PRELIMINARY RESEARCH OF LONG PERIOD FLUCTUATIONS AT LOW FREQUENCIES BASED ON ULTRA-WIDEBAND SEISMOMETER
The seismic data recorded by ultra-wideband seismometer JCZ-1T of Chengdu Earthquake Monitoring Center Station were studied,and it was found that there were low-frequency and long-pe-riod fluctuation in the data.The comparative analysis between the sluice experiment of hydropower station and the real-time waveform in the period of low-frequency long-period fluctuation proves that there is a direct correlation between the long-period fluctuation and the flushing operation of Hydro-power Station.,and it is obtained from the experiment that the two important factors affecting the shape change of low-frequency long-period waveform are the sluice time and the sluice scale respec-tively.According to the experimental results,it is considered that the low-frequency and long-period fluctuation reflects the"oscillation"process in which the water level and water flow rate change sharply and gradually return to calm during sluice.
Ultra wideband seismometerLow frequency long period fluctuationsBackground noiseHydropower station flushing gate
万方数据
维普
