钢筋混凝土构架式动力基础不良振动检测分析
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摘要
为查找某鼓风机基础不良振动的原因,用DASP系统对不同工况的动力机组及基础进行了测试分析,主要分析了互功率谱及相位,加速度谱及特征频率。基础三个方向上各测点的互功率谱峰值所对应的相位差不为0°或180°,风机基础的基频为1.12Hz,远小于设备的工作频率,不存在共振现象。动力机组的特征频谱显示低速轴的工频和2倍频都较大,说明加速机转轴存在故障。在检测分析结果基础上,并提出了减振对策。
In order to find the reason to cause blower foundation harmful vibration,monitoring and analysis are done to dynamic machine groups under different circumstances by DASP systems.Such parameters are mainly studied as Cross Power Spectrum Phase,acceleration spectrum and characteristic frequency.On the three dimension of foundations,The phase Difference between Cross Power Spectrum peaks are not 0 or 180 degree,and the base frequency of blower foundation is 1.12 Hz,which is far smaller than the machine working frequency,resulting in no resonance.The dynamic machine characteristic frequencies show that the working frequency and double frequency are significant,indicating that the accelerating machine shaft has fault.On the basis of monitoring results,the countermeasures of vibration absorption are put forward.
In order to find the reason to cause blower foundation harmful vibration,monitoring and analysis are done to dynamic machine groups under different circumstances by DASP systems.Such parameters are mainly studied as Cross Power Spectrum Phase,acceleration spectrum and characteristic frequency.On the three dimension of foundations,The phase Difference between Cross Power Spectrum peaks are not 0 or 180 degree,and the base frequency of blower foundation is 1.12 Hz,which is far smaller than the machine working frequency,resulting in no resonance.The dynamic machine characteristic frequencies show that the working frequency and double frequency are significant,indicating that the accelerating machine shaft has fault.On the basis of monitoring results,the countermeasures of vibration absorption are put forward.
引文
[1]徐建.建筑振动工程手册[M].北京:中国建筑工业出版社,2002.
[2]侯兴民,马小燕,吴汉生,等.动力机器基础振动与设计若干问题的讨论[J].地震工程与工程振动,2008,28(3):131-137.
[3]王锡康.动力机器基础振动学科在我国的发展及需研究的若干问题[J].工业建筑,2007,37(6):83-90.
[4]张荣山.工程振动与控制[M].北京:中国建筑工业出版社,2003.
[5]刘广萍.受高频率机组振动基础的结构设计[J].建筑技术开发2000,27(4):2-3.
[6]倪振华.振动力学[M].西安:西安交通大学出版社,1986.
[7]赵华.振动监测方法在工程机械状态监测与故障诊断中的应用[J].铁道工程学报,2000,74(2):90-92.
[2]侯兴民,马小燕,吴汉生,等.动力机器基础振动与设计若干问题的讨论[J].地震工程与工程振动,2008,28(3):131-137.
[3]王锡康.动力机器基础振动学科在我国的发展及需研究的若干问题[J].工业建筑,2007,37(6):83-90.
[4]张荣山.工程振动与控制[M].北京:中国建筑工业出版社,2003.
[5]刘广萍.受高频率机组振动基础的结构设计[J].建筑技术开发2000,27(4):2-3.
[6]倪振华.振动力学[M].西安:西安交通大学出版社,1986.
[7]赵华.振动监测方法在工程机械状态监测与故障诊断中的应用[J].铁道工程学报,2000,74(2):90-92.
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