Sensitivity and reliability analysis of a globe valve using an adaptive sparse polynomial chaos expansion

A globe valve is a type of valve used for isolating a piping part inside a circuitry. It generally consists of a movable element and a stationary seat which are relatively moved in order to create flow shutoff. The choice of material is crucial due to the presence of many sresses (pressure, temperature, corrosion, etc.). Among others, the rod has to resist to a possible high water pressure inside the circuit, the valve tightness has to be ensured. In practice, several material properties are notexactly known, and it is of major interest to account for this uncertainty in the system modelling. The current study is aimed at performing a sensitivity analysis of the rod maximum displacement as well as a reliability analysis with regard to the globe valve tightness.