摘要
利用刚性矩形基础动力阻抗矩阵的数值解答,在频域内分析了三向地震模拟台基础在简谐外荷载作用下的动力响应。论文同时给出了一种一般集中参数模型,以改善传统动力设计方法所采用的质量-弹簧-阻尼模型动力阻抗在整个频段上都是常数的不合理性。由于基础动力阻抗矩阵是外荷载激励频率的函数,采用更多参数的一般集中参数模型与数值解答吻合精度更高。计算结果表明,论文提出的一般集中参数模型有望改进基础动力响应分析。
The dynamic response of 3-dimensional shaking-table foundation to steady-state forces is analyzed based on the numerical simulation of the rigid rectangular foundation. A general lumped-parameter model is presented to correct the irrationality of traditional dynamic foundation design method, in which the spring stiffness and damping coefficients of the mass-spring-damping model are constant in the whole frequency band. The general lumped parameter model introduced in this paper offers more accurate results than the traditional method for dynamic stiffness matrix of foundation. It is expected that the general lumped parameter model will improve the dynamic foundation design.
出处
《工程力学》
EI
CSCD
北大核心
2003年第4期122-127,共6页
Engineering Mechanics
基金
地震科学联合基金资助项目(602009)
中国地震局"十五"重点项目子课题(2-15)
关键词
基础动力响应
动力阻抗矩阵
一般集中参数模型
频域
Damping
Dynamic response
Springs (components)
Stiffness matrix
Test facilities
Three dimensional
