A model is considered for analyzing the dynamic stability of a composite sandwich shell of asymmetric structure, stiffened by longitudinal ribs and a hollow cylinder, in loading by an external pressure and an axial force that varies with time according to a harmonic law. On a numerical example, for the first time, with the use of the mathematical model developed, the regions of instability were obtained, and investigation and analysis of influence of elastic moduli of the core and the reinforcing cylinder, the cylinder thickness, and the number of longitudinal ribs on the critical vibration frequencies of sandwich shells were carried out. The application of the model makes it possible to solve a new range of topical scientific and important practical problems.
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This work was carried out within the framework of the State Task of the Institute of Applied Mechanics of the Russian Academy of Sciences, Moscow (state registration No. 121112200126-5).
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Bakulin, V.N., Nedbay, A.Y. Dynamic Stability of a Composite Sandwich Shell with Longitudinal Ribs and an Internal Cylinder Loaded by an External Pressure and a Time-Varying Axial Force. Mech Compos Mater 59, 583–594 (2023). https://doi.org/10.1007/s11029-023-10117-7
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DOI: https://doi.org/10.1007/s11029-023-10117-7