: 10.15632/jtam-pl.54.3.783

Time-independent stochastic design sensitivity analysis of structural systems with second-order accuracy

Hanna Weber
In the paper, the static sensitivity of complex structures with respect to random design parameters is presented. Using the adjoint system method, based on the mean-point second-order perturbation method, the first two probabilistic moments of time-independent sensitivity are formulated with means and cross-covariances of random design parameters as the input data. It enables one to obtain the second-order accuracy of the solution. The presented formulations are illustrated by a number of numerical examples. The influence of finite element mesh density for the obtained results is discussed using the analysis of the spatial bar dome.
Keywords: design sensitivity, statics, random parameter, finite element