广州新电视塔的动力特性有限元分析
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摘要
采用ANSYS软件对高610 m的广州新电视塔进行了动力特性分析,并在此基础上采用模态质量参与系数进行模态选择控制,研究了各阶模态振型对结构地震响应的贡献。研究结果表明这类非对称空间超高耸结构具有自振频率密集,桅杆的振型位移过大等特点;另外,对该超高耸结构进行抗震分析时,依振型贡献大小至少组合10个振型以上才能满足工程精度的要求。
In this paper the dynamic characteristics of the new Guangzhou TV tower,610 meters high,was analyzed by ANSYS,and based on it the mode selection was dynamited by calculating the modal mass participation ratio,The study showed that the natural frequencies of the super high unsymmetrical space structure were concentrated and the modal displacement of the mast was larger than that of the main tower.It was also found that at least 10 modes should be considered according to the modal mass participation ratio when the seismic response of the structure was investigated.
In this paper the dynamic characteristics of the new Guangzhou TV tower,610 meters high,was analyzed by ANSYS,and based on it the mode selection was dynamited by calculating the modal mass participation ratio,The study showed that the natural frequencies of the super high unsymmetrical space structure were concentrated and the modal displacement of the mast was larger than that of the main tower.It was also found that at least 10 modes should be considered according to the modal mass participation ratio when the seismic response of the structure was investigated.
引文
[1]陈波,瞿伟廉.高耸电视塔的动力特性及风振反应分析[J].武汉理工大学学报,2004,(2):23-26.
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[3]王元清,黄怡.超高层钢结构建筑动力特性与抗震性能的有限元分析[J].土木工程学报,2006,(5):65-71.
[4]卢文生,吕西林.模态静力非线性分析中模态选择的研究[J].地震工程与工程振动,2004,(6):32-38.
[2]王勖成,邵敏.有限单元法基本原理和数值方法[M].第2版.北京:清华大学出版社,1996.
[3]王元清,黄怡.超高层钢结构建筑动力特性与抗震性能的有限元分析[J].土木工程学报,2006,(5):65-71.
[4]卢文生,吕西林.模态静力非线性分析中模态选择的研究[J].地震工程与工程振动,2004,(6):32-38.
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