岩土力学2011，Vol.32Issue(11)：3508-3514,7.
一维问题的等效远置动力人工边界条件
An equivalent far-field artificial dynamic-boundary condition for one-dimensional problem
吴艺1
作者信息
- 1. 西南科技大学 土木工程与建筑学院,四川 绵阳 621010
- 折叠
摘要
Abstract
In the analysis of dynamic soil-structure interaction, viscous artificial boundary condition, viscoelastic artificial boundary condition and far-field artificial boundary are often used to simulate the scattered wave propagating in infinite base. Viscous artificial boundary condition and viscoelastic artificial boundary condition have many advantages such as low computing cost and good accuracy; but amount of labor work of applying boundary elements is heavy; although far-field boundary saves the work of applying boundary elements and can provide highly accurate results; it requires expensive computing cost. In order to address the problem of high labor cost in viscous artificial boundary condition and viscoelastic artificial boundary condition and high computing cost in far-field boundary, an equivalent far-field artificial boundary condition is 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 lowering the speed of wave considerably propagating within it. Then numerical simulations and studies of factors affecting accuracy for equivalent far-field artificial boundary condition are conducted with FEM. Researches show that equivalent far-field artificial boundary can be set up only by setting rational mass and Young's modulus parameters in transmitting boundary layer to simulate reflected wave propagating in infinite base. Equivalent far-field artificial boundary has many advantages such as good accuracy and efficiency and saving the labor work of applying boundary elements; so it can be applied to the analysis of dynamic soil-structure interaction.关键词
动力/相互作用/人工边界/黏性/黏弹性/远置Key words
dynamic/interaction/artificial boundary/viscosity/viscoelasticity/far-field分类
建筑与水利引用本文复制引用
吴艺..一维问题的等效远置动力人工边界条件[J].岩土力学,2011,32(11):3508-3514,7.
