Acta Mechanica Sinica

, Volume 3, Issue 3, pp 239–250 | Cite as

Extraction-condensation method for solving large sets of equations in FE analysis

  • Liang Naigang
  • Chen Qiye
Article
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Abstract

In static and dynamic analysis of a large complex structure, one may merely be interested in the stresses and displacements at some important locations. A new solution technique for structural analysis with FEM is proposed in this paper by which those important unknowns are separated from the rest. In static analysis the important unknows can be found directly. In dynamic analysis all mass and exciting forces can be condensed onto a small number of predetermined points in order to make the dynamic analysis much simplified. A large scale problem can be solved with a small capacity computer quickly.

Key Words

FEM extraction-condensation static and dynamic analysis dominant freedom degrees condensed motion equations formula for transferring stiffness mass and exciting forces 
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References

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Copyright information

© Chinese Society of Theoretical and Applied Mechanics 1987

Authors and Affiliations

  • Liang Naigang
    • 1
  • Chen Qiye
    • 1
  1. 1.Institute of MechanicsAcademia SinicaTaiwan

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