全断面岩石隧道掘进机(TBM)在掘进过程中，承受不断变化的大推力、大扭矩、倾覆力矩等随机载荷，引起主机较大的振动。为了减少主机系统各部件的疲劳失效，提高掘进效率，基于动力学仿真软件建立了主梁式TBM主机系统动力学模型，研究主机系统的动力学特性及主梁结构参数对其动力学特性的影响规律。研究结果表明：主梁1长度增加会导致主梁1振动变大，主梁2和鞍架的振动减小。主梁1板厚增加会导致主梁1振动减小，主梁2的振动缓慢增大，鞍架的振动先增加后减小，在上、下腹板厚度50 mm，侧板厚度40 mm，前、后法兰厚度105 mm时，振动达到最大值；刀盘掘进方向的加速度有效值为1.1g，主梁加速度有效值为0.21g，随着向后传递振动逐渐减弱，振动频率主要集中在0~50 Hz；依据仿真结果确定了主梁的相关参数，该TBM在某引水工程中经过2年的应用，工程已顺利贯通；现场测试结果表明，三向振动测试数据与仿真结果的误差基本低于20%。
Abstract
Abstract:Full-face rock tunnel boring machine (TBM) bears changing large thrust, torque and overturning moment in the process of excavation, which causes mainframe vibration response.In order to reduce fatigue failure of mainframe and improve tunneling efficiency, a dynamic model of the main beam TBM mainframe was based on the dynamics simulation software, the dynamic response of mainframe and the influence law of main beam structural parameters on the dynamic characteristics of TBM were investigated.The results show that an increase in the length of the first main beam will cause its vibration to increase, and the vibration of the second main beam and saddle will decrease.An increase in the thickness of the first main beam will cause its vibration to decrease, the vibration of the second main beam increases slowly, and the vibration of the saddle first increases and then decreases.When the thickness of the upper and lower webs is 50 mm, the thickness of the side plates is 40 mm, and the thickness of the front and rear flanges is 105 mm, the vibration reaches maximum.The acceleration RMS of the cutterhead in the tunneling direction is 1.1g, and the acceleration RMS of the main beam is 0.21g, and as the vibration transferred backward gradually weakened, the frequency of varies is mainly between 0—50 Hz; According to the simulation results, the relevant parameters of the main beam were determined.The TBM has been applied for 2 years in a water diversion project, and the project has been successfully completed.Field test results show, the error between the three-way vibration test data and the simulation results is basically less than 20%.
关键词
主机系统 /
动力学模型 /
主梁 /
结构参数 /
影响规律
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Key words
mainframe /
dynamic model /
main beam /
structural parameters /
influence law
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