盾构推进系统突变载荷顺应特性研究  

Compliance characteristics of propulsion system of shield tunneling machine under sudden load

作　　者：侯典清[1] 龚国芳[1] 施虎[1] 王林涛[1] 

机构地区：[1]浙江大学流体动力与机电系统国家重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2013年第3期522-527,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家"973"重点基础研究发展规划资助项目(2007CB714004);国家自然科学基金资助项目(50975252)

摘　　要：针对盾构掘进过程中地质复杂多变、易出现大偏载及突变载荷的情况,提出了盾构推进系统顺应性概念及其评价指标,并基于对推进系统的参数化分析建立了顺应性计算模型,以某国产3.2m盾构实验样机为例计算了推进系统顺应性.在Matlab/Simulink仿真环境中,根据顺应性模型对调速溢流模式、减压大分区溢流模式、减压小分区溢流模式、减压主路溢流模式4种不同型式盾构推进系统进行了顺应性计算.为了验证盾构推进系统顺应效果,以某地铁工程遇到的实际负载为标准对4种盾构推进系统进行了顺应性效果评价分析.顺应性计算结果和顺应效果评价均表明:在同一突变载荷下4种不同型式盾构推进系统顺应性存在较大差别,顺应性与推进系统溢流元件、分区方式、工作参数、管道布置有关.推进液压系统顺应性可以作为衡量盾构承受外界突变载荷能力的指标,为新一代盾构推进系统研发设计提供了顺应性设计原则和优化目标.Considering the complexity and changeability of geology and prone to large unbalanced and sudden loads during shield excavation,the concept and evaluation index of compliance of shield propulsion system was proposed.The calculation model of compliance was established based on parameterization analysis of propulsion system,then the compliance of propulsion system was calculated taking a certain 3.2 m domestic shield prototype for example.Compliance of four different types of shield propulsion system,including speed regulation and overflow mode,reduced pressure combined with large grouping overflow mode,reduced pressure combined with tiny grouping overflow mode and reduced pressure combined with main oil way overflow mode,was calculated under Matlab/Simulink simulation environment.In order to verify the compliance effect of shield propulsion system,evaluation and analysis of the compliance effect were carried out based on the actual loads met in a certain domestic metro engineering.The calculation results of the compliance and the evaluation of compliance effect both indicated that big differences existed in compliance among these four typical shields under the same sudden load,and the compliance was related to relief component,grouping pattern,working parameters and pipe layout of propulsion system.Therefore,the compliance of propulsion hydraulic system can be regarded as an index weighing the capacity that shield sustaining external sudden load,providing the compliance design philosophy and optimization objective for the new generation shield propulsion system.

关 键 词：盾构 推进系统 突变载荷 顺应特性 顺应性评价指标 

分 类 号：TH137[机械工程—机械制造及自动化]