期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2016
卷号：13
期号：5
出版社：IJCSI Press
摘要：In order to improve the cutting performance of shield machine disc cutters (short for cutters), penetration depth (denoted as p) and cutting spacing (denoted as s) were selected as key optimization parameters. Cutting forces and the area of crushing pits were used as performance indices. To analyze the influence of the parameters on the cutting performance of the cutters, a three-dimensional finite element model was established which was verified by a well-known theoretical model. Using this model, the rock-cutting processes in relieved (double-cutter-cutting) and unrelieved (single-cutter-cutting) modes were numerically simulated to get the cutting forces and the area of crushing pits. The regression equation based on these key parameters was built. The research shows that increasing penetration depth would help improve the work ratio done by the rolling force but may cause greater vibration and impact when the cutters are being used in the unrelieved mode. With the increasing of the penetration depth, the area of crushing pits rises. In relieved mode, when s/p is smaller than 10, the forces of cutters and the area of crushing pits rapidly increase with the increasing of cutting spacing. In this case, increasing cutting spacing is a good choice for better cutting efficiency. However, when s/p is greater than 10 and less than 16, the area of crushing pits decrease and the rolling force is no longer sensitive to the increasing of cutting spacing. When s/p is greater than 16, the cutting spacing has little influence on the area of crushing pits.
