盾构机刀盘的力学分析与优化设计  

The Mechanical Analysis and Optimal Design Support Ribs of Full-Face Tbm Based on Dalian Subway Project

作　　者：霍军周[1] 蔡宝[1] 王亚杰[1] 欧阳湘宇 

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《机械设计与制造》2014年第10期57-60,共4页Machinery Design & Manufacture

基　　金：国家青年自然科学基金项目(51005033;51375001);973项目(2013CB035400);辽宁省科技攻关项目(2011220031);中央高校基本科研业务费专项项目(DUT13LK14)

摘　　要：复合型盾构机能同时切削软土和硬岩的特性使得复合型盾构机被广泛应用。刀盘作为复合型盾构机的关键部件,其应力分布是否合理,工作时是否发生共振,都是刀盘是否工作在安全范围内的关键。以大连刀盘为基础,分析了两种工况下刀盘的应力分布和最大变形,同时还考虑了刀盘可能会发生共振,对刀盘进行模态分析和谐响应分析,模态分析得到了刀盘的固有频率和前10阶振型图,谐响应分析得到了刀盘两处幅值最大的危险点。进而基于workbench平台建立了以刀盘强度和刚度为优化目标的刀盘支撑筋布置优化设计模型,获得了刀盘强度刚度与刀盘支撑筋位置之间的映射关系,采用多目标优化方法进行了有效求解,得到了等效应力和变形最小时的最优支撑筋截面直径参数。Functional composite shield can cut characteristics of soft soil and hard rock so that it is widely used. As a key component of complex shield machine, whether the stress distribution of cutter is reasonable, whether the work resonance, are the keys of cutter working in the safe range. It is based on Dalian cutter, analyzing two kinds of conditions cutterhead stress distribution and maximum defornmtiong It also takes into account the resonance that cutterhead may occur, so cutterhead modal analysis and harmonic response analysis is also done. Modal analysis got natural frequencies and 10 mode shapes, harmonic response analysis get two largest magnitude cutter danger point. Finally, it establishes a cutter strength and stiffness as the optimization objective of the cutter support ribs layout optimization design model which is based on workbench platform, obtaines mapping between cutter stiffness and the position of the cutter support ribs, using multi-objective optimization methods to solve this problem, getting the optimal support ribs sectional diameter when equivalent stress and deformation are at the least.

关 键 词：复合式盾构机 刀盘 模态 谐响应 支撑筋 

分 类 号：TH16[机械工程—机械制造及自动化]