Supercritical behavior of elastic thin-walled structural elements with an open cross-section
E.V. Karpov1,2, A.N. Prokhorov1,3, A.Yu. Larichkin1,2, V.N. Goverdovskiy1
1Moscow Polytechnic University, Moscow, Russia
2Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Tyubol Tsentr NSK, Novosibirsk, Russia
Keywords: thin-walled structures, supercritical deformation, elastic element of quasi-zero stiffness, infrafrequency vibration, vibration isolation
Abstract
An approach to the simulation and evaluation of the parameters of thin elastic open shells and plates under postcritical deformation is proposed. A finite element model of the longitudinal bending of a plate with a trough-shaped profile is considered. A numerical simulation of the behavior of a plate with quasi-zero stiffness was performed, and the effectiveness of such a plate as an elastic element of a vibration isolation mechanism was studied. Finite element simulation results were compared with the results of calculations using analytical models and with experimental data. The possibilities of adjusting the quasi-zero stiffness of plates were analyzed. The results obtained indicate that such elastic elements can be widely used in vibration isolation systems for ground and onboard equipment
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