Numerical Simulation of the Slit-Trap Dam Based on Fluid-Structure Interaction

• Published in: 东华大学学报（英文版） Vol. 33; no. 5; pp. 740 - 744
• Main Author: 李昆 陈晓清 陈剑刚 王飞 王小军
• Format: Journal Article
• Language: English
• Published: College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China 31.10.2016; Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Science and Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
• Subjects: fluid-structure interaction (FSI); debris flow; slit-trap dam; numerical simulation
• ISSN: 1672-5220

Debris flow can cause serious damage,and it is a part of the study of fluid-structure interaction（FSI）.FSI analysis was established on the interaction between unsteady flow and the slit-trap dam＇s vibration,with a coupling bench which can transfer fluid pressure and structure displacement.Debris flow can be seen as the Bingham body of incompressible.Based on ANSYS and CFX softwares,unidirectional and bidirectional coupling methods were used to study the transient interaction between debris flow and dam.The comparison between lateral fluid pressure states under different velocities and the equivalent stresses of the dam under different coupling conditions was made.The result shows that fluid-structure coupling becomes stronger with the increase of flow velocity.The maximum equivalent stress appears at the dam foundation,while the minimum equivalent stress appears at the dam abutment.With the increase of height,the fluid pressure decreases.The fluid pressure based on unidirectional FSI analysis is larger than that based on bidirectional FSI analysis and the maximum appears on the joint of the dam foundation and channel.The maximum equivalent stress of the dam based on the former is less than that based on the latter.