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Vibration and damping analysis of orthotropic cylindrical shells with electrorheological core layer

机译：具有电流变芯层的正交异性圆柱壳的振动和阻尼分析

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摘要

The vibration and damping characteristics analysis of the orthotropic cylindrical shells with an electrorheological (ER) layer and a constraining layer are studied and discussed in this paper. An analytical model is developed and the discrete finite element method is adopted to investigate the vibration and damping characteristics of the sandwich orthotropic cylindrical shell system. And, the rheological properties of the ER material can be changed and controlled by applying various electric fields. In this study, the effects of thickness of the ER layer, constraining layer, applied electric fields on the vibration and damping characteristics of the sandwich cylindrical shell system are also discussed and found to affect the stiffness of the system and change the vibration and damping characteristics. It is seen that the larger applied electric fields, thickness of the constraining layer, and parameter E_1 have larger natural frequency and smaller modal loss factor, respectively. On the contrary, the smaller natural frequency and modal loss factor will be also obtained with the increments of the thickness of ER layer.
机译：本文研究并讨论了带有电流变（ER）层和约束层的正交异性圆柱壳的振动和阻尼特性分析。建立了解析模型，并采用离散有限元方法研究了正交异性夹芯圆柱壳系统的振动和阻尼特性。并且，可以通过施加各种电场来改变和控制ER材料的流变性质。在这项研究中，还讨论了ER层的厚度，约束层，施加的电场对夹心圆柱壳系统的振动和阻尼特性的影响，并发现它们会影响系统的刚度并改变振动和阻尼特性。可以看出，较大的施加电场，约束层的厚度和参数E_1分别具有较大的固有频率和较小的模态损耗因子。相反，随着ER层厚度的增加，也将获得较小的固有频率和模态损耗因子。

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