摘要
本文基于有限元-边界元-无限边界元耦合的时域模型,提出了结合随机振动虚拟激励法的拱坝-地基动力相互作用分析模型,并用蒙特卡罗法对模型进行了验证。对某拱坝的计算结果表明,辐射阻尼对拱坝随机动力响应有显著影响,结果同时表明,地震动的随机性对于拱坝动力响应的影响明显,用有限的几条确定性地震动时程输入不能全面反映地震动的随机性。
A random vibration analysis method for studying the interaction between arch dam and foundation is proposed. The method combines the finite element-boundary element-infinite boundary element model in time domain with psudo-excitation algorithm. For verifying the validity of this method the Monte-Carlo method is applied to calculate the seismic response of an arch dam. The result demonstrates that the effect of radiation damping on seismic response of arch dam is remarkable. The random characteristics of earthquake are also proved to be important to the seismic response evaluation of arch dams.
出处
《水利学报》
EI
CSCD
北大核心
2005年第1期110-115,共6页
Journal of Hydraulic Engineering
关键词
随机振动
无限地基
辐射阻尼
虚拟激励法
拱坝-地基动力相互作用
random vibration
infinite foundation
radiation damping
pseudo-excitation algorithm
interaction between dam and foundation
