摘要：cutterhead loads are the key mechanical parameters for the strength design of the full face hard rock tunnel boring machine(TBM).Due to the brittle rock-breaking mechanism,the excavation loads acting on cutters fluctuate strongly and show some *** conventional method that using combinations of some special static loads to perform the strength design of TBM cutterhead may lead to strength failure during working *** this paper,a three-dimensional finite element model for coupled cutterhead–Rock is developed to determine the cutterhead *** the distribution characteristics and the influence factors of cutterhead loads are analyzed based on the numerical *** is found that,as time changes,the normal and tangential forces acting on cutters and the total torque acting on the cutterhead approximately distribute log normally,while the total thrusts acting on the cutterhead approximately show a normal ***,the statistical average values of cutterhead loads are proportional to the uniaxial compressive strength(UCS)of cutting *** values also change with the penetration and the diameter of cutterhead following a power *** on these findings,we propose a three-parameter model for the mean of cutterhead loads and a method of generating the random cutter *** the strength properties of a typical cutterhead are analyzed in detail using loads generated by the new *** optimized cutterhead has been successfully applied in *** method in this paper may provide a useful reference for the strength design of TBM cutterhead.