Acta Mechanica Sinica

, Volume 8, Issue 1, pp 80–87 | Cite as

In-plane wave motion in finite element model

  • Liu Jingbo
  • Liao Zhenpeng


The analysis method of lattice dynamics in classical physics is extended to study the properties of in-plane wave motion in the hybrid-mass finite element model in this paper. The dispersion equations of P and SV waves in the discrete model are first obtained by means of separating the characteristic equation of the motion equation, and then used to analyse the properties of P-and SV-homogeneous, inhomogeneous waves and other types of motion in the model. The dispersion characters, cut-off frequencies of P and SV waves, the polarization drift and appendent anisotropic property of wave motion caused by the discretization are finally discussed.

Key Words

finite element discrete model in-plane wave motion lattice dynamics 


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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 1992

Authors and Affiliations

  • Liu Jingbo
    • 1
  • Liao Zhenpeng
    • 2
  1. 1.Harbin Institute of TechnologyHarbinChina
  2. 2.Institute of Engineering MechanicsSSBHarbinChina

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