泥石流运动力学研究现状及趋势

对泥石流力学模型转化机理、动力特性及动力学试验进行综合分析及评价。分析表明:各种力学模型的适用条件有一定的局限性;动力特性中流速、流量、冲击力及磨蚀力的计算大多属于经验公式,这些公式的适用范围只限于某一地区或某一类型的泥石流,地区性很强;泥石流动力试验设备的未能及时采集有效的动力瞬时数据。针对上述问题,提出发展思路:研发及创新泥石流动力试验设备,通过量测泥石流瞬时流速,利用频谱分析,建立泥石流流速谱,冲击力谱等重要运动参数,从而揭示泥石流运动机理。

Research Status and Trend about Dynamics of Debris Flow

Transforming mechanism of mechanical model,dynamic behavior study,dynamics test are analyzed and evaluated. The analysis shows that there are some limitations about the application of all kinds of mechanical model. The application range of the empirical formulas about velocity,flow,impact force,abrasion force is narrow and regional. The test equipment can not acquire instantaneous dynamic data of debris flow. In view of these problems,the paper proposes research ideas to solve these problems. The velocity spectrum and impact force spectrum are proposed with the spectrum analysis and measuring effective instantaneous velocity of debris flow with researching and developing test equipments. It is important to learn motion mechanism of debris flow.