FRF-based pole-zero method for finite element model updating

FRF-based pole-zero method for finite element model updating
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基于FRF的有限元模型更新的零极点方法

DOI:
10.1016/j.ymssp.2022.109206
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发表时间:
2022
影响因子:
8.4
通讯作者:
Hua-Jun Li
Hua-Jun Li
中科院分区:
工程技术1区
文献类型:
--
作者:
Shuai Cong;Sau-Lon James Hu;Hua-Jun Li

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通过有限元(FE)方法形成精确的动态模型总是要求系统参数精确。在已知系统频响函数的情况下,提出了一种基于频响函数的有限元模型修正方法,可同时修正系统的刚度、阻尼和质量参数。该方法不是直接使用测量的FRF进行模型更新,而是开发了一种有效的方案,首先提取与测量的FRF相关的极点和零点,然后推导出一种基于跨模型交叉模式(CMCM为基础)的更新方法,利用测量的极点和零点。通过计算机仿真和实验验证了该方法的有效性。
Forming accurate dynamic models through finite element (FE) methods always requires the system parameters to be precise. Given that a few frequency response functions (FRFs) of a dynamic system have been measured, an efficient FRF-based FE model updating method is developed to simultaneously update the system’s stiffness, damping and mass parameters. Instead of using the measured FRFs directly for model updating, the proposed method develops an efficient scheme to first extract the poles and zeros associated with a measured FRF, then derives a cross-model cross-mode-based (CMCM-based) updating method that utilized both measured poles and zeros. Two numerical examples, including computer simulation and lab experiment, are provided to demonstrate the excellent performance of the proposed method.
DOI: 10.1006/jsvi.2001.3697
发表时间: 2002-05
期刊: --
影响因子: --
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DOI: 10.1061/(asce)em.1943-7889.0001903
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期刊: Journal of Engineering Mechanics-asce
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