Vibration analysis of vertical shaft tower structures of Muduchaideng Coal Mine
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摘要: 母杜柴登矿立井井塔在68.37 m楼层上安装有一套提升系统，当提升机组以13 m/s全速运转时，井塔第7层西区楼板的中部及第6层南区、北区楼板的中部楼板体系产生了较大的振动。针对上述问题，采用振动动态测试方法对提升机组、井塔不同位置的时域和频域信号进行了测量和分析，结果表明，井塔第6层、第7层楼板的自振频率非常接近提升机组电动机的固有振动频率（22.1 Hz），需调整提升设备的动力系统或井塔的第6层、第7层楼板体系的刚度，避免提升机-井塔结构耦合体系发生共振；随着提升速度的增加，第6层、第7层楼板的振动烈度逐渐变大，需提高提升设备机座与基梁间的装配精度，降低楼板振动位移。Abstract: There is a hoisting system in 68.37 m floor of vertical shaft tower of Muduchaideng Coal Mine. When vertical shaft hoisters were in full speed of 13 m/s ,the middle floor structure of the seventh floor's west side and the sixth floor's north side and south side would occur an enormous vibration. In view of above problems, a vibration dynamic test method was used to measure and analyze time domain signal and frequency domain signal of different location of the hoister and the vertical shaft tower, the results show that the natural vibration frequency of the sixth and the seventh floor are close to the natural vibration frequency of the motor of hoisters which is 22.1 Hz，it should adjust power system of the hoister equipments or the stiffness of the sixth and the seventh floor system to avoid resonance of coupling system of hoister-tower strectures; with increasing of hoisting speed, vibration intensity of the sixth and the seventh floor are gradueully becoming bigger, it should improve assembly accuracy between base and base beam of the hoister equipments to reduce vibration displacement of the floors.
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期刊类型引用(3)
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