Improved Explicit Method for Structural Dynamics

An explicit method, which simultaneously has the most promising advantages of the explicit and implicit methods, is presented. It is shown that numerical properties of the proposed explicit method are exactly the same as those of the constant average acceleration method for linear elastic systems. However, for nonlinear systems, it has unconditional stability for an instantaneous stiffness softening system and conditional stability for an instantaneous stiffness hardening system. This conditional stability property is an improvement over that of the Newmark explicit method. Hence, with the proposed explicit method it is possible to have the most important property of unconditional stability for an implicit method. Conversely, this method can be implemented as simply as an explicit method, possessing the most important property of explicit implementation for an explicit method. Apparently, the integration of these 2 most important properties of explicit and implicit methods will allow the proposed explicit method to be competitive with other integration methods for structural dynamics.

  • Availability:
  • Supplemental Notes:
    • Abstract reprinted with permission from ASCE
  • Authors:
    • Chang, Shuenn-Yih
  • Publication Date: 2007-7

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01053706
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 17 2007 4:41PM