Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Comparison of GPU-Based Numerous Particles Simulation and Experiment

GPU 기반 대량입자 거동 시뮬레이션과 실험비교

  • Park, Sang Wook (Graduate School of Mechatronics Engineering, Pukyong Nat'l Univ.) ;
  • Jun, Chul Woong (Graduate School of Mechatronics Engineering, Pukyong Nat'l Univ.) ;
  • Sohn, Jeong Hyun (Department of Mechanical and Automotive Engineering, Pukyong Nat'l Univ.) ;
  • Lee, Jae Wook (Ultimate Manufacturing Technology R&BD Group, Korea Institute of Industrial Technology)
  • 박상욱 (부경대학교 대학원 메카트로닉스공학과) ;
  • 전철웅 (부경대학교 대학원 메카트로닉스공학과) ;
  • 손정현 (부경대학교 기계자동차공학과) ;
  • 이재욱 (한국생산기술연구원)
  • Received : 2014.03.08
  • Accepted : 2014.05.24
  • Published : 2014.07.01
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Abstract

The dynamic behavior of numerous grains interacting with each other can be easily observed. In this study, this dynamic behavior was analyzed based on the contact between numerous grains. The discrete element method was used for analyzing the dynamic behavior of each particle and the neighboring-cell algorithm was employed for detecting their contact. The Hertzian and tangential sliding friction contact models were used for calculating the contact force acting between the particles. A GPU-based parallel program was developed for conducting the computer simulation and calculating the numerous contacts. The dam break experiment was performed to verify the simulation results. The reliability of the program was verified by comparing the results of the simulation with those of the experiment.

우리 주변에는 수많은 알갱이들이 서로 상호작용하면서 운동하는 모습을 주로 볼 수 있다. 본 연구에서는 수많은 알갱이들의 접촉에 따른 동적 거동을 분석하였다. 접촉에 의한 각 요소의 거동을 해석하기 위해 이산 요소법(Discrete element method)을 사용하였다. 접촉 관계에 있어서 접촉 판별을 위해 Neighboring-Cell 알고리즘을 사용하였고, 접촉력 계산에 Hertzian contact model과 Tangential sliding friction contact 모델을 사용하였다. 수많은 알갱이의 접촉해석을 위해 GPU 기반의 병렬 프로그램을 구성하였다. 해석을 검증하기 위해서 댐 붕괴 실험을 수행하였다. 거동 종료시점에 입자들의 쌓인 형상을 시뮬레이션 결과와 비교하여 해석 프로그램의 신뢰성을 검증하였다.

Keywords

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