盾构机刀盘推力试验研究

Test study on thrust of cutter head of shield machine

针对盾构机施工现场环境恶劣,难以直接测量其刀盘推力的问题,提出了一种试验和有限元仿真相结合的测量方法。首先建立了盾构试验样机,搭建相应的试验装置,以该样机实际切削工况作为边界条件进行有限元仿真,分析刀盘及胸板上的应力分布,并以此确定试验时应力采集点的位置。对比试验结果和仿真分析,建立采集应力和样机刀盘推力之间的关系。试验结果表明,测得推力与液压缸实际推力平均误差为6.69%。该试验方法为类矩形盾构机刀盘推力的测量提供了理论依据。

Due to severe surroundings of the construction scene of the shield machine,the thrust of the cutter head was hard to directly measure,so a measurement method combining test and finite element simulation was proposed.First,the test prototype of the shield machine was built,and corresponding test device was established.After that,the actual cutting mode of the prototype was taken as the boundary condition to conduct finite element simulation,and the stress distribution of the cutter head and the chest plate was analyzed,so as to determine the location of stress testing points.After test results and simulation analysis being compared,the relationship between the tested stress and the thrust of the prototype cutter head was established.The test results showed the average error between the tested thrust and the actual thrust of the cylinder was about 6.69%.The test method offered theoretical reference for the measurement of the thrust of the cutter head of the similar rectangular shield machine.