RELIABILITY ESTIMATION OF CSKD USING PROBABILISTIC TECHNIQUES

Abstract: The compressor suction knockout drum is a type of pressure vessel which is used to remove the liquid droplets carryover in gases to protect the downstream process equipment. The knockout drum helps in improving the life of the compressor and resists the corrosion. The present work deals with design, modelling and static structural analysis of the compressor knockout drum. The first step involves generating the model using CATIA V5. Later, the model is dumped into ANSYS software to perform static, fatigue and modal analysis. The von Mises stresses are estimated at locations such as the crown, equator, and shell portions of the drum. The von-Mises stresses are obtained by analytical approximation and compared with ANSYS results. Now the internal pressure and thickness of the drum are assumed to be random and Monte Carlo simulations are used to know the statistical nature of von Mises distribution at various locations of the drum. Finally, the reliability of the drum is to be estimated using Random variable approach.

Keywords: Knockout drum, Modelling, Static analysis, Fatigue life, Random variable.