基于数字样机技术的隧道掘进机刀盘破岩机理分析

摘要

The rock-broken mechanism during the operation of the cutter head of TBM was analyzed to study the layout of cutters.A model of the cutters under the action of forces during TBM's working was therefore developed,thus a scheme was proposed to improve the rock breakability of TBM's cutter head on which the cutters were laid out.Then,a nonlinear multi-objective mathematical model with complex constraints was developed,and an optimization program was provided via an intelligent algorithm for the layout design of cutters on the tunnel shield/cutter head of a TBM.Focus on EPB φ6.28m fullface TBM,a rock breakage finite element mode was founded.Single disc cutter rock breakage simulation and adjacent disc cutter rock breakage simulation were calculated with setting of real working conditions.Penetration rate,granite stress distribution results under different normal forces and optimal cutter distances were obtained,providing significant results for disc cutter and cutter head's parameter design and layout optimization.%针对隧道掘进机(TBM)刀盘设计中刀具布置规律优化的问题,分析了TBM刀盘的破岩机理,建立了TBM工作时的刀具受力模型,并提出了如何提高刀盘破岩性能的方案.构建了带复杂约束的多变量非线性目标数学模型,并采用智能算法开发了一种针对刀盘上刀具布置规律的优化程序.针对EPB φ6.28m型TBM刀盘上的盘形滚刀建立了破岩仿真有限元分析模型.在滚刀工作时的实际工况条件下进行了岩石压痕试验与线性切槽试验的仿真分析,获得了该盘形滚刀工作时的压力一贯入度关系以及最优刀间距范围,为TBM刀盘和盘形滚刀的参数设计以及刀具布局优化提供了参考.