关于弹性地基上圆环形薄板振动问题的解答（续一）

Solutions to the Vibration of Ring-Shaped Thin Plate on the Elastic Base(Continuation 1)

对弹性地基上圆环形薄板的振动问题进行了分析和求解，给出了固有频率的计算公式和必要的数据，考虑了内周边固支外周边自由等四种边界条件，以及不同外径与内径比值的情况．

The vibration problems of ring-shaped thin plate on an elastic base are analyzed and solved in consideration of four groups of boundary conditions and different ratio of outer-inner radius,and the formula as well as the needed data for calculating the natural frequency are also presented.