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Indexed by:期刊论文

Date of Publication:2018-05-01

Journal:PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES

Included Journals:SCIE、EI

Volume:99

Page Number:220-235

ISSN No.:1386-9477

Key Words:Natural frequency; Dynamic response; Double-nanobeam-systems; Symplectic method; Hamiltonian system

Abstract:A new Hamiltonian-based approach is presented for finding exact solutions for transverse vibrations of double-nanobeam-systems embedded in an elastic medium. The continuum model is established within the frameworks of the symplectic methodology and the nonlocal Euler-Bernoulli and Timoshenko beam beams. The symplectic eigenfunctions are obtained after expressing the governing equations in a Hamiltonian form. Exact frequency equations, vibration modes and displacement amplitudes are obtained by using symplectic eigenfunctions and end conditions. Comparisons with previously published work are presented to illustrate the accuracy and reliability of the proposed method. The comprehensive results for arbitrary boundary conditions could serve as benchmark results for verifying numerically obtained solutions. In addition, a study on the difference between the nonlocal beam and the nonlocal plate is also included.