﻿ 基于数值模拟的盾构机滚刀仿真分析研究

# 基于数值模拟的盾构机滚刀仿真分析研究Simulation Analysis of Shield Machine Hob Based on Numerical Simulation

Abstract: In shield tunnel crossing engineering, shield machine tool was the key to ensure the normal con-trol part of shield tunneling, the understanding of the design theory of cutting pan and cutting tools of the shield machine, improving the adaptation to the different geological conditions, which were the problems needed to be solved urgently. In Jinling Petrochemical Material Engineering of Nanjing river crossing shield project, the highest pressure was up to 6.5 bar, the high pressure was rarely seen domestically, and the silty sand and moderately weathered gravel formations were mainly crossed in the tunneling, in which tool wearing was easily induced. According to the previous tool wear data and finite element numerical modeling analysis, a new idea of tool configuration is put forward, and the self-optimization design and adaptive modification of shield machine cutting tools are carried out and applied to engineering practice. Good results are obtained and the tunnel construction tasks are successfully completed.

1. 工程概况

2. 研究方案

3. 滚刀结构分析和工作行为分析

3.1. 滚刀工作原理

Figure 1. The working principle of hob

3.2. 滚刀的寿命计算

$\delta =0.\text{1π}K×D×N×\left(L/v\right)$ (1)

$L=\text{1}0/\left(\text{2π}R\right)×\lambda ×{P}_{\text{e}}=\left(\text{5}\lambda ×{P}_{\text{e}}\right)/\left(\text{π}R\right)$ (2)

${K}_{n}=K/{n}^{0.\text{333}}$ (3)

Table 1. The cutter wear coefficient

Table 2. The hob life calculation data

3.3. 滚刀的受力分析与建模

3.3.1. 正面滚刀受力分析与建模

Figure 2. The stress cloud diagram of the force area of the hob ring

3.3.2. 边滚刀受力分析与建模

Figure 3. The stress cloud diagram of the force area of the side hob ring

3.4. 滚刀破岩仿真

4. 结语

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[5] 张明富, 袁大军, 黄清飞, 等. 砂卵石地层盾构刀具动态磨损分析[J]. 岩石力学与工程学报, 2008, 27(2): 397-402.

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