Modal Parameter Identification of Free Spanning Submarine Pipeline Based on Ambient Excitation
Modal parameter identification is one of the key problems among structural health monitoring system. In order to extract exact modal parameters of free spanning pipeline (FSP) only from response data, an effective modal parameter identification approach based on ambient vibration is presented and validated by means of model experiment in the paper. A backward correlation-driven model (BCDM) is firstly built to describe the system dynamic behaviors. And then a direct criterion is proposed to identify system eigenvalues based on the magnitudes of the eigenvalues of a divergent system governed by BCDM. Finally, the dynamic model experiment of FSP is carried out to investigate the validity of the proposed method. The analytical results indicate that the proposed approach can identify modal parameters accurately under the ambient vibration because of the key advantage in discriminating the structure modes from spurious modes.
Modal parameters Free span Ambient excitation Model experiment Spurious modes
Jiashun Hu Xin Feng Jing Zhou Rubo Dong
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China
国际会议
南京
英文
791-796
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）