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Date of Publication:2013-01-01

Journal:工程力学

Volume:30

Issue:3

Page Number:98-105

ISSN No.:1000-4750

Abstract:The Damping Solvent Extraction Method (DSEM), which considers the
   radiation damping by introducing artificial high damping to attenuate
   wave motion and then extracting its influence through shifting the
   frequency axis, can simulate the dynamic properties of inhomogeneous
   infinite medium and make the coupling of a time-frequency domain
   eliminated, so the research on generalizing the method to engineering
   application has practical value. A time-domain model based on User
   Programmable Features (UPFs) for implementing the DSEM within commercial
   finite element software ANSYS is presented. The structure and unbounded
   foundation are modeled as two separate substructures, and a coupling
   element is formulated for considering the effect of high damping on the
   structure and a practical external-interface is developed with ANSYS for
   evaluating interaction forces on the structure-foundation interface.
   Numerical examples show the reliability and good validity of the
   presented model. Further more, by taking the advantage of the rich
   element library and powerful numerical solvers in commercial finite
   element software, the presented model can be used for solving
   sophisticated dynamic structure-soil interaction problems.

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