含流体夹层圆柱壳的自由振动和低速冲击响应分析

IF 1.5 4区 材料科学 Q4 MATERIALS SCIENCE, COMPOSITES
R. Paknejad, F. Ashenai Ghasemi, K. Melekzadeh Fard
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引用次数: 0

摘要

研究了含有流体的夹层圆柱形壳体对自由振动和低速冲击的响应。研究采用了高阶剪切变形理论和结构-流体界面伯努利方程。为了求解所得到的方程并验证结果,采用了 Galerkin 方法和 Abaqus 有限元软件。该研究的主要创新点是利用位移场关系计算了顶层和整个夹层圆柱壳体的有效质量、等效密度以及撞击产生的压痕力。此外,为了计算冲击力和结构-流体相互作用,还使用了质量、弹簧和阻尼器的二自由度模型,并考虑了核心的挤压阻力。结果表明,在计算结构的固有频率和低速冲击力时,流体是一个重要而有效的因素。流体的存在使夹层圆柱形壳体的基本固有频率降低了 69%。夹层圆柱形壳体的夹芯和夹层厚度、长度和半径、流体的存在、各种边界条件、波数、纤维取向角、速度和冲击器质量等参数是研究振动、冲击和结构优化设计的重要影响因素。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Analysis of Free Vibration and Low-Velocity Impact Response on Sandwich Cylindrical Shells Containing Fluid

Analysis of Free Vibration and Low-Velocity Impact Response on Sandwich Cylindrical Shells Containing Fluid

The responses of sandwich cylindrical shells containing fluid to free vibrations and low-velocity impact were studied. The high-order shear deformation theory and Bernoulli’s equation for the structure-fluid interface were used. To solve the equations obtained and validate the results, the Galerkin method and Abaqus finite element software were employed. The main innovation of this research is the calculation of the effective mass of the top layer and the entire sandwich cylindrical shell containing fluid using displacement field relations, their equivalent density, and indentation force due to impact. In addition, to calculate the impact force and the structure-fluid interaction, a two-degree-of-freedom model of mass, spring, and damper with the effect of the crushing resistance of the core was used. The results show that the fluid is an important and effective factor in calculating the natural frequency and low-velocity impact on the structure. The presence of fluid reduces the fundamental natural frequency of the sandwich cylindrical shell by 69%. Parameters such as core and layer thickness, length, and radius of the sandwich cylindrical shell, presence of the fluid, various boundary conditions, wave number, fiber orientation angles, velocity, and mass of the impactor are essential and influential factors in studying vibrations, impact, and optimal design of structures.

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来源期刊
Mechanics of Composite Materials
Mechanics of Composite Materials 工程技术-材料科学:复合
CiteScore
2.90
自引率
17.60%
发文量
73
审稿时长
12 months
期刊介绍: Mechanics of Composite Materials is a peer-reviewed international journal that encourages publication of original experimental and theoretical research on the mechanical properties of composite materials and their constituents including, but not limited to: damage, failure, fatigue, and long-term strength; methods of optimum design of materials and structures; prediction of long-term properties and aging problems; nondestructive testing; mechanical aspects of technology; mechanics of nanocomposites; mechanics of biocomposites; composites in aerospace and wind-power engineering; composites in civil engineering and infrastructure and other composites applications.
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