上海交通大学学报

上海交通大学学报（自然版）

• 天文学、地球科学 • 上一篇    下一篇

易贡高速远程滑坡近程凌空飞行数值分析

周鑫，邢爱国，陈禄俊   

  1. (上海交通大学 土木工程系， 上海 200240)
  • 收稿日期:2009-07-05 修回日期:1900-01-01 出版日期:2010-06-30 发布日期:2010-06-30

Numerical Analysis on the Flying of Yigong HighSpeed and Long Runout Landslide at the ShortRange Stage

ZHOU Xin，XING Aiguo，CHEN Lujun   

  1. (Department of Civil Engineering，Shanghai Jiaotong University，Shanghai 200240， China)
  • Received:2009-07-05 Revised:1900-01-01 Online:2010-06-30 Published:2010-06-30

摘要： 研究了大型高速远程滑坡近程凌空飞行的空气动力学效应，建立了考虑地面效应的滑体运动微分方程组，并以易贡滑坡为例，使用数值分析方法研究高速滑体凌空飞行的运动规律.结果表明，高速滑体因空气动力学效应的影响而产生不断增大的水平推力和竖向抬升力，导致滑体的水平速度不断增大，但增幅不大，而竖向速度增幅减缓.因此，与忽略空气动力学效应的情况相比，高速滑体凌空飞行时间更长，飞行距离更远，更加符合滑坡的实际情况.

关键词: 高速滑坡, 近程凌空飞行, 数值分析, 空气动力学效应

Abstract: Many large highspeed and long runout landslides could fly in the air at the shortrange stage. The aerodynamic effect was studied for the case of highspeed sliding mass flying at the shortrange stage. The motion differential equations were educed in consideration of the ground effect. Taking the Yigong landslide in China as an example, this paper applied the numerical analysis method to study the flying law of highspeed sliding mass. The calculated results illustrate that, because of the aerodynamic effect to the sliding mass, the horizontal thrust force and vertical lift force both increase. The horizontal speed increases, but its amplitude is little. At the same time, the vertical speed tends to increase more slowly. Therefore, the flying time is longer and the distance is farther than those without consideration of the aerodynamic effect. The results are more reasonable by comparison with the field observation.

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