噪声与振动控制2017，Vol.37Issue(3)：14-18,36,6.DOI:10.3969/j.issn.1006-1355.2017.03.003
环境激励下脉冲响应函数与相关函数的关系
Discussion on the Relation between Correlation Functions and Impulse Response Functions under Ambient Excitation
摘要
Abstract
Impulse response functions (IRFs) contain all the dynamic characteristics of structures. Extraction of IRFs or frequency response functions (FRF) is the premise for obtaining the dynamic characteristics of the structure, the structure identification, the health monitoring, and the precise control of the structure. However, in some real operation conditions, the excitations cannot be measured and the IRFs cannot be acquired directly. In this paper, the relation between the correlation functions and IRFs is meticulously deduced through natural excitation technique (NExT). Furthermore, considering that the structure is a real-modal system, the intensity of each excitation is identified when the structure is discrete and the mass matrix is diagonal. Using the identified modal parameters and the intensity of the excitations, the IRFs of the structure are reconstructed by correlation functions. A simulation is employed to validate the reliability of the relation derived between the correlation functions and the IRFs.关键词
振动与波/工况模态分析/环境激励/相关函数/脉冲响应函数Key words
vibration and wave/operational modal analysis (OMA)/ambient excitation/correlation function/impulse response function (IRF)分类
数理科学引用本文复制引用
于亮亮,宋汉文..环境激励下脉冲响应函数与相关函数的关系[J].噪声与振动控制,2017,37(3):14-18,36,6.基金项目
国家自然科学基金资助项目(11272235) （11272235）
