Abstract： A physical experimental model in laboratory was established for debris flow, and 85 groups’ conditions were done considering the compounding of five slurry viscosities, five solid phase ratios and four grain diameters. The impacting force of debris flow under the experimental conditions were denoised and time-frequency disposed by wavelet method, then the impacting signals were broken down to nine frequency range (0~1.958 Hz, 1.958~3.906 Hz, 3.906~7.812 Hz, 7.812~15.625 Hz, 15.625~31.25 Hz, 31.25~62.5 Hz, 62.5~125 Hz, 125~250 Hz, 250~500 Hz) and the energy distribution characteristics of each frequency range were calculated. The results show that, firstly, general impacting energy increases with the increase of slurry viscosity, solid phase ratio and grain diameter. Secondly, energy distributing law of debris flow in approximate parameter (a8) frequency range is the same with general energy distribution, and more than 96 percentages of the energy colleted at 0~1.958Hz frequency range. The result is positive in the studies on dynamical features of debris flow.
何晓英，陈洪凯，唐红梅. 泥石流浆体与固体颗粒冲击信号能量分布研究[J]. 振动与冲击, 2016, 35(6): 64-69.
HE Xiao-ying，CHEN Hong-kai，TANG Hong-mei. Experimental study on the energy distribution characteristics of debris flow impacting signals considering the slurry viscosity and particle. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(6): 64-69.
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