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Static and Dynamic FEM Analyses and Optimization of a Mix-Shield Cutterhead
(1 School of Geoscience and Info-Physics, Central South University, Changsha 410083; 2 Chian Railway 16th Bureau Group Co. Ltd., Beijing 101100; 3 School of Mechanical Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050043)
Abstract The study of force conditions of shield cutterheads can provide a basis for shield type selection as well as the optimal design of cutterheads. Based on the analysis of the force conditions of a shield cutterhead, a static analysis on the cutterhead of a large-diameter shield used in Dongguan city was performed using ANSYS and the stress and deformation of the shield cutterhead in mixed ground were obtained. The vibration performance of the cutterhead was obtained by a modal analysis, and theforce condition of the cutterhead was improved by optimization of the cutterhead structure. The results show that: 1) the maximum stress of this shield cutterhead is 251 MPa during shield construction in mixed ground, which is smaller than the yield limit of 345 MPa; 2) the inherent frequencies of the cutterhead at the first six orders range from 38.803 Hz to 64.842 Hz; and 3) it satisfies the requirements of strength and stiffness, thereby achieving ground settlement control and safety during the tunneling process.
Abstract：
The study of force conditions of shield cutterheads can provide a basis for shield type selection as well as the optimal design of cutterheads. Based on the analysis of the force conditions of a shield cutterhead, a static analysis on the cutterhead of a large-diameter shield used in Dongguan city was performed using ANSYS and the stress and deformation of the shield cutterhead in mixed ground were obtained. The vibration performance of the cutterhead was obtained by a modal analysis, and theforce condition of the cutterhead was improved by optimization of the cutterhead structure. The results show that: 1) the maximum stress of this shield cutterhead is 251 MPa during shield construction in mixed ground, which is smaller than the yield limit of 345 MPa; 2) the inherent frequencies of the cutterhead at the first six orders range from 38.803 Hz to 64.842 Hz; and 3) it satisfies the requirements of strength and stiffness, thereby achieving ground settlement control and safety during the tunneling process.
ZHOU Yang-Zong-1,
2 ,
NIE Yu-Fei-3 etc
.Static and Dynamic FEM Analyses and Optimization of a Mix-Shield Cutterhead[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(3): 144-149
2015, Vol. 52 