A Mechanical Model to Estimate the Disc Cutter Wear of Tunnel Boring Machines
A Mechanical Model to Estimate the Disc Cutter Wear of Tunnel Boring Machines
复制标题
估算隧道掘进机圆盘滚刀磨损的机械模型
DOI：
10.1166/asl.2011.1604
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发表时间：
2011-07
影响因子：
--
通讯作者：
Cai, Zongxi
中科院分区：
文献类型：
--
作者：
Wang, Lihui;Qu, Chuanyong;Kang, Yilan;Su, Cuixia;Wang, Yanqun;Cai, Zongxi
在硬岩巷道掘进过程中，对掘进机刀具磨损进行实时监测是非常重要和必要的。基于切削系数（CC）与贯入度（p）之间的关系，建立了隧道掘进机等截面盘形刀具磨损的力学模型。为了得到这一关系，利用ABAQUS软件对等截面盘形刀具在破碎硬岩时与硬岩的相互作用进行了分析和模拟。结果表明，刀具与硬岩接触面上的接触应力近似呈抛物线分布。根据这一抛物线分布，推导出切削系数CC与针入度p之间的关系。最后提出了刀具磨损的估算模型，为隧道掘进机刀具磨损状况的预测提供了一种新的方法。
Real-time monitoring the cutter wear of tunnel boring machines is very important and necessary when tunnel boring machines are excavating tunnels in hard rock mass. In this study, a mechanical model to estimate the constant cross section disc cutter wear of tunnel boring machines is established based on the relation between the cutting coefficient (CC) and the penetration (p). In order to obtain this relation, the interaction between constant section disc cutters and hard rocks is analyzed and simulated using ABAQUS software when cutters are breaking the hard rocks. As a result, the approximate parabola distribution of the contact stress on the contact surface between cutters and hard rocks is assumed and confirmed. In terms of this parabola distribution, the relation between the cutting coefficient (CC) and the penetration (p) is deduced. Finally the estimation model of cutter wear is presented and a new method is provided to predict the cutters wear condition of tunnel boring machines.