DEVELOPMENT OF IMPULSE-BASED DEM WITH VARIABLE TEMPORAL RESOLUTION

• SHIOIRI Kazuki

  アシザワ・ファインテック株式会社

• MITSUME Naoto

  筑波大学　システム情報系

• ASAI Mitsuteru

  九州大学大学院　工学研究院社会基盤部門

Bibliographic Information

Other Title

• 時間解像度が可変な力積型個別要素法の開発

Abstract

The distinct element method (DEM) is used for analyzing interaction of colliding particles in various fields. The conventional DEM has an upper limit of time step mainly because of linear oscillatory dynamics if it has high spring stiffness. Therefore it requires greater computational resources. In addition, it has difficulties in deciding the parameters of particles simulating collision of hard materials. In this study we propose an impulse-based DEM with variable temporal resolution for analyzing industrial machines with dynamic hard spheres. This model has less parameters of particles and larger upper limit of the time step than the conventional model. We verify qualitative accuracy of our proposed model by observing behavior of particles in the ball mill, and compare results obtained by the proposed model with experimental and results of conventional model.

Journal

• Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))

  Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM)) 76 (2), I_119-I_129, 2020

  Japan Society of Civil Engineers

Keywords

• <i>Discrete Element Method</i>
• <i>rigid body</i>
• <i>impulse</i>
• <i>temporal resolution</i>
• <i>deciding parameters</i>

Details

• CRID: 1390568456357748864
• NII Article ID: 130007980120
• DOI: 10.2208/jscejam.76.2_i_119
• ISSN: 21854661
• Web Site: https://www.jstage.jst.go.jp/article/jscejam/76/2/76_I_119/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed