中文摘要：

刀盘是硬岩掘进机（TBM）的关键部件,为了研究刀盘刀具与掘进面耦合作用下载荷分布与变化规律,建立了某供水工程TBM刀盘-岩石相互作用的三维分析模型,基于显式动力学方法模拟TBM刀盘掘进过程,研究掌子面岩体的损伤失效状态以及刀盘刀具的动态掘进载荷。研究得到了全盘刀具三向力载荷及刀盘总载荷（总推力、总扭矩）,其中刀盘扭矩平均值1560k N·m,最大值5880k N·m,推力平均值3444k N,最大值7296k N;通过工程实例验证,得到实测载荷值稍大于仿真值,总推力误差为15.74%,总扭矩误差为15.38%,验证了仿真结果的有效性。在此基础上,对刀盘的动静态响应特性进行研究,得到刀盘在极限工况下最大应力100MPa,最大变形0.695mm,确定刀盘有足够的刚度强度。

英文摘要：

The cutterhead is the most important part of a tunnel-boring machine （TBM）. To determine the load distribution and load variations under the action of coupling of the cutterhead and the cutters, a three-dimensional model of interactions between a water diversion project＇ s TBM cutterhead and the rock was established. Based on an explicit dynamics algorithm, the entire excavation process of the TBM cutterhead was simulated and the state of the tunnel face and the dynamic tunneling load on the cutterhead were obtained. By analysis, the distribution and variation of the three-dimensional mechanical loads on each disc cutter and the total load on the cutterhead were ob- tained. The average torque of the cutterhead was 1 560 kN· m, and the maximum was 5 880 kN ·m. The average thrust was 3 444 kN, and the maximum was 7 296 kN. Verification provided by an actual project showed that the real measured load was slightly larger than the simulation values. The total thrust error was 15.74%, and the total torque error was 15.38%; therefore, the effectiveness of the simulation results was verified. Based on this, research into the static and dynamic response characteristics of the cutterhead showed that the cutterhead maximum bearing stress was 100 MPa, and the maximum deformation was 0.695 mm; therefore, the cutterhead was judged to be of sufficient strength and stiffness.