摘要：Geological adaptability matching design of a disc cutter is the prerequisite of cutter head design for tunnel boring machines(TBMs)and plays an important role in improving the tunneling efficiency of *** main purpose of the cutter matching design is to evaluate the cutter performance and select the appropriate cutter *** this paper,a novel evaluation method based on multicriteria decision making(MCDM)techniques was developed to help TBM designers in the process of determining the cutter *** analytic hierarchy process(AHP)and matter element analysis were applied to obtaining the weights of the cutter evaluation criteria,and the fuzzy comprehensive evaluation and technique for order performance by similarity to ideal solution(TOPSIS)approaches were employed to determine the ranking of the cutters.A case application was offered to illustrate and validate the proposed *** results of the project case demonstrate that this method is reasonable and feasible for disc cutter size selection in cutter head design.

摘要：根据目前常见复合式土压平衡盾构的结构特性,以刀盘开口特征为依据,对复合式土压平衡盾构进行分类并归纳出2种类型滚刀布置区域,建立其约束模型。通过分析盾构掘进时滚刀的受力情况,提出滚刀布置基本原则,在此基础上建立以滚刀极径与极角为设计变量的非线性多目标滚刀布置优化模型,分析模型的目标函数与约束条件,给出模型求解策略,并采用遗传算法求解得到滚刀布置参数。应用该优化设计方法对深圳地铁某施工标段所用盾构滚刀进行布置优化。研究结果表明:优化后刀盘的径向不平衡力下降10.1%,倾覆力矩下降9.4%,破岩量方差下降15.9%,表明所建立的数学模型及所使用的优化算法是正确、可行的。

摘要：在研发某型号盾构管片拼装机的过程中,为了避免管片拼装机关键部件在运动过程中受力过大断裂造成重大工程事故,应用多体动力学仿真软件,建立整个管片拼装机的动力学仿真模型,对管片拼装机不同安装位置的管片拼装过程进行动力学研究。仿真得到了整个动作过程中关键部件举重钳-扼架在不同工况下的动态载荷与响应特性,并以得到的扼架铰接处的最大动载为边界条件,建立静力学模型。利用Ansys-Workbench对扼架最大受力情况进行有限元分析,分析得到了最大应力为123.24 MPa,确保了管片拼装机扼架部分的强度,仿真分析结果最后通过现场测试得到了验证。

摘要：在结合盾构刀盘构型、开口和刀具布置规律等理论基础上,以三维软件SolidWorks为开发平台,以VisualBasic作为开发工具,开发了一种复合式土压平衡盾构刀盘CAD系统。该CAD系统采用编程法与尺寸驱动法两种开发方式,设计了刀盘选型模块、开口设计模块、刀具选型模块和刀具布置模块等八个模块,实现对复合式土压平衡盾构刀盘、刀具进行三维参数化优化设计。针对某地铁施工工程需求,应用所开发的复合式土压平衡盾构刀盘CAD系统,设计了直径6.28m,开口率为32%,装配有滚刀35把,正面刮刀40把,边缘刮刀8把的刀盘。

摘要：In order to improve the strength and stiffness of shield cutterhead, the method of fuzzy mathematics theory in combination with the finite element analysis is adopted. An optimal design model of structural parameters for shield cutterhead is formulated,based on the complex engineering technical requirements. In the model, as the objective function of the model is a composite function of the strength and stiffness, the response surface method is applied to formulate the approximate function of objective function in order to reduce the solution scale of optimal problem. A multi-objective genetic algorithm is used to solve the cutterhead structure design problem and the change rule of the stress-strain with various structural parameters as well as their optimal values were researched under specific geological conditions. The results show that compared with original cutterhead structure scheme, the obtained optimal scheme of the cutterhead structure can greatly improve the strength and stiffness of the cutterhead, which can be seen from the reduction of its maximum equivalent stress by 21.2%, that of its maximum deformation by 0.75%, and that of its mass by 1.04%.