Based on the generalized perturbation formula, the detailed formula for Nodal Green's Function Method (NGFM) is derived.

本文从微扰计算的普遍公式出发，给出了节块格林函数法(NGFM)下微扰计算的具体公式。

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It is proved via the verification calculation that the HOH result from NGFM is consistent with that from the fine mesh difference method, but with much less computation time.

经验算，NGFM下高阶谐波计算取得与细网差分法下一致的结果，但计算时间大大缩短。

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In spatial calculation, the NGFM is used to get the distribution of shape function, and it's spatial mesh can be nearly 20 times larger than that of Diffinite Differential Method.

在必要的空间计算中，该方法又利用了格林函数节块法的原理求解形状函数的空间分布，使空间网格距可以达到有限差分法的近20倍。

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