基于环境激励单层柱面网壳结构的模态分析陈洁崔杰王武斌彭.PDF

Hans Journal of Civil Engineering 土木工程, 2017, 6(3), 288-294 Published Online May 2017 in Hans. /journal/hjce /10.12677/hjce.2017.63033 Modal Analysis of the Single Cylindrical Reticulated Shell Based on Ambient Excitation Method Jie Chen, Jie Cui, Wubin Wang, Kangyou Peng, Beidou Ding Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou Jiangsu th nd th Received: May 4 , 2017; accepted: May 22 , 2017; published: May 26 , 2017 Abstract Because of the large number of bars, the frequencies and the mode shapes of the shell structure are very dense, and it is difficult to obtain the modal parameters due to the small energy based on hammer excitation. The ambient excitation method does not need special excitation equipment, only depends on the micro tremors, and the frequency band of signal coverage is wide. In this pa- per, based on the ambient excitation method, the modal analysis of single-layer cylindrical reticu- lated shell structure is carried out and compared with the finite element modal analysis. The ef- fectiveness of the modal analysis based on ambient excitation is verified. Keywords Ambient Excitation, Single Cylindrical Reticulated Shell, Modal Analysis 基于环境激励单层柱面网壳结构的模态分析 陈 洁，崔 杰，王武斌，彭康佑，丁北斗 中国矿业土木学院江苏省土木工程环境灾变与结构可靠性高校重点实验室，江苏 徐州 收稿日期：2017年5月4 日；录用日期：2017年5月22 日；发布日期：2017年5月26 日 摘 要 网壳结构因其杆件众多，其动力学参数频率和振型比较密集，采用力锤激振方法因其能量过小不易获取 文章引用: 陈洁, 崔杰, 王武斌, 彭康佑, 丁北斗. 基于环境激励单层柱面网壳结构的模态分析[J]. 土木工程, 2017, 6(3): 288-294. /10.12677/hjce.2017.63033 陈洁 等 其模态参数。环境激励法不需要特别的激振设备，仅仅依赖于地脉动，信号覆盖的频带较宽, 因而能够有 效地识别出了复杂结构模态参数