Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Vibration analysis and design optimization of sandwich beams with constrained viscoelastic core layer
Vibration analysis and design optimization of a sandwich beam with the core layer of viscoelastic material has been conducted in this paper. Finite element models based on the linear and nonlinear variation of displacement fields through the thickness of viscoelastic core layer have been developed to simulate the dynamic response of the sandwich beam. The results obtained by linear and nonlinear finite element models for the natural frequency and lost factor at the first mode of clamped-free sandwich beam do not show considerable difference. However for the clamped-clamped boundary condition especially for the second mode and higher, the results due to linear and nonlinear finite element models show considerable deviations as the thickness ratio increases. Nonlinear finite element model tends to show lower natural frequency but more loss factor compared with the linear finite element model as the thickness ratio increases. Systematic parametric studies have also been performed to verify the effect of the location and the length of treated and untreated patched on both natural frequency and the modal loss factor of the sandwich structure. Finally, a design optimization formulation has also been presented to identify the optimal location and the number of partially treated viscoelastic segments in order to maximize the damping performance of the sandwich beam.
Vibration analysis and design optimization of sandwich beams with constrained viscoelastic core layer
Vibration analysis and design optimization of a sandwich beam with the core layer of viscoelastic material has been conducted in this paper. Finite element models based on the linear and nonlinear variation of displacement fields through the thickness of viscoelastic core layer have been developed to simulate the dynamic response of the sandwich beam. The results obtained by linear and nonlinear finite element models for the natural frequency and lost factor at the first mode of clamped-free sandwich beam do not show considerable difference. However for the clamped-clamped boundary condition especially for the second mode and higher, the results due to linear and nonlinear finite element models show considerable deviations as the thickness ratio increases. Nonlinear finite element model tends to show lower natural frequency but more loss factor compared with the linear finite element model as the thickness ratio increases. Systematic parametric studies have also been performed to verify the effect of the location and the length of treated and untreated patched on both natural frequency and the modal loss factor of the sandwich structure. Finally, a design optimization formulation has also been presented to identify the optimal location and the number of partially treated viscoelastic segments in order to maximize the damping performance of the sandwich beam.
Vibration analysis and design optimization of sandwich beams with constrained viscoelastic core layer
Grewal, Jasrobin Singh (Autor:in) / Sedaghati, Ramin (Autor:in) / Esmailzadeh, Ebrahim (Autor:in)
Journal of Sandwich Structures and Materials ; 15 ; 203-228
2013
26 Seiten, 16 Bilder, 3 Tabellen, 17 Quellen
Aufsatz (Zeitschrift)
Englisch
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