盾构机刀盘适应性改造研究OA

The adaptive modification of the shield machine cutterhead is a critical approach to achieving the resource recycling and green,low-carbon development of advanced equipment.This paper analyzed the forms of adaptive modification for the cutterhead based on the engineering case studies,presented the force calculation formulas for the cutterhead,and conducted analysis on the strength and stiffness of the cutterhead based on its finite element model.The results demonstrated that the modifications of opening ratio and diameter were the primary forms of the adaptability modification.The open ratio modification could enhance the adaptability of the cutterhead to the stratum,while the diameter modification could extend the applicability.The ratio range of the theoretical value of propulsion resistance of the cutterhead to the measured value of the total thrust force of the shield was 32%-58%,and the maximum relative error between the theoretical value and the maximum measured value of the rotational resistance torque was 5%,which verified the correctness of the theoretical analysis of the cutterhead force.Based on the results of the finite element analysis,enhancing the strength and stiffness could make the cutterhead meet the usage requirements.For the areas with stress concentration or excessive deformation in the cutterhead,reinforcement design must be carried out,and the welding quality must be guaranteed.The research results provide the theoretical support and practical references for the remanufacturing of the cutterhead.