基于频响函数辨识鼓筒-轮盘结合部连接参数的选点原则

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (5) : 75-81.

论文

王洪玉1，秦朝烨1，褚福磊1，刘彦琦2

作者信息 +

A principle of selecting points for identifying joint parameters of a drum-disk structure based on frequency-response functions

WANG Hong-yu1 , QIN Zhao-ye1 , CHU Fu-lei1 , LIU Yan-qi2

Author information +

文章历史 +

摘要

基于频响函数的辨识方法被广泛用于识别结合部动态参数，其中如何选择频响数据是关键问题。本文针对结合部采用弹簧和阻尼器连接的鼓筒-轮盘模型提出了频响数据选取原则和对应于该原则的量化标准。具体选点原则为所选取的局部信噪比最高的频点所对应的模态对连接刚度的综合灵敏度应该最高。为了定量比较不同模态对连接刚度的综合灵敏度，建立了具体的量化指标和标准。理论分析表明本文所提出的频响数据选取原则和量化标准是有效的，具有一定的工程应用价值。

Abstract

Methods based on the frequency-response functions (FRFs) are widely used to identify the joint properties. A key problem in the FRFs-based methods is which FRFs data should be chosen for joint parameter identification. In this paper, a principle for FRFs data selection and a quantitative criterion corresponding to the principle are proposed based on a drum-disk model. The drum and the disk are combined with springs and dampers at the connected joint. The principle is that the comprehensive sensitivity of the mode which corresponds to the selected frequency point with the highest local signal-to-noise ratio (SNR) to the joint stiffness should be the highest. In order to compare the comprehensive sensitivity, a quantitative index is subsequently established. The study shows that the proposed principle and the quantitative criteria are effective and valuable in engineering application.

导出引用

王洪玉1，秦朝烨1，褚福磊1，刘彦琦2. 基于频响函数辨识鼓筒-轮盘结合部连接参数的选点原则[J]. 振动与冲击, 2016, 35(5): 75-81

WANG Hong-yu1,QIN Zhao-ye1,CHU Fu-lei1,LIU Yan-qi2. A principle of selecting points for identifying joint parameters of a drum-disk structure based on frequency-response functions[J]. Journal of Vibration and Shock, 2016, 35(5): 75-81

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