Free In-Plane Vibration Analysis of Rectangular Plates With Elastically Point-Supported Edges

Abstract

In comparison with the transverse vibrations of rectangular plates, far less attention has been paid to the in-plane vibrations even though they may play an equally important role in affecting the vibrations and power flows in a built-up structure. In this paper, a generalized Fourier method is presented for the in-plane vibration analysis of rectangular plates with any number of elastic point supports along the edges. Displacement constraints or rigid point supports can be considered as the special case when the stiffnesses of the supporting springs tend to infinity. In the current solution, each of the in-plane displacement components is expressed as a 2D Fourier series plus four auxiliary functions in the form of the product of a polynomial times a Fourier cosine series. These auxiliary functions are introduced to ensure and improve the convergence of the Fourier series solution by eliminating all the discontinuities potentially associated with the original displacements and their partial derivatives along the edges when they are periodically extended onto the entire x-y plane as mathematically implied by the Fourier series representation. This analytical solution is exact in the sense that it explicitly satisfies, to any specified accuracy, both the governing equations and the boundary conditions. Numerical examples are given about the in-plane modes of rectangular plates with different edge supports. It appears that these modal data are presented for the first time in literature, and may be used as a benchmark to evaluate other solution methodologies. Some subtleties are discussed about corner support arrangements.

A unified solution for free in-plane vibration of orthotropic circular, annular and sector plates with general boundary conditions

“…Recently, a modified Fourier series technique proposed by Li [20,21] has achieved a wide range of application in the vibration of plate and shell structures with general boundary conditions by the Ritz method, e.g., [22][23][24][25][26][27][28][29][30][31][32][33][34][35]. In Ref.…”

Free vibration of functionally graded parabolic and circular panels with general boundary conditions

“…The improved Fourier series was proposed in 2000 by Li [47][48][49] to solve the free vibrations of beams with general boundary conditions. Later, the method has been fast extended by Du [50][51][52][53], Jin [54][55][56][57][58], Wang [59][60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77]et al in the last ten years. Thus, as a powerful method, the reasonable and superiority has been widely validated by comparing with other methods.…”

Vibrations of Composite Laminated Circular Panels and Shells of Revolution with General Elastic Boundary Conditions via Fourier-Ritz Method

“…Later, the method fast extended to cope with other structures (i.e. beams, plates, shells and coupled structures) by the Du [27][28][29][30], Jin [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46], Wang et al [47][48][49][50][51][52] in the last ten years due to the superiority compared with other methods. The detailed theoretical analyses and mathematical principle can been seen in Refs [24][25][26].…”