| 密集频率群结构在振型分解反应谱法中的取舍 |
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| 引用本文： | 王霄. 密集频率群结构在振型分解反应谱法中的取舍[J]. 水利科技与经济, 2013, 0(10): 24-26 |
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| 作者姓名： | 王霄 |
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| 作者单位： | 四川省水利水电勘测设计研究院,成都610072 |
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| 摘 要： | 针对模态密集系统作模态截断时系统主模态数该取多少,采用振型参与质量的方法进行分析。并以某电站的动力响应为算例,判断振型参与质量与所取主模态数的关系。结果表明,电站的振型达到10阶后,振型参与质量系数达到90%,从而保证计算的准确性,对于密集频率群结构此种模态截断方法具有一定的指导意义。
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| 关 键 词： | 水工结构 地震响应 反应谱 模态截断 |
The Adoption of Modal Concentration System in Mode- Superposition Response Spectrum Method |
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| WANG Xiao. The Adoption of Modal Concentration System in Mode- Superposition Response Spectrum Method[J]. Water Conservancy Science and Technology and Economy, 2013, 0(10): 24-26 |
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| Authors: | WANG Xiao |
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| Affiliation: | WANG Xiao (Sichuan Water Resources ＆ Hydroelectric Investigation And Design Institute, Chengdu 610072, China) |
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| Abstract: | The method of mode participation mass is adopted to analyse the mode number when modes abscission is done in modal concentration system. Dynamic response of a hydroplant is calculated as an example in order to define the relation of mode participation mass and mode number. The result indicates when the mode number is considered more than 10,the ratio of mode participation mass can exceed 90 percent so that the exactness is assured. The method of modes abscission has something instructional for modal concentration structure. |
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| Keywords: | hydraulic structure seismic response response spectrum modes abscission |
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