薄壁梁自由振动的两相局部-非局部本构模型分析

IF 1.9 4区工程技术 Q2 ACOUSTICS

Journal of Vibration and Acoustics-Transactions of the Asme Pub Date : 2023-02-14 DOI:10.1115/1.4056908

Muhsin Gökhan Günay

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引用次数: 1

摘要

基于薄壁梁理论，建立了具有非局部特性和任意截面的纳微尺度梁的自由振动分析数学模型。采用两相局部-非局部本构公式定义本构关系。利用哈密顿原理推导出运动方程。采用基于位移的有限元方法对模型的局部和非局部部分进行求解。得到了非局部箱形梁和碳纳米管的数值结果并进行了检验。一般情况下，增加非局部参数或非局部部分的体积分数会降低固有频率。

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Free Vibration Analysis of Thin-Walled Beams Using Two-Phase Local-Nonlocal Constitutive Model

A mathematical model is developed based on the thin-walled beams theory for free vibration analysis of nano/micro scale beams having nonlocal property and arbitrary cross-section. Constitutive relations are defined by using two-phase local-nonlocal constitutive formulation. Equations of motion are derived by use of Hamilton's principle. Both the local and nonlocal part of the model is solved by the displacement-based finite element method. Numerical results are obtained and examined for nonlocal box beams and collapsed carbon nanotubes. In general, it is observed that the natural frequency decreases by increasing the nonlocal parameter or the volume fraction of the nonlocal part.

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来源期刊

Journal of Vibration and Acoustics-Transactions of the Asme 工程技术-工程：机械

CiteScore

4.20

自引率

11.80%

发文量

审稿时长

7 months

期刊介绍： The Journal of Vibration and Acoustics is sponsored jointly by the Design Engineering and the Noise Control and Acoustics Divisions of ASME. The Journal is the premier international venue for publication of original research concerning mechanical vibration and sound. Our mission is to serve researchers and practitioners who seek cutting-edge theories and computational and experimental methods that advance these fields. Our published studies reveal how mechanical vibration and sound impact the design and performance of engineered devices and structures and how to control their negative influences. Vibration of continuous and discrete dynamical systems; Linear and nonlinear vibrations; Random vibrations; Wave propagation; Modal analysis; Mechanical signature analysis; Structural dynamics and control; Vibration energy harvesting; Vibration suppression; Vibration isolation; Passive and active damping; Machinery dynamics; Rotor dynamics; Acoustic emission; Noise control; Machinery noise; Structural acoustics; Fluid-structure interaction; Aeroelasticity; Flow-induced vibration and noise.