摘要
古塔的动力特性是评价结构抗震性能和损伤状态的重要指标。本文首先根据测绘资料采用有限元软件ANSYS建立秦峰塔的初始有限元模型,然后利用现场环境振动实测数据修正所建立的有限元模型并进行模态分析。结果表明:修正后的有限元模型模态分析计算结果和现场测试数据相比,误差较小,从而说明文中所建立的有限元模型是比较可靠的,可以为古塔的后续动力响应分析提供理论分析模型。
The dynamic characteristic is an important index to evaluate the seismic property and damage state of ancient pagodas. First, the finite element （FE） model for Qinfeng pagoda is developed based on the test documents using the large FE software ANSYS. Then, the model updating of Qinfeng pagoda is carried out by the dynamical properties of the pagoda measured from the field test and modal analysis is made using the developed FE model. It is shown that： the results of dynamical characteristic calculated by the FE model developed from the test documents are accordance with those measured from the field test. Therefore, it can be concluded that the FE model is valid and can be taken as the foundation for the following dynamic response study.
出处
《工程抗震与加固改造》
2007年第6期50-55,共6页
Earthquake Resistant Engineering and Retrofitting
关键词
秦峰塔
动力特性
环境激励
振动测试
有限元模型
模态分析
Qinfeng pagoda
dynamic characteristic
ambient excitation
dynamic measurement
finite element model
modal analysis
