Suppressing local particle oscillations in the hamiltonian particle method for elasticity

Masahiro Kondo, Yukihito Suzuki, Seiichi Koshizuka

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The governing equation of elasticity is discretized into motion equations of the particles in a Hamiltonian system. A weighted least-square method is adopted to evaluate the Green-Lagrange strain. Using a symplectic scheme for the Hamiltonian system, we obtain the property of energy conservation in the discretized calculations. However, local particle oscillations occur, and they excessively decrease low frequency motion. In this study, we propose the use of an artificial potential force to suppress the local oscillations. The accuracy of the model with and without the inclusion of the artificial force is examined by analyzing a cantilever beam and wave propagation. With the inclusion of the artificial force, the local oscillations are reduced while energy conservation is maintained.

Original languageEnglish
Pages (from-to)1514-1528
Number of pages15
JournalInternational Journal for Numerical Methods in Engineering
Volume81
Issue number12
DOIs
Publication statusPublished - 2010 Mar 19
Externally publishedYes

Keywords

  • Elasticity
  • Hamiltonian
  • Local particle oscillations
  • Particle methods
  • Symplectic scheme

ASJC Scopus subject areas

  • Engineering(all)
  • Applied Mathematics
  • Numerical Analysis

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