基于环境激励的塔器模态参数识别研究

摘要

The modal parameters of the tower are the main parameters of the dynamic characteristics.How to obtain the modal parameters is an urgent problem.This paper is the first to identify the modal parame-ters of the tower by ambient excitation method.Combining with the random decrement technique,modal parameters are extracted from the acceleration response signal.Numerical simulation and practical testing show that the method proposed in this paper has the feature of high precision and easy completing.This method can give a reference to future research.%塔器的模态参数是影响设备动力学特性的重要指标,如何准确方便地获取塔器的模态参数是亟待解决的问题.首次将环境激励法用于塔器的参数识别,通过结合随机减量技术,从塔器的加速度响应信号中提取了模态参数.模拟计算与现场测试结果表明本文的方法易实施、精度高,具有工程应用价值.此方法可为今后塔器模态参数的测量和识别提供参考.