为解决全断面硬岩隧道掘进机（TBM）作业过程中，因主轴承载荷谱预测困难而无法计算主轴承服役寿命的问题,开展基于滚刀-主轴承力流模型预测TBM主轴承载荷谱方法的研究，基于CSM模型与秋三藤三郎模型，建立滚刀破岩载荷预测模型。结合TBM作业工况与刀盘滚刀分布情况，根据理论计算模型与有限元分析模型，建立多工况的刀盘-主轴承力流模型得到原始载荷。考虑TBM强冲击工作环境对载荷谱的影响，对比现场监测振动数据，引入冲击载荷系数，建立计算模型，得到主轴承载荷谱。研究结果表明： 1）TBM在全推力工况下的工作时间占比达65%； 2）4种工况中轴向力与倾覆力矩变化较大，径向力较为稳定； 3）在全推力工况下主轴承主要承受轴向力，最高达到14 374 kN，与有限元分析结果相差5%。最后将计算结果与TBM实际施工数据对比，验证了模型的准确性。

The service life of the main bearing cannot be calculated resulting from the difficulty in load spectrum prediction during the operation of the fullsection hard rock tunnel boring machine(TBM). Therefore, a method to predict the load spectrum of the TBM main bearing based on the disc cuttermain bearing force flow model is studied. Based on tunnel engineering geological conditions, a prediction model of disc cutter rock breaking load is established based on code security module model and Akisanto Saburo model. Based on TBM operating conditions and disc cutter distribution on cutterhead, a cutterheadmain bearing force flow model under multiple working conditions is established based on theoretical calculation model and finite element analysis model to obtain the original load. Considering the influence of the strong impact working environment on the load spectrum of TBM, the impact load coefficient is introduced and the calculation model is established to obtain the load spectrum of the main bearing. The results show the following: (1) The working time of TBM under the full thrust accounts for 65%. (2) The axial force and overturning moment vary greatly under the four working conditions, whereas the radial force is stable. (3) Under the full thrust, the main bearing mainly bears the axial force, up to 14 374 kN, which is 5% different from the result of finite element analysis. The calculation results are compared with the actual construction data of TBM to verify the accuracy of the model and provide a reference for the design and life prediction of the TBM main bearing.