中文说明：模态处理相关程序，包括时域，频率，自普，互普，相干，频响，时频分析，HHt，随机减量法等等，很不错，可以借鉴
English Description：
Modal processing related procedures, including time domain, frequency, self-tuning, mutual common, coherence, frequency response, time-frequency analysis, HHT, random decrement method, etc., are very good, can be used for reference