摘要
针对甘肃景泰电力提灌总干二泵站存在的压力管道振动问题,基于DASP振动测试系统获得振动信号,通过时域分析法和频谱分析法分析各工况下的振动信号,得到各工况下振源的主要频率;运用功率谱法,分析出压力管道振动存在的主要振源。分析结果表明,引起管道振动的主要原因是离心泵等设备引起的机械振动,水流激励次之,并针对此结论提出相应的减振措施。
For the vibration problems of pressure pipeline existing in the 2nd pump station in general main line of Jingtai electric-lifting irrigation project in Gansu Province, the vibration signals were obtained on the basis of DASP vibration detecting system. And then the methods of time domain analysis and frequency spectrum analysis are used to analyze the vibration signals and the main frequencies of vibration sources were got under different operating conditions. Finally, the main vibration source of pressure pipeline is analyzed by using power spectrum method. The results show that the main reason of pipeline vibration is the mechanical vibration caused by centrifugal pump and other facilities, and the hy draulic excitation takes second place. Thus, the corresponding vibration-reduction measures were proposed.
出处
《水电能源科学》
北大核心
2014年第5期151-154,共4页
Water Resources and Power
基金
国家自然科学基金项目(51279064
31360204)
华北水利水电大学高层次人才科研启动计划(201069)
关键词
管道振动
激励源辨识
频谱分析
功率谱分析
减振措施
pipeline vibration
excitation source identification
spectrum analysis
power spectrum analysis
vibra tion reduction measures
