对PSDTOMA方法适用性的探究  

Exploration of the Applicability of PSDTOMAMethod

作　　者：刘文俊[1] 张昱[1] 朱彤[1] LIU Wenjun;ZHANG Yu;ZHU Tong(State Key Lab of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116000,Liaoning,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116000

出　　处：《噪声与振动控制》2020年第4期21-26,37,共7页Noise and Vibration Control

基　　金：国家自然科学基金资助项目(51578107,51778103);中央高校基本科研业务费资助项目(DUT18LAB07);汕头大学科研启动基金资助项目(NTF18012)。

摘　　要：基于传递率的运行模态分析(TOMA)是一种新颖的模态参数识别技术,其主要特点是能够在有色激励条件下实现运行模态分析。基于功率谱密度传递率的TOMA方法(PSDTOMA)是TOMA中最具实用性的一类方法,仅根据单一荷载条件下的响应信息即可识别模态参数。然而,PSDTOMA技术的普遍适用性一直没有得到系统研究。从理论出发,得到了一些关于PSDTOMA方法应用局限性的结论,数值和物理试验的结果随后验证了结论的正确性。Transmissibility-based Operational Modal Analysis(TOMA)is a novel modal parameter identification technology,which is characterized by its ability to realize operational modal analysis under colored excitation.Power Spectral Density TOMA(PSDTOMA)is the most practical method of TOMA technology.By this method,the modal parameters can be identified according to the response information under a single load condition only.However,the general applicability of PSDTOMA has not been systematically studied.Based on the theory,some conclusions about the limitations of PSDTOMA are obtained in this paper.The results of numerical and physical tests verify the conclusions.

关 键 词：振动与波 运行模态分析 功率谱密度传递率 风机叶片 适用性 

分 类 号：TB123[理学—工程力学] TK83[理学—力学]