Non-smooth DEMにおける粘着力のモデルおよびパラメータ同定法に関する研究

抄録

This paper describes study on numerical analysis method of contact behavior of particles constituting sand gravel. Conventionally, Distinct Element Method (DEM) is used for analyzing particles such as sand. However, the DEM has a problem that the time step has significant influence on result of numerical analysis since the contact force depends on the overlap between particles. In this study, Non-smooth DEM is focused on, which can solve the aforementioned problem in conventional DEM. However, in Non-smooth DEM, it is not well-established to formulate the adhesive force cause by water included in sand gravel and to identify the parameter associate with the adhesive force. In this study, a method for incorporating adhesive force in Non-smooth DEM and identify the associated parameters are proposed. Identification experiment is performed and parameters associated with adhesive force are determined. The proposed method are verified qualitatively by numerical analysis.