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本文提出多自由度振动系统固有频率的一种近似解法。应用此法估算基频，在假设振型非常粗糙的情况下，仍能有较高的精度，同时亦能给出精确值的范围。
In this paper, an approximate solution to the natural frequency of a vibration system with multiple degrees of freedom is proposed. Estimating the fundamental frequency using this method can still give a high degree of accuracy while assuming a very rough shape and at the same time give a precise range of values.