湖北文理学院学报Issue(2)：21-23,29,4.
利用试验模态分析技术研究汽机基础的自振特性
Natural Vibration Characteristics of Turbo-generator Foundation via Modal Analysis
摘要
Abstract
A natural vibration characteristics test on a physical model(scale is 1:10) of 660MW turbo-generator foundation of a power plant is made by using modal analysis. The structural dynamic characteristic parameters of this foundation, such as natural frequency, vibration mode and damping ratio, are obtained through the test. The results show that no resonance will happen between turbo-generator foundation and each rotor of turbo-generator unit during the run-up or run-down periods. It occurred many times local vibration during the frame column of the condensers and the midspan of the beam at the bottom column, this article makes suggestions that using a short column connects the upper and lower beams. Local vibration occurred on the middle platform of the generatior in 50Hz± 5%frequency range, so it is suggested vibration reduction treatments on the middle platform. This research provides areference for the dynamic modificationand optimization design of the turbo-generator foundation in the future.关键词
汽轮发电机基础/模态分析/动力特性Key words
Turbo-generator foundation/Modal analysis/Dynamic performance分类
建筑与水利引用本文复制引用
李文君,刘波,屈铁军..利用试验模态分析技术研究汽机基础的自振特性[J].湖北文理学院学报,2015,(2):21-23,29,4.基金项目
国家自然科学基金面上项目(50678001) （50678001）
湖北文理学院校级教学研究项目(JY2014044) （JY2014044）
湖北文理学院2014年度创新性实验(实践)建设项目 （实践）
