摘要
基于子模型方法与任意拉格朗日-欧拉有限元方法(ALE),建立了盾构机刀盘掘削过程的三维数值模型.在保证计算精度的前提下,实现了模型缩减、ALE网格精细化、地应力场初始化.通过将计算结果与某模型盾构机掘进试验的实测数据对比,验证了该方法的正确性与准确性.研究结果表明:基于ALE方法的盾构机刀盘掘削数值模型可以准确模拟土体破坏、脱离过程;基于子模型方法得到的初始应力场准确反映了原土层的地应力场,得到了地应力场对刀盘受力的影响关系.
A 3D finite element model for cutterhead-soil interaction in shield tunneling was established by combination using of submodeling and arbitrary Lagrangian-Eulerian （ALE） method. Model reduction, submodel mesh refinement and soil stress state initialization were realized. The proposed models and method were verified by comparing the computation results with monitored data from model test. It is showed that the ALE method catches the soil failure and the submodeling accurately reestablishes the in situ stress state of soil. The impact of geostress on the blade of cutterhead was also investigated.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2009年第6期1017-1020,共4页
Journal of Shanghai Jiaotong University
基金
上海市科委重大科技攻关项目(04dz12017)
关键词
子模型方法
任意拉格朗日-欧拉方法
盾构机
刀盘
submodeling
arbitrary Lagrangian Eulerian （ALE）
tunnel boring machine （TBM）
cutterhead
