Інституційний репозитарій Миколаївського НАУ

Free vibrations of an isotropic thick-walled circular cylindrical shell with one end rigidly clamped, and the other free, are investigated numerically and experimentally. The natural frequencies and corresponding mode shapes are determined using the finite element method within a three-dimensional elasticity formulation, employing solid finite elements. The article focuses on constructing a reliable finite element model, including selecting element types and mesh density based on accuracy, co...

This paper presents an HFSS-based procedure for quantifying the interference resilience of satellite-navigation antennas on autonomous platforms that employ digital antenna arrays and controlled reception pattern antennas (CRPAs). An individual element is first simulated to determine the operating band under the VSWR<2 criterion and to select the analysis frequency. The complete array is then solved with in-phase excitation to obtain the zenith peak gain P. Next, a phase distribution that enf...

The study examines the transformation of business models in the hospitality industry in response to digital technologies, platform integration, and changes in consumer behaviour. To identify patterns in business model development and to develop a methodological approach for assessing their effectiveness based on digital maturity and managerial factors. Design/Methodology/Approach: The article combined elements of a systematic review with empirical research, thereby developing a comprehensi...