Nonlinear vibration of Timoshenko FG porous sandwich beams subjected to a harmonic axial load

作     者：Milad Lezgi Moein Zanjanchi Nikoo Majid Ghadiri Milad Lezgi;Moein Zanjanchi Nikoo;Majid Ghadiri

作者机构：Department of Civil EngineeringSharif University of TechnologyTehran ***Iran Civil Engineering DepartmentK.N.Toosi University of TechnologyTehran ***Iran Faculty of EngineeringDepartment of MechanicsImam Khomeini International UniversityQazvin ***Iran 

出 版 物：《Earthquake Engineering and Engineering Vibration》 (地震工程与工程振动（英文刊）)

年 卷 期：2024年第23卷第3期

页      面：649-662页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程] 

主　　题：sandwich beam Timoshenko beam parametric excitation bifurcation diagrams dynamic instability 

摘      要：In this study,the instability and bifurcation diagrams of a functionally graded(FG)porous sandwich beam on an elastic,viscous foundation which is influenced by an axial load,are investigated with an analytical *** do so,the Timoshenko beam theory is utilized to take the shear deformations into account,and the nonlinear Von-Karman approach is adopted to acquire the equations of ***,to turn the partial differential equations(PDEs)into ordinary differential equations(ODEs)in the case of equations of motion,the method of Galerkin is employed,followed by the multiple time scale method to solve the resulting *** impact of parameters affecting the response of the beam,including the porosity distribution,porosity coefficient,temperature increments,slenderness,thickness,and damping ratios,are explicitly *** is found that the parameters mentioned above affect the bifurcation points and instability of the sandwich porous beams,some of which,including the effect of temperature and porosity distribution,are less noticeable.