Different Reformulations of Stochastic Optimization of the Transverse Vibration

The applicability of stochastic programming models and methods to PDE constrained stochastic optimization problem is discussed. The problem concerning the transverse vibration of a string is chosen. Therefore, the corresponding mathematical model involves a PDE-type constraint and an uncertain parameter related to the external load. A computational scheme for this type of problems is proposed, including discretization methods for random elements (scenario based two-stage stochastic programming) and the PDE constraint (finite difference method). Several deterministic reformulations are presented and compared using numerical and graphical results.