Modal analysis and spectrum analysis are applied to research the dynamic characteristics, and the distribution laws of seismic displacements and stress of water retaining section are analyzed.
采用模态分析和反应谱分析的方法，研究坝段两种工况下的自振特性、地震动位移和地震动应力响应的分布规律。
The sound signal received and processed by the original sonar system is converted by comprehensive frequency spectrum and forms a digitized dynamic frequency-amplitude distribution curve.
原有声纳系统接收处理后的声音信号经过综合频谱转换后，形成数字化的动态频率-幅度分布曲线。
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