An especial structural model is obtained through corrected truncation errors of finite difference and the gray numerical arithmetic solving this kind model is given.
在数值求解过程中，对一维河流水污染的灰色模型求解过程中有限差分法的截断误差进行了修正，得到了具有一种特殊结构的数值模型，并给出了求解方法。
Considering the incompleteness of measured structural mode shapes, the practical complete modal space theory is used to eliminate the influence of modal truncation error.
考虑到所测的结构模态是不完备的，应用完备模态空间理论将未测的结构高阶模态用等效高阶模态来代替从而消除模态截断误差的影响。
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