全断面岩石掘进机边缘滚刀优化布置研究

摘要

In order to study the layout rule of TBM gauge disc cutters, cutter layout principles are put forward as per the actual rock-breaking conditions and the technical requirements of cutterhead design. The optimization goals and constraints are determined, and an optimized multi-targeting mathematical model of a TBM gauge disc cutter is built to analyze its objective function and constraint condition function and solve it by using a genetic algorithm. Fi⁃nally, the aforementioned model and algorithm are verified based on the TBM gauge disc cutter layout of the NA⁃SOUND tunnel in Iran, which is compared with the original layout. The analysis results show that the unbalanced ra⁃dial force and overturning moment of the optimized cutterhead decrease by 19.4% and 20.6%, respectively; the strength and rigidity of the cuttterhead are improved;and after layout optimization the maximum stress and deforma⁃tion of the cutterhead 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 theoretical foundation for cutterhead design and modification.%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。