隧道掘进机支撑推进系统振动特性

Vibration characteristics of TBM supporting-thrusting system

为了研究全断面隧道掘进机(tunnel boring machine,TBM)支撑推进系统掘进过程中的振动问题,基于多体系统动力学仿真平台,对TBM掘进过程进行动力学仿真研究,得到TBM支撑推进系统各部件的振动加速度,进行时域和频域分析.对比不同方向的加速度有效值和不同部件的加速度有效值,分析TBM支撑推进系统掘进方向的载荷传递规律.结果表明:TBM支撑推进系统的振动以低频为主,其中主梁二振动频率集中在20~30Hz和46~56Hz.TBM支撑推进系统的振动集中在掘进方向,主梁二掘进方向加速度最大值达到11.80m/s2.部件距离刀盘质心越远,振动加速度有效值越小.掘进方向载荷从刀盘传递到主梁一均值减小了42.7%,变化幅度减小了58.3%.对吉林引松工程的TBM进行了振动测试,测试结果一定程度上验证了仿真结果.

The dynamic simulation of TBM tunneling was conducted based on the multi-body system dynamic simulation platform,in order to analyze the vibration problem of the tunnel boring machine（TBM）supporting-thrusting system during tunneling.The vibration accelerations of TBM supporting-thrusting system were obtained and analyzed in time domain and frequency domain.The acceleration root mean square（RMS）in different directions and the acceleration RMS of different components were compared respectively.The load transferring law of TBM supporting-thrusting system was analyzed.Results show that the vibrations of the TBM supporting-thrusting system are mainly low frequency and the vibration frequency of the second main beam is concentrated in the range of 20-30 Hz and 46-56 Hz.The vibration of TBM supporting-thrusting system is mainly concentrated in tunneling direction and the maximum vibration of the second main beam in tunneling direction reaches to 11.80 m/s2.The further the component is away from the centroid of the cutterhead,the smaller is the vibration acceleration RMS.The average input load of the first main beam is 42.7%less than the cutterhead and the amplitude of the input load decreases by 58.3%.The vibration test on the TBM in Songhuajiang water supply project was conducted.The test result verified the simulation results to a certain extent.