タケダ　マサカズ   Masakazu Takeda   武田　真和    所属   追手門学院大学  理工学部 機械工学科    職種   講師
発表年月日	2020/08/25
発表テーマ	Non-smooth DEMにおいて発生する貫入挙動の低減手法に関する研究
会議名	Dynamics & Design Conference
主催者	一般社団法人 日本機械学会
発表形式	その他
開催期間	2020/08/25～2020/08/25
発表者・共同発表者	松本 栞理,菅原 佳城,武田 真和
概要	Non-smooth DEM (N-DEM) is a particle method used to analyze systems with various particle behaviors. It is a method that uses the contact law, and it is possible to analyze with a larger step width than the conventional DEM. However, it has been confirmed that penetrating behavior occurs in the analysis result by N-DEM when the step width is too large. N-DEM does not generate a force that reduces the penetration amount, which affects the analysis accuracy. Therefore, the purpose of this research is to reduce penetrating behavior by introducing the DEM concept, consepuently to analyze the particle behavior more accurately. Since DEM calculates the repulsive force from the overlap amount and the overlap rate, it is possible to reduce the penetration. In addition, the proposed method, which combines N-DEM and DEM, can realize more accurate behavior of particles in a shorter analysis time. In this paper, the results of the proposed method are shown for the penetration caused by the collision of two particles. DEM is only applied in the normal direction when the normal penetration is large in the collision of two particles. And the energy was evaluated for the analysis result by the proposed method.
researchmap用URL	https://www.jstage.jst.go.jp/article/jsmedmc/2020/0/2020_511/_pdf