适用空间网格结构模态识别的改进功率谱峰值法

张毅刚;刘才玮;吴金志;彭天明

振动与冲击 ›› 2013, Vol. 32 ›› Issue (9) : 10-15.

PDF(3877 KB)
PDF(3877 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (9) : 10-15.
论文

适用空间网格结构模态识别的改进功率谱峰值法

  • 张毅刚1,2,刘才玮1,吴金志1,彭天明3
作者信息 +

The improved power spectrum peak method applied in the modal identification field of the spatial lattice structure

  • ZHANG Yi-gang 1, 2, LIU Cai-wei 1, WU Jin-zhi 1, PENG Tian-ming3
Author information +
文章历史 +

摘要

根据空间网格结构模态密集特点,对传统功率谱峰值法进行改进。提出在获得所有测点平均正则化功率谱基础上,结合结构的理论振型特点计算辅助正则化功率谱,取两者并集为模态识别结果的方法,讨论有关判断准则。改进的功率谱峰值法可更好地避免模态遗漏及进行重叠频率的筛选,网架模型算例表明效果良好。并将编制的分析软件应用于深圳大运会主场馆振动监测系统中。

Abstract

The traditional power spectrum density peak method is improved according to the feathers that the mode shape of the spatial lattice structures is dense .The average regularization power spectrum of all the test points is put forward, and on the basis of the characteristics of the mode shape in theory, and the above union sets are defined as the method of the modal identification results, besides, judgment criterion is discussed in this paper. The improved power spectrum density peak method can avoid the omission and overlapping of the identification of the frequency, the numerical example afterwards shows that the effect is good. A software is made based on the above theory and has been applied to the monitoring system of the stadium for Shenzhen Universiade.

关键词

模态参数识别 / 功率谱峰值法 / 判别准则 / 深圳大运会体育场

Key words

modal parameters identification / power spectrum density peak method / ambient excitation / The stadium for Shenzhen Universiade

引用本文

导出引用
张毅刚;刘才玮;吴金志;彭天明. 适用空间网格结构模态识别的改进功率谱峰值法[J]. 振动与冲击, 2013, 32(9): 10-15
ZHANG Yi-gang;;LIU Cai-wei;WU Jin-zhi;PENG Tian-ming. The improved power spectrum peak method applied in the modal identification field of the spatial lattice structure[J]. Journal of Vibration and Shock, 2013, 32(9): 10-15

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