Affiliation of Author(s):航空学院

Journal:JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES

Key Words:Strain gradient beam Differential quadrature element method Vibration Elastic boundary conditions

Abstract:Background Numerous literatures on the vibrational analysis of structures based on the strain gradient elasticity theory (SGET) are only restricted to classic boundary conditions. However, the boundary conditions of structures in the engineering are different from those classic cases in nature. The purpose of this work is to develop a strong form differential quadrature element method (DQEM) to study the vibration of the strain gradient beams (SGB) with elastic boundary conditions. Method Vibration of gradient elastic materials with elastic boundary conditions is studied by an SGB model. This model is characterized by a sixth-order differential equation (SODE). A strong-form DQEM is developed to calculate six-order boundary-value problems. Excellent accuracy, simplicity, and high computational efficiency of the DQEM have been demonstrated by comparing with exact solution and available results. Results and conclusions Numerical results verify the good reliability and accuracy of the DQEM. Numerical results show that the nonlocal effect parameter, boundary spring Stiffness, and high-order boundary conditions have important influence on the vibrational behaviors of the SGBs.

ISSN No.:2523-3920

Translation or Not:no

Date of Publication:2019-12-01

Co-author:Jiang, Jingnong,wzw

Correspondence Author:WANG Lifeng