By using separation of variables and double Fourier series, we obtain a solution to the initial-boundary value problem of the forced vibration of this rectangular membrane.
利用分离变量法和二重傅里叶级数的方法，得到了矩形膜的受迫振动初边值问题的解。
The influence of double layer for scalar potential, the double layer universal solutions of scalar potential and the only theorem of boundary value problem are discussed.
论述了偶层对标势的影响及有偶层存在时标势的普遍解和边值问题的唯一性定理。
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