湖南大学学报（自然科学版）2016，Vol.43Issue(2)：77-84,8.
基于结构水下冲击响应识别结构模态参数
Identification of Structural Modal Parameters Based on Underwater Shock Response
摘要
Abstract
Based on the dynamic equations of underwater structures,the modal parameters under shock were identified with Hilbert-Huang Transform (HHT).The method combines the advantages of HHT for nonlinear and non-stationary signal,and the band-pass filters designed can select the cut-off frequency au-tomatically,which can accurately obtain each modal response.Then,it can identify the structural natural frequencies and dampings with only one measured data in proper place.Finally,the accuracy and the valid-ity of the method were verified on the basis of numerical simulation experiments,which identify the struc-tural natural frequencies and dampings with one node response.It offers a practical method for the struc-tural identification of modal parameters of underwater shock environment.关键词
水下冲击/模态参数识别/Hilbert-Huang 变换/带通滤波Key words
underwater shock/identification of modal parameters/Hilbert-Huang Transform/band-pass filtering分类
建筑与水利引用本文复制引用
夏茂龙,于大鹏,黎胜..基于结构水下冲击响应识别结构模态参数[J].湖南大学学报（自然科学版）,2016,43(2):77-84,8.基金项目
国家自然科学基金资助项目（51109219），National Natural Science Foundation of China（51109219）；中央高校基本科研业务费专项资金资助项目（DUT13ZD（G）03） （）
