【摘要】 针对厂房-基础-地基动力相互作用的时域数值分析,建立有效合理的地基无限域计算模型。采用基于加速度脉冲响应函数的高性能比例边界有限元,结合真实的地基开挖参数,针对地基无限域相互作用力的求解进行了分析,并对比粘弹性人工边界模型与核电规范模型,研究了高性能比例边界有限元模型的工程适用性。结果显示该模型在保证精度的前提下,有效降低了卷积运算量,数值稳定性好,对基坑开挖的参数敏感性高,具有良好的工程实用前景。更多还原

【Abstract】 An effective and reasonable computational model of infinite domain foundation is established for numerical analysis of the plant-base-foundation dynamic interaction in time domain.The high performance scaled boundary finite element method based on acceleration impulse response function is adopted to analyze infinite foundation interaction by combining with the real parameters of foundation excavation.And then the engineering usability of the model is studied by comparing with the viscoelastic boundary model and the ASCE model.The results show that on the premise of ensuring high accuracy,the model reduces the convolution calculation and provides a good numerical stability with high sensitivity to the parameters of excavation pit,which has good engineering practical prospect.更多还原