关键词: 土压平衡盾构机, 刀盘, 聚合代理模型, 轻量化设计, 熵权TOPSIS

Abstract: Aiming at reducing the high computational costs and over-reliance on experience in the lightweight design for Earth Pressure Balance (EPB) shield cutter head,a lightweight design method based on ensemble surrogate model was proposed.Through the entropy weight TOPSIS analysis,three structural parameters that had significant impacts on the performance response of the shield cutter head (weight,maximum deformation and maximum stress) were selected as the design variables.Based on the radial basis function model,Kriging model and support vector regression model,the ensemble surrogate model was used to fit the implicit relationship between the design variables and performance responses.The lightweight design model of EPB shield cutter head was constructed and optimized by sequential quadratic programming algorithm.The finite element analysis results showed that the proposed method could reduce the weight by 7.44%,which met the requirements of stress and deformation and had a good lightweight effect.

Key words: earth pressure balance shield, cutter head, ensemble surrogate model, lightweight design, entropy weight TOPSIS