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本文在分析锤击力的波形基础上,提出将锤击力的付氏谱线图划分为准恒能量区和低能衰减区,并论述这两个区的特点,同时指出在低能衰减区对系统响应分析的条件,是低阶模态固有频率落在该区之內。
Based on the analysis of the waveform of the hammering force, this paper proposes to divide the spectrum of the hammering force spectrum into a quasi-constant energy region and a low-energy attenuation region. The characteristics of the two regions are also discussed. At the same time, The condition for the response analysis is that the natural frequencies of the lower order modes fall within this region.