摘要
应用弹性波动理论,推导多源输入条件下的二维时域人工边界条件。首先基于二维波动方程建立两个波源时二维黏弹性人工边界的法向和切向方程,提出相应的数值模拟方法,并通过简单模型的波动问题进行验证。最后将多源输入条件下的二维黏弹性边界扩展至三维条件,模型验算结果表明多源输入条件下的黏弹性边界亦适用于三维模型。
Based on the theory of elastic wave motion, 2D visco-elastic artificial boundary condition for multiple source input is proposed in time domain. First the 2D visco-elastic artificial boundary equations along normal and tangent directions are developed by 2D wave motion equations. The numerical method of the proposed artificial boundary equations is also developed. Then the proposed 2D viscoelastic artificial boundary is validated by a simple model. Finally the 2D visco-elastic artificial boundary condition for multiple source input is applied in 3D model. The model test indicates that visco-elastic artificial boundary condition for multiple source input is also validate for 3D model.
出处
《土木工程学报》
EI
CSCD
北大核心
2015年第S1期147-151,共5页
China Civil Engineering Journal
基金
国家自然科学基金项目资助(51278045)
国家自然科学基金委员会-中国铁路总公司高速铁路基础研究联合基金资助(U1434210)
国家科技支撑计划课题资助(2015BAK19B02)
关键词
黏弹性人工边界
多源输入
地震动
波动
visco-elastic artificial boundary conditions
multiple source input
ground motion
wave motion
