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个人信息Personal Information
教授
博士生导师
硕士生导师
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：力学与航空航天学院
学科：工程力学. 固体力学. 船舶与海洋结构物设计制造. 计算力学. 航空航天力学与工程
办公地点：综合实验1号楼（海宇楼）605
联系方式：Email: lxyuhua@dlut.edu.cn 565598@qq.com
电子邮箱：lxyuhua@dlut.edu.cn
Single point mooring system modal parameter identification based on empirical mode decomposition and time-varying autoregressive model
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论文类型：期刊论文
发表时间：2015-10-01
发表刊物：APPLIED OCEAN RESEARCH
收录刊物：SCIE、EI、Scopus
卷号：53
页面范围：250-256
ISSN号：0141-1187
关键字：Modal parameter; Time-varying system; Single point mooring; Empirical mode decomposition; Time-varying autoregressive
摘要：A method based on empirical mode decomposition (EMD) and time-varying autoregressive (WAR) model is proposed here to identify the modal parameters of time-varying systems, such as the Floating Production Storage and Offloading (FPSO) single point mooring system. For the EMD-TVAR method, the original signal is decomposed into a finite number of 'intrinsic mode functions' (IMFs) by the EMD. Each IMF can be represented as a WAR model. Then, the time-varying modal parameters i.e., instantaneous frequency(IF) and modal dumping, can be obtained by the basis functions expansion method. The proposed EMD-TVAR method has good results in two experiments compared with the Huang-Hilbert transformation and Short Time Fourier Transform method, and it has been used to analysis the modal parameters of FPSO single point mooring system successfully. The system's time-varying characteristic and its frequency distribution can be known from the modal analysis results. (C) 2015 Elsevier Ltd. All rights reserved.