全断面岩石掘进机边缘滚刀优化布置研究

Layout Optimization of TBM Gauge Disc Cutters

为研究全断面岩石掘进机(TBM)边缘滚刀布置规律,文章根据刀盘实际破岩情况和刀盘设计技术要求,提出了边缘滚刀布置的基本原则,确定了边缘滚刀布置的优化目标和约束条件,建立了TBM边缘滚刀多目标优化布置数学模型,分析其目标函数及约束条件函数,并利用遗传算法进行求解。文章以伊朗NASOUND隧道某施工标段所用刀盘边缘滚刀布置为例,对所建立的模型和所采用的优化算法进行验证,并与原TBM边缘滚刀布置方案进行了对比分析。结果表明:优化后的刀盘径向不平衡力下降19.4%,倾覆力矩下降20.6%;刀盘布置优化后强度和刚度有所改良,刀盘最大应力减小了36.6%,最大变形量减小了30.3%。工程实例验证了优化布置数学模型的正确性和可行性,研究内容与方法可为TBM刀盘设计和改进提供理论基础。

In order to study the layout rule of TBM gauge disc cutters, cutter layout prineip[es are put forward as per the aclual rock-breaking conditions and the technical requirements of eutterhead design. The optimization goals and conshaint are determined, anti an optimized multi-targeting mathematical model of a TBM gauge dise cutter is buih lu analyze its objective functiun and constraint condition function and solve it by using a genetie algorithm. Fi- nally, the aforementioned model and algorithm are verified based on the TBM gauge disc cutter layoul of the N ASOUND tunnel in [ran, which is compared with the original layout. The analysis resuhs show that the unbaanced ra- dial fiwee and ovm＇tuming moment of the optimized cutterhead decrease by 19.4% and 20.6%, respectively; the strength and rigidity of the cuttlerhead are improved： and after layout optimizaliun the maximum stress and deformatiun of the eutterhead decrease by 36.6% and 30.3%, respectively, which proves the correctness and feasibility of the mathematical model for cutter layout optimization.This research method can serve as a IheoretieaI fuundatiun for cutterhead design anti modifieation.