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Free vibration of thick isotropic and laminated beams with arbitrary boundary conditions via unified formulation and Ritz method

机译:统一公式和Ritz法在任意边界条件下厚各向同性和层合横梁的自由振动

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摘要

This paper presents an approximate solution for the free vibration of thick rectangular isotropic and laminated beams with arbitrary boundary conditions. The Carrera Unified Formulation is used in order to consider displacement theories of arbitrary order. The eigenvalue equation is obtained by minimizing an energy functional and the Ritz method is employed to approximate the displacement field. The functions used in the Ritz series can be accommodated to account for any of the classical boundary conditions. The results are validated by studying the convergence behavior and comparing the results with a 3D finite element solution. Natural frequencies are obtained for a variety of boundary conditions and length-to-thickness ratios. Accurate results are obtained, especially for the first mode of vibration which is the most important from an engineering perspective.
机译:本文为任意边界条件下的厚矩形各向同性和层合梁的自由振动提供了一种近似解。使用Carrera统一公式是为了考虑任意阶的位移理论。通过最小化能量函数获得特征值方程,并采用Ritz方法近似位移场。可以适应Ritz系列中使用的函数,以解决任何经典边界条件。通过研究收敛行为并将结果与​​3D有限元解决方案进行比较,可以验证结果。对于各种边界条件和长度/厚度比,都会获得固有频率。获得了准确的结果,尤其是从工程角度来看最重要的第一振动模式。

著录项

  • 来源
    《Applied Mathematical Modelling》 |2018年第9期|693-708|共16页
  • 作者

    FG Canales; JL Mantari;

  • 作者单位

    Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología (UTEC) Engineering and Technology;

    Faculty of Mechanical Engineering, Universidad de Ingeniería y Tecnología (UTEC) Engineering and Technology,University of New Mexico, Faculty of Mechanical Engineering;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Beam; 3D Solutions; Vibration; Ritz method; Unified formulation;

    机译:梁;3D解决方案;振动;Ritz方法;统一公式;

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