The article gives the results of rectangular moderate - thick plates under various length - width ratios and various thickness - width ratios and the results are compared with corresponding series solution about thin plates . at last the article gives a rough limitation between thin and thick plates according to the absolute values of their relative er - 本文最后計算了彈性地基上不同長寬比的中厚板在不同的厚寬比情況下的中點撓度值,并與薄板理論的級數(shù)精確解答進行比較,根據(jù)其相對的誤差絕對值,對彈性地基上薄板和中厚板嘗試進行了大致的界定。