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Constrained-layer damping

About: Constrained-layer damping is a research topic. Over the lifetime, 795 publications have been published within this topic receiving 15758 citations.


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TL;DR: In this paper, the damping property analysis of laminated composite structures has been done based on the complex stiffness method (CSM) and numerical methods of finite element method and spectral finite element methods.
Abstract: Damping property analysis of laminated composite structures have been done based on the complex stiffness method (CSM). In view of laminated plates with viscoelastic material cores, investigation is conducted using CSM and numerical methods of finite element method and spectral finite element method. Simulation results show that analytical solutions by CSM are in good agreement with the two kinds of numerical solutions. The proposed analytical method is well suited to calculate and optimize the damping property of laminated structures especially composites with constrained layer damping treatment.

1 citations

Journal ArticleDOI
TL;DR: Bochkareva et al. as mentioned in this paper investigated multilayered metal-polymer-ceramic damping coatings and their FEMbased computer modeling that can provide an alternative spacer material in a constrained layer damping configuration so as to enable design of three and more layered damping structures, but with controlled structure and mechanical properties of the gradient damping layers.
Abstract: The focus of this paper is directed toward the investigation into multilayered metal‐polymer‐ceramic damping coatings and their FEM‐based computer modeling that can provide an alternative spacer material in a constrained layer damping configuration so as to enable design of three and more layered damping structures, but with controlled structure and mechanical properties of the gradient damping layers. An advanced measuring system for the analysis of vibrating structures is based on a laser scanning vibration interferometer. The position of a ceramic layer in a constrained layer configuration does matter. The outward position is most favorable for high strength by ceramic layer and damping by constrained aluminum‐polymer layer. Modal loss factors obtained in the 60%–80% partial‐coverage test cases of cylindrical shell are higher than the maximum modal damping obtained in the case of 100% coverage. The modal damping for the target modes is higher than in the complete‐coverage case. An effective damping design involves selecting a proper combination of area coverage, relative thickness and stiffness values of the layers of the damped configuration. [Dr. Bochkareva is currently continuing her research work under 2‐year EU INTAS 2005‐2007 postdoctoral fellowship Ref. No. 04‐83‐3067.]

1 citations

Journal Article
TL;DR: In this paper, a transfer matrix method was proposed for the dynamic analysis of cylindrical shells with active constrained layer damping (ACLD), which is more efficient to restrain the ground motion excitations when ACLD is divided into sub-blocks along circumference direction and the control voltage is applied in the way of depressing the dominant modes excited by external force.
Abstract: Based on the first order integrated matrix differential equation of a circular cylindrical shell treated with passive constrained layer damping(PCLD) derived by authors recently,combined with the constitutive equations for pizeoelastic material,and the proportional and differential(PD) control strategy,a new transfer matrix method was proposed for the dynamic analysis of cylindrical shells with active constrained layer damping(ACLD).The first order integrated matrix differential equation of the circular cylindrical treated with ACLD was obtained according to a simplified mechanically and electrically coupled model.Resorting to the free vibration and dynamic responses of an ACLD cylindrical shell under harmonic ground motion with one end clamped and the other end free,it was found that ACLD is more superior to PCLD in suppressing vibration;moreover,it can be pointed out that ACLD is more efficient to restrain the ground motion excitations when ACLD is divided into sub-blocks along circumference direction and the control voltage is applied in the way of depressing the dominant modes excited by external force.

1 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202310
202227
202123
202020
201927
201826