基于动力稳定性的全断面岩石隧道掘进机刀盘临界推进速度研究

推进速度是全断面岩石隧道掘进机(Tunnel boring machine,TBM)的重要设计参数。其值过小将降低机械的掘进效率；过大将引起刀盘的大幅振动，导致联接螺栓超常松动、引起主轴承塑性变形与断裂，严重影响施工安全。为确定推进速度的临界值，引入非线性弹簧单元模拟破岩过程中滚刀与岩石的相互作用，采用有限元法对刀盘掘进过程进行动态仿真，得到了在不同岩层中掘进时保证刀盘动力稳定性的推进速度临界值。所得结果可为合理设计TBM推进速度，有效控制刀盘振动，减少振动破坏，提升TBM的地质适应性和施工安全性提供参考。

Study on the Critical Driving Speed of the Tunnel Boring Machine Cutterhead Based on the Dynamic Stability

Driving speed is a significant design parameter for tunnel boring machine (TBM). Low driving speed maybe reduce tunneling efficiency and high one maybe affect the safety of construction by causing the severe vibration which can make the bolts loose and make the spindle bearings broken. To determine the critical value of driving speed of the cutterhead in tunneling, a finite element model is proposed to perform the dynamic simulation on the tunneling process by introducing nonlinear spring elements to simulate the interaction between the cutterhead and the rock. Critical driving speeds to ensure the dynamic stability of the cutterhead are obtained for different rock formation. The results may be useful for determining the driving speed of TBM to control the cutterhead vibration and to reduce vibration damage. They may also be used to promote the geological adaptability and safety of TBM.