高技术通讯（英文版）2004，Vol.10Issue(1)：80-84,5.
Modal Parameter Identification of Offshore Platforms under Ambient Excitation
Modal Parameter Identification of Offshore Platforms under Ambient Excitation
摘要
Abstract
This paper intends to identify the modal parameters of an offshore platform under ambient excitation, and to compare the identified results with theoretical solutions. Using ambient sources of excitation to determine the modal characteristics of large civil engineering structures is desirable for several reasons. The forced vibration testing of such structures generally requires a large amount of specialized equipment and makes the tests quite expensive. Also, an automated health monitoring system for a large civil structure will most likely use ambient excitation. The Eigensystem Realization Algorithm (ERA) is applied in conjunctied acceleration information. Finally, offshore platform numerical model gets output response data under ambient excitation. Simulated data from numerical model of an offshore platform under ambient excitation is used for the identification of the system. According to the comparison results, the proposed method is shown to be effective for modal parameter identification under ambient excitation.关键词
offshore platform/modal parameter identification/eigensystem realization algorithm/ambient excitationKey words
offshore platform/modal parameter identification/eigensystem realization algorithm/ambient excitation分类
通用工业技术引用本文复制引用
Yang Hezhen(杨和振),Li Huajun..Modal Parameter Identification of Offshore Platforms under Ambient Excitation[J].高技术通讯（英文版）,2004,10(1):80-84,5.基金项目
Supported by the High Technology Research and Development Programme of China. （）
