|
|||||
|
|
| 基于随机减量的运行模态频域分析方法 | |
| 引用本文： | 黄琴,王彤,张海黎.基于随机减量的运行模态频域分析方法[J].南京航空航天大学学报,2011,43(6). |
| 作者姓名： | 黄琴 王彤 张海黎 |
| 作者单位： | 1. 南京航空航天大学无人机研究院,南京,210016 2. 南京航空航天大学航空宇航学院,南京,210016 3. 驻南京地区军事代表室,南京,210007 |
| 摘 要： | 以高层建筑、大跨桥梁等难以进行人工激励的大型复杂结构为对象,提出并实现了一种基于随机减量技术和复模态指示因子函数法的新型频域运行状态模态参数识别方法.由随机运行响应估计随机减量函数,然后通过时频域变换得到频域的半功率谱密度函数,并用复模态指示因子函数法从半功率谱密度函数中识别结构模态参数.最后对1个三维空间结构模型进行算法验证,得到相应的各阶模态参数,证明了将随机减量技术和复模态指示因子函数法相结合的方法识别大型结构模态参数的有效性和合理性. |
| 关 键 词： | 运行模态分析 随机减量技术 复模态指示因子 半功率谱密度函数 |
Operational Modal Analysis Method in Frequency Domain Based on Random Decrement |
|
| Huang Qin , Wang Tong , Zhang Haili.Operational Modal Analysis Method in Frequency Domain Based on Random Decrement[J].Journal of Nanjing University of Aeronautics & Astronautics,2011,43(6). | |
| Authors: | Huang Qin Wang Tong Zhang Haili |
| Institution: | Huang Qin1,Wang Tong2,Zhang Haili3(1.Research Institute of Unmanned Aircraft,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China,2.College of Aerospace Engineering,Nanjing University of Aeronautics &Astronautics,3.Military Representative Office of Nanjing,210007,China) |
| Abstract: | A new method based on complex mode indicator function and random decrement technique for operational modal analysis in frequency domain is proposed with a focus on the complex large-scale structures such as high buildings and long-span bridges,which are difficult to be excited artificially.The time-domain random decrement functions are transformed to frequency-domain half power spectral density functions by the Fourier transformation,and then the modal parameters including modal frequencies,damping ratios a... |
| Keywords: | operational modal analysis random decrement technique complex mode indicator half power spectral density function |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |