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首页> 外文期刊>Composite Structures >Earthquake induced dynamic deflection of submerged viscoelastic cylindrical shell reinforced by agglomerated CNTs considering thermal and moisture effects
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Earthquake induced dynamic deflection of submerged viscoelastic cylindrical shell reinforced by agglomerated CNTs considering thermal and moisture effects

机译：考虑热和湿气效应的碳纳米管加固的水下粘弹性圆柱壳地震诱发的动态挠度

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摘要

This study gives a numerical work on dynamic response of cylindrical shells submerged in an incompressible fluid subjected to earthquake, thermal and moisture loads. The cylindrical shell is reinforced by carbon nanotubes (CNTs) where the Mori-Tanaka model is used for calculating the effective material properties of the structure considering agglomeration effects. The effect of the fluid is assumed using the acoustic wave equation. The structural damping effect is considered using Kelvin-Voigt model. Sinusoidal shear deformation shell theory (SSDT) is utilized in the shell dynamical equations based on energy method and Hamilton's principle. The problem is framed combining shell motion equations with the acoustic wave equation where the fluid-loaded terms are considered with Hankel function of second kind. Differential quadrature method (DQM) and Newmark approach are employed to solve the shell problem. The influences of fluid, boundary condition, thermal load, moisture changes, boundary condition, structural damping parameter, length to thickness ratio of shell, CNTs volume percent and agglomeration are shown on the dynamic deflection of the structure. The results show that increasing the CNTs volume percent, the dynamic deflection decreases while considering the CNTs agglomeration leads to increase in the dynamic deflection of the structure.
机译：这项研究对淹没在不可压缩流体中的圆柱壳在地震，热和湿气作用下的动力响应进行了数值研究。圆柱壳由碳纳米管（CNT）增强，其中使用了Mori-Tanaka模型来计算考虑结块效应的结构的有效材料性能。使用声波方程假设流体的影响。使用Kelvin-Voigt模型来考虑结构阻尼效果。基于能量法和汉密尔顿原理的正弦剪切变形壳理论（SSDT）被应用到壳动力学方程中。该问题的构架是将壳运动方程与声波方程相结合，其中考虑了带有第二种汉克尔函数的流体项。差分正交方法（DQM）和Newmark方法用于解决壳问题。流体，边界条件，热负荷，水分变化，边界条件，结构阻尼参数，壳的长度与厚度之比，CNTs的体积百分比和结块的影响都显示在结构的动态挠度上。结果表明，增加碳纳米管的体积百分比，动态挠度减小，同时考虑到碳纳米管的团聚导致结构的动态挠度增加。

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