Sharif Digital Repository

In static floating structures such as floating bridges and offshore runways that are in contact with the water surface from the floor and with the open air from the top, three types of interactions occur: the interaction of the structure with air, the interaction of the structure with water and Interaction of air with water. Due to the long length of such structures and approaching their natural frequencies to the standing wave frequencies (seiche frequencies), the analysis of the elastic behavior of the structure alone is not enough, but the structure-air-water interaction must be evaluated simultaneously in a system. Leading research addresses this issue and examines the behavior of an... 

Centrifugal compressors are widely utilized in various industrial systems; however, their performance under uncertain operating conditions is influenced by random variations parameters. This research presents a comprehensive investigation and analysis of uncertainties in the performance of the NASA low-speed centrifugal compressor (LSCC). The primary focus of this study is to analyze the impact of uncertain operating conditions such as total inlet pressure, total inlet temperature, mass flow rate, inlet flow angle, and rotational speed, all of which are modeled using the beta probability distribution. To conduct this analysis, the non-intrusive polynomial chaos expansion method has been...