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全断面岩石掘进机(TBM)是高度自动化的隧道掘进机械设备,其滚刀布局设计是刀盘快速有效掘进的关键技术。通过对TBM刀盘滚刀基本布局原则的总结,结合现有螺旋线布刀规律的研究分析,提出了变速螺旋线滚刀布局设计方法。基于滚刀破岩量差异最小化思想对正滚刀布局建立多目标优化模型,采用极径与极角分步优化设计,利用遗传算法对正滚刀极径进行优化设计模型求解,再利用NSGA-Ⅱ算法对其极角多目标优化模型求解。以TB880E刀盘滚刀布局为算例,对其正滚刀布局优化设计进行分析,与原有刀盘滚刀布局对比得出:不平衡径向力下降了33.9%,刀盘倾覆力矩下降了78.1%,正滚刀破岩方差也有了很大程度地减小,优化结果更利于正滚刀的均衡磨损。滚刀整体布局质心也更靠近刀盘中心。
Full-face rock road boring machine (TBM) is a highly automated tunnel boring machine. Its hob layout design is the key technology for fast and effective boring of cutterhead. Based on the summary of the principle of TBM hob cutter basic layout principle, combined with the existing spiral cloth knife law research and analysis, put forward a variable speed helical hob layout design method. Based on the idea of minimizing the difference of rock breaking amount, a multi-objective optimization model was established for the positive hob layout. The optimal design of the polarities of the positive hobs was solved by genetic algorithm, -Ⅱ algorithm to solve its polar angle multi-objective optimization model. Taking the TB880E cutter hob layout as an example, the optimization design of its front cutter layout was analyzed. Compared with the original cutter hob layout, the unbalanced radial force decreased by 33.9% and the cutter overturning moment decreased 78.1%. The variance of rock breaking and rock breaking has also been greatly reduced, and the optimization result is more conducive to the balanced wear and tear of the hob. Hob overall layout of the center of mass is also closer to the cutter center.