Numerical investigation of temperature distribution on a tunnel boring machine disc cutter affected by geomechanically and excavation parameters

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Abstract

This study focuses on the thermal behavior of tunnel boring machines (TBMs) through an in-depth investigation into the temperature distribution of their disc cutters. Utilizing the differential quadrature method (DQM), the research conducts a comprehensive numerical analysis to assess the impact of excavation and geological parameters on disc cutter temperature and wear. The accuracy of the DQM model is validated against the finite difference method (FDM), demonstrating comparative results with reduced computational requirements. The findings indicate a significant correlation between disc cutter temperature and various factors, such as rotational speed, spacing, geological conditions, and material strength. Notably, increased spacing or cutter speed leads to higher temperatures and accelerated cutter wear. Moreover, geological factors, particularly rock strength, influence friction coefficients, affecting disc cutter temperatures significantly. For instance, even a slight increase in cutter spacing results in a substantial 65% rise in cutter consumption, underscoring the relevance of these findings for life cycle assessment (LCA) evaluations across diverse geological and environmental conditions in TBM operations.
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受地质力学和挖掘参数影响的隧道掘进机圆盘铣刀温度分布数值研究
本研究通过深入调查隧道掘进机(TBM)圆盘铣刀的温度分布,重点研究了隧道掘进机的热行为。研究利用微分正交法(DQM)进行了全面的数值分析,以评估挖掘和地质参数对圆盘铣刀温度和磨损的影响。DQM 模型的准确性与有限差分法(FDM)进行了对比验证,结果显示两者具有可比性,且计算要求更低。研究结果表明,圆盘铣刀温度与各种因素(如转速、间距、地质条件和材料强度)之间存在明显的相关性。值得注意的是,间距或切割器速度的增加会导致温度升高,加速切割器磨损。此外,地质因素(尤其是岩石强度)会影响摩擦系数,从而显著影响圆盘铣挖机的温度。例如,即使稍稍增加铣刀间距,也会导致铣刀消耗量大幅上升 65%,这突出表明了这些发现对于在不同地质和环境条件下进行 TBM 作业的生命周期评估(LCA)具有重要意义。
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