摘要
对于防治工程的设计,泥石流冲击力是一个很重要的参数,其冲击力的大小要准确地进行估计是很困难的,并且由于泥石流的破坏性很强,很难在野外进行冲击力的测量。为了减小模型尺度带来的影响,利用大型水槽进行泥石流冲击力实验,并对得到的冲击力信号进行小波降噪处理。通过比较降噪后重构的信号及降噪后的信号发现,降噪后的泥石流冲击力信号可作为液相浆体的冲击力过程线。对采集到的泥石流冲击力数据分析后发现,泥石流液相浆体的冲击力计算公式p=Kρfv2中的系数K接近于0.5。
For the prevention and control of engineering design, the magnitude of debris flow impact force is a very important parameter and is difficult to be estimated and measured in the field. To reduce the influence of model scale, debris flow impact force experiment was carried out by large flume and the wavelet analysis was used to de-noise the debris flow impact signal. The results showed that the de-noised debris flow impact signal could be impact pressure of liquid phase slurry by comparing the reconstructed signal with de-noised signal. The analysis of debris flow impact pressure experiment data showed that the coefficient approaches 0.5 in the debris flow impact pressure formulap = Kρfv^2.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2013年第1期8-13,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
国家重点基础研究发展计划资助项目(2011CB409902)
中国科学院重点部署项目(KZZD-EW-05-01)
中国科学院水利部成都山地灾害与环境研究所青年百人团队资助项目(110900K235)
关键词
泥石流
冲击力
小波分析
信号降噪
debris flow
impact pressure
wavelet analysis
signal de-noising
