自由界面模态综合方法在框架结构上的应用研究  

The Applied Research of The Free Interface Modal Synthesis Method in Frame Structure

作　　者：徐超[1] 

机构地区：[1]福建省建筑科学研究院福建省绿色建筑技术重点实验室,福建福州350025

出　　处：《福建建设科技》2015年第6期19-23,18,共6页Fujian Construction Science & Technology

摘　　要：本文首先介绍了自由界面模态综合方法的主要思路和理论基础,再应用该方法在框架结构中进行研究。针对自由界面模态综合方法提出相应的模态截取准则,研究子结构主模态截断阶数对模态综合计算的精度影响,以保证良好的综合精度。研究结果表明相较于整体计算结果,运用了自由截面模态综合方法的频率误差都在5%以下,MAC全在0.95以上,其综合精度满足工程要求,从而验证了自由界面模态综合方法在框架结构上应用的可行性,以及提出的模态截取准则的正确性。The free interface modal synthesis method is basically introduced in this paper. And then the free interface modal synthesis method is introduced to frame structure for further research. In order to ensure a comprehensive precision for the application, appropriate modal intercept standard is proposed for modal synthesis method. Compared with the calculation results of the traditional methods, the rela- tive errors of the frequencies by using the free interface modal synthesis are all less than 0.5% and MAC values are all above 0.95, meet the engineering requirements well. The result verifies that the proposed free interface modal synthesis method can be successfully used in frame structure and the proposed modal intercept standard is effective.

关 键 词：自由界面模态综合 模态综合 模态截取准则 

分 类 号：TU323.5[建筑科学—结构工程]