中文摘要：

研究目的：为了研究盾构切刀在切削软岩过程中的磨损特性和磨损影响因素,分析切刀与软岩作用下前刀刃面和后刀刃面的接触应力,并结合切刀切削过程中的运动轨迹,建立切刀切削软岩磨损模型。本文分析切深、转速和切刀前、后角对刀刃磨损量的影响,并通过试验进行验证。研究结论：建立的切刀刀刃磨损模型,理论分析和试验结果表明：（1）随着切深的增加,切刀刀刃磨损量增加;（2）随着切刀前角的增加,切刀刀刃的磨损量减小;（3）随着切刀后角的增加,切刀刀刃磨损量减小;（4）在切刀切削距离一定的情况下,刀盘转速对切刀磨损量的影响不大;（5）试验结果与理论模型分析结果基本一致,可以验证理论磨损模型的正确性;（6）本研究成果可为盾构切刀的磨损研究和切刀的结构设计提供借鉴和参考。

英文摘要：

Research purposes： In order to study the wear characteristics of shield cutter and the factors influencing cutter wear while cutter is cutting soft rocks, the contact force between cutter and soft rock on rake face and rear face was analyzed, and combined with the analysis of trajectory of cutter, a wear model of shield cutter was established based on abrasive wear equation. The impact of cutting depth, rotate speed of cutter head, rake angle and rear angle on cutter wear were analyzed. By producing concrete simulating soft rock and using cutters of different structures, an experiment was done with the use of rotary test - bed to analyze the factors influencing cutter wear. The experiment has researched the effect of cutting depth, rotate speed of cutter head, rake angle and rear angle on cutter wear.Research conclusions： A wear model of shield cutter was established, the results of the study indicates ： （ 1 ） With the increasing of cutting depth, the contact force between cutter and soft rock increased, the effects of micro - cutting and ploughing enhanced, which resulted to the increasing of wear volume. （2） With the increasing of rake angle, the contact force on rake face between cutter and soft rock decreased, leading to the reduction of cutter wear volume. （3） With the increasing of rear angle, the contact force on rear face between cutter and soft rock decreased, leading to the reduction of cutter wear volume. （4）The rotate speed of cutter head has little influence of cutter wear volume if the cutting length remains the same. （5） The results of the experiment were consistent with the wear model, which validated the correctness of the theoretical model. （6） The research methods and results can provide reference for research and design of shield cutter.