An Equivalent Far-Field Dynamic-Artificial-Boundary Condition and its Accuracy Studies

Abstract:

In order to eliminate some problems of ordinary artificial boundary conditions in soil-structure dynamic interaction analysis at present, such as plenty amount of work required in establishing viscous boundary and viscous-elastic boundary and the expensive computing hours cost in traditional far-field artificial boundary condition, an equivalent far-field artificial boundary condition for dynamic analysis was proposed based on the wave propagating theory and the reflection and transmission principle of wave on the interface of medium by setting a fully-transmitting layer and lower the speed of wave considerably propagating within it. Then numerical simulations and studies of factors affecting accuracy for equivalent far-field artificial boundary condition were conducted with FEM. Researches show that equivalent far-field artificial boundary is as nearly accurate as viscous boundary; it can overcome the problems of viscous boundary, viscous-elastic boundary and traditional far-field boundary mentioned above; it is very convenient to operate and realize; it is very efficient and low-cost in workforce. The equivalent far-field boundary proposed can be applied to engineering dynamic field such as anti-seismic of structures, vibration and impact etc.

• Periodical: Advanced Materials Research (Volumes 243-249)
• Pages: 3795-3803
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.243-249.3795
• Online since: May 2011
• Authors: Yi Wu
• Keywords: Artificial Boundary, Dynamic, Interaction, Viscous, Viscous-Elastic

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DOI: 10.1016/s0165-1250(98)80018-7

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