轴向运动中多孔功能分级材料截顶锥壳的振动分析

Mechanics Pub Date : 2024-04-23 DOI:10.5755/j02.mech.34592
Weiwei Xiao, Siqi Liu, Xiaolin Huang, Xiaojun Wu, Xusheng Yuan
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引用次数: 0

摘要

本研究以经典薄壳理论为基础,建立了由均匀和非均匀分布孔隙的功能梯度材料制成的轴向移动截顶锥形薄壳的振动方程。采用 Galerkin 方法获得了自由振动和动态响应解。分析并讨论了轴向速度、半锥角、陶瓷材料质量成分、材料成分指数和内部孔隙率对所述壳体自由振动和动态响应的影响。结果表明,轴向速度、半锥角和材料成分指数的增加都会降低截顶锥形壳的固有频率,但会放大其动态响应;陶瓷材料质量分数的增加会提高截顶锥形壳的固有频率,但会降低其动态响应。结果还表明,与非均匀分布孔隙相比,均匀分布孔隙在轴向运动下对壳体动态响应的影响更为明显。
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Vibration Analysis of Porous Functionally Graded Material Truncated Conical Shells in Axial Motion
In this study, a vibration equation for axially moving truncated conical thin shells made of functionally gradient materials with uniformly and non-uniformly distributed pores has been established based on classical thin shell theory. The free vibration and dynamic response solutions are obtained using the Galerkin method. The effects of axial velocity, half cone angle, ceramic material mass composition, material component index, and internal porosity on the free vibration and dynamic response of mentioned shells were analyzed and discussed. The results show that the increase of axial velocity, half cone angle, and material composition index all decrease the natural frequency of the truncated conical shell but amplify its dynamic response, and the rise of the mass fraction of the ceramic material increases the natural frequency of the truncated conical shell but reduces the dynamic response. The results also demonstrate that compared with non-uniformly distributed pores, the effects of uniformly distributed pores on the shells’ dynamic responses are more evident under axial motion.
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