中文说明：%下面的代码是在2007年为一个类项目编写的。它是基于
English Description：
% The following code was made in 2007 for a class project. It was based on % a letter written by J. P. Arenas for the editor of Journal of Sound and % Vibration (2003), which has the title: "On the vibration analysis of % rectangular clamped plates using the virtual work principle." % % Before using the code for calculating plate transverse displacement, % there are several basic assumptions that should be considered: % 1. The plate is rectangular, thin, and perfectly flat. % 2. The plate is isotropic and undamped. % 3. The plate is subjected to a