Studies to date have failed to consider gage disc cutters’variable cutting depth and the constraints of cutter-head welds,and have ignored the coupling mechanism between the profile of the full-face rock tunnel-borin...Studies to date have failed to consider gage disc cutters’variable cutting depth and the constraints of cutter-head welds,and have ignored the coupling mechanism between the profile of the full-face rock tunnel-boring machine(TBM)cutter-head and the assembled radius layout of the disc cutters.To solve these problems,an adaptive design method for studying cutter layout was proposed.Taking the bearing stress of the outermost gage disc cutter as an index,the profile of the cutter-head was determined.Using a genetic algorithm and based on the principles of equal life and equal wear,the assembled radii of the cutters were optimally designed.Boundary conditions of non-interference between the cutters,manholes,muck buckets and welding lines were given when a star layout pattern was used on cutters.The cutter-head comprehensive evaluation model was established by adopting relative optimization improvement degree of evaluation indices to achieve dimensional consistency.Exemplifying the MB264-311-8030 mm tape TBM cutter-head,the calculations show that compared with the original layout scheme,among the 51 disc cutters,the largest gap of the cutters’assembled radiuses is only 25.8 mm,which is 0.64%of the cutter-head’s radius and is negligible.The cutter-head’s unbalanced radial force decreases by 62.41%,the overturning moment decreases by 33.22%,and the cutter group’s centroid shift increases by only 18.48%.Each index is better than or approximately equal to the original cutter-head layout scheme,and the equivalent stress and deformation are both smaller;these results fully verify the feasibility and effectiveness of the method.展开更多
基于科罗拉多矿业学院(Colorado School of Mines)推导的CSM受力模型,采用刀盘破岩比能最低原则,以径向不平衡力和倾覆力矩最小为目标,使用标准遗传算法(GA),优化中心刀、正刀和边缘滚刀的刀间距,以及正刀和边缘滚刀的极角.以TB880E刀...基于科罗拉多矿业学院(Colorado School of Mines)推导的CSM受力模型,采用刀盘破岩比能最低原则,以径向不平衡力和倾覆力矩最小为目标,使用标准遗传算法(GA),优化中心刀、正刀和边缘滚刀的刀间距,以及正刀和边缘滚刀的极角.以TB880E刀盘为实例计算,结果表明:优化中心刀和正刀区域的刀间距后,比能减少1.53%,优化边缘滚刀区域的刀间倾角后,比能减少了1.10%;优化正刀和边缘滚刀的极角后,径向不平衡力减少到0.126 5 N,倾覆力矩减少到0.759 1 N·m,从而减小了刀盘的变形量.该研究可用于刀盘的布刀优化设计和对破岩过程能耗的预测,可降低TBM破岩能耗,改善TBM掘进能力.展开更多
基金Projects(51275339,51575379,51675374)supported by the National Natural Science Foundation of ChinaProject(2013CB035402)supported by the National Hi-tech Research and Development Program of China
文摘Studies to date have failed to consider gage disc cutters’variable cutting depth and the constraints of cutter-head welds,and have ignored the coupling mechanism between the profile of the full-face rock tunnel-boring machine(TBM)cutter-head and the assembled radius layout of the disc cutters.To solve these problems,an adaptive design method for studying cutter layout was proposed.Taking the bearing stress of the outermost gage disc cutter as an index,the profile of the cutter-head was determined.Using a genetic algorithm and based on the principles of equal life and equal wear,the assembled radii of the cutters were optimally designed.Boundary conditions of non-interference between the cutters,manholes,muck buckets and welding lines were given when a star layout pattern was used on cutters.The cutter-head comprehensive evaluation model was established by adopting relative optimization improvement degree of evaluation indices to achieve dimensional consistency.Exemplifying the MB264-311-8030 mm tape TBM cutter-head,the calculations show that compared with the original layout scheme,among the 51 disc cutters,the largest gap of the cutters’assembled radiuses is only 25.8 mm,which is 0.64%of the cutter-head’s radius and is negligible.The cutter-head’s unbalanced radial force decreases by 62.41%,the overturning moment decreases by 33.22%,and the cutter group’s centroid shift increases by only 18.48%.Each index is better than or approximately equal to the original cutter-head layout scheme,and the equivalent stress and deformation are both smaller;these results fully verify the feasibility and effectiveness of the method.
文摘基于科罗拉多矿业学院(Colorado School of Mines)推导的CSM受力模型,采用刀盘破岩比能最低原则,以径向不平衡力和倾覆力矩最小为目标,使用标准遗传算法(GA),优化中心刀、正刀和边缘滚刀的刀间距,以及正刀和边缘滚刀的极角.以TB880E刀盘为实例计算,结果表明:优化中心刀和正刀区域的刀间距后,比能减少1.53%,优化边缘滚刀区域的刀间倾角后,比能减少了1.10%;优化正刀和边缘滚刀的极角后,径向不平衡力减少到0.126 5 N,倾覆力矩减少到0.759 1 N·m,从而减小了刀盘的变形量.该研究可用于刀盘的布刀优化设计和对破岩过程能耗的预测,可降低TBM破岩能耗,改善TBM掘进能力.
