摘要
针对锅炉炉墙振动常发影响其安全运行的问题,通过试验研究了某电厂60MW机组锅炉炉膛振动特性,并利用Ansys软件进行结构动力学模拟分析,提出了减振改造方案:增设拉杆连接,提高刚性梁刚度;分散吹灰器质量,减小集中质量.通过理论分析获得锅炉炉墙改造前后的固有频率以及强迫振动下各测试点的振动位移.结果表明:模拟中改造方案最大可减小84.3%的振动位移,而实际测得最大可减小79.2%的振动位移.
To overcome the abnormal vibration faults frequently occurring in boiler water walls that may affect the safety operation of the boiler, vibration characteristics of a 60 MW boiler furnace were experimentally studied and numerically simulated with Ansys software, after which vibration suppression measures were proposed and implemented, such as adding pulling bars to enhance the stiffness of rigid beams, and hanging the soot blowers to reduce the concentrated mass, etc. In addition, inherent frequencies of boiler water walls before and after retrofit, and also the vibration displacement of each measuring point under circumstance of forced vibrations, were obtained via numerical simulation. Results show that the vibration displacement can be reduced by a maximum of 84.3% and 79.2% respectively in simulated scheme and actual measurement.
出处
《动力工程学报》
CAS
CSCD
北大核心
2016年第6期436-441,460,共7页
Journal of Chinese Society of Power Engineering
基金
国家重点基础研究发展计划资助项目(973计划)(2015CB251501)
国家科技支撑计划资助项目(2012BAA12B03)
关键词
炉墙振动
模态分析
强迫振动
现场改造
furnace wall vibration
modal analysis
forced vibration
on-site retrofit
