TBM刀盘分体结构参数化优化设计方法

Structural Optimization Method for Block of TBM Cutterhead

为了寻找全断面岩石掘进机(TBM)刀盘分体最优的设计参数,文章采用了一种分体结构参数化优化设计方法。首先,考虑了分体在刀盘系统中的耦合关系,建立TBM刀盘系统多自由度耦合动力学模型,并对模型求解得到各分体的各向振动响应,通过对4个分体的响应进行分析比较得到振动稳定性最差的分体结构,并对其进行有限元分析,将仿真结果进行参数化,得到加载时分体相应的结构尺寸数据、总体变形数据。最后,进行Pearson相关分析提取主要影响参数,通过数值分析得到各主要参数的最优参数区间,由此得出结论:①当考虑刀盘各分体与中心体的耦合关系时,分体轴向振动位移幅度最大;②前后面板间距和筋板厚度对分体的变形和稳定性影响较大;③当前后面板间距与刀盘直径的比值在19.4%~19.7%范围内,且筋板厚度与刀盘直径比值在0.6%~0.79%范围内时,刀盘分体结构变形最小,稳定性最好,为刀盘分体的结构设计和优化提供了有效的理论依据。

In order to find the optimum design parameters of the cutterhead block of the tunnel boring machine (TBM), a optimization method of block structure parameter is adopted in this paper. Firstly, considering the coupling relationship of the block in the cutterhead system, a multi-degree-of-freedom coupling dynamic model of the TBM cutterhead system is established. The vibration responses of each direction are obtained by solving the model, and the block with the worst vibration stability are obtained by analyzing and comparing the responses of the four blocks. Then, it is subjected to finite element analysis, and the simulation results are parameterized to obtain the corresponding structural size data and overall deformation data under loading. Finally, Pearson correlation analysis is used to extract the main influencing parameters, and numerical analysis is carried out to obtain the optimal parameter intervals of the main parameters. We draw the following conclusions:①When considering the coupling relationship between the block and the center block of the cutterhead, axial vibration displacement amplitude of block is the largest;② The spacing between front and rear panels and the thickness of the stiffened panel have a great influence on the deformation and stability of the block;③When the ratio of the spacing between front and rear panels to the diameter of the cutterhead is in the range of 19.4%~19.7%, and the ratio of the thickness of the stiffened panel to the diameter of the cutterhead is in the range of 0.6%~0.79%, the structure of the block has the smallest deformation and the best stability. This provides an effective theoretical basis for the structural design and optimization of the cutterhead block.