發(fā)布時間：2018-03-10 13:26

  本文選題：TBM　切入點(diǎn)：再制造刀盤　出處：《河北工程大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著國內(nèi)大中城市軌道交通建設(shè)飛速發(fā)展,地下隧道工程已進(jìn)入高速發(fā)展期,我國已成為全球掘進(jìn)裝備需求量最多的國家。國內(nèi)盾構(gòu)技術(shù)也在不斷提升,現(xiàn)有的硬巖掘進(jìn)機(jī)(TBM)已近百臺,其中2011年前已有35臺,雖數(shù)量看似不少,但是大部分TBM已接近服役期限,若直接報(bào)廢將帶來巨大的資源浪費(fèi)。刀盤處于TBM最前沿,與巖土直接接觸,是影響TBM掘進(jìn)效率最重要的部件。為解決國內(nèi)大量TBM刀盤未能全壽命使用,以及再制造刀盤損傷機(jī)理研究等相關(guān)問題。通過閱讀國內(nèi)外文獻(xiàn),本文開展了TBM刀盤結(jié)構(gòu)分析、宏觀、微觀及多元損傷方向的研究,對于提高已服役刀盤利用率、延長其服役壽命、降低成本具有重要意義。主要研究內(nèi)容如下:(1)介紹了TBM刀盤結(jié)構(gòu)類型,分析影響刀盤掘進(jìn)性的主要參數(shù);針對中方五分式TBM刀盤進(jìn)行關(guān)鍵掘進(jìn)參數(shù)的力學(xué)分析;建立典型TBM刀盤三維模型,應(yīng)用ABAQUS有限元分析得到刀盤易發(fā)生損傷缺陷區(qū)域;(2)TBM刀盤常見宏觀損傷(裂紋、變形、蠕變、焊縫開裂及疲勞損傷)的機(jī)理深入研究;針對刀盤單一宏觀損傷構(gòu)建典型刀盤損傷分析模型并推導(dǎo)了刀盤損傷程度計(jì)算方法;同時,分析對比了常見的損傷檢測方法;(3)研究了細(xì)觀力學(xué)知識、基因理論、金屬微觀損傷等先進(jìn)模型,結(jié)合刀盤細(xì)小裂紋尖端應(yīng)力分析探討了TBM刀盤微觀損傷相關(guān)研究。從細(xì)觀力學(xué)角度,分析GTN本構(gòu)模型,建立與刀盤損傷研究的聯(lián)系;通過基因理論將刀盤損傷標(biāo)記,遺傳算法討論刀盤損傷演變;推導(dǎo)刀盤在循環(huán)載荷下微觀損傷裂紋萌生和裂紋尖端應(yīng)力與循環(huán)次數(shù)的關(guān)系式;(4)創(chuàng)造性的提出再制造刀盤多元損傷耦合研究框架;主要從線性耦合和非線性耦合兩方面簡要分析了典型刀盤損傷耦合的關(guān)聯(lián)影響因素和所涉及的相關(guān)模型方法的關(guān)系。為下一步再制造刀盤的多元損傷耦合整體模型研究、再制造刀盤剩余壽命預(yù)測和刀盤再制造評價做基礎(chǔ)。
[Abstract]:With the rapid development of rail transit construction in large and medium-sized cities in China, the underground tunnel project has entered a period of rapid development, and China has become the country with the most demand for tunneling equipment in the world. The existing hard rock tunneling machines (TBMs) have nearly 100 units, of which 35 were before 2011. Although the number seems to be quite large, most of the TBM are close to service term. If scrapped directly, it will bring a huge waste of resources. The cutterhead is at the forefront of the TBM. Direct contact with rock and soil is the most important component affecting the efficiency of TBM tunneling. In order to solve the problems related to the failure of domestic TBM cutters to be used all over the life, and to study the damage mechanism of remanufacturing cutters, and so on, this paper has read the literature at home and abroad. In this paper, the structural analysis, macroscopical, microscopic and multivariate damage direction of TBM cutters have been studied, which can improve the utilization ratio of used cutters and prolong their service life. The main research contents are as follows: 1) introduce the structure type of TBM cutter head, analyze the main parameters that affect the heading of the cutter head, carry out the mechanical analysis of key driving parameters for the Chinese five-point TBM cutter head, and make a mechanical analysis of the key driving parameters for the five-point TBM cutter head of the Chinese side. Three dimensional model of typical TBM cutter head is established, and the mechanism of common macroscopic damage (crack, deformation, creep, weld crack and fatigue damage) of cutter head is obtained by ABAQUS finite element analysis. Aiming at the single macro damage of the cutter head, the damage analysis model of the typical cutter head is constructed and the method of calculating the damage degree of the cutter head is deduced. At the same time, the micromechanics knowledge and gene theory are studied and compared with the common damage detection method. Based on the advanced models of metal microscopic damage and the stress analysis of the tip of small crack of the cutter head, the research on the microscopic damage of the TBM cutter head is discussed. From the viewpoint of meso-mechanics, the constitutive model of GTN is analyzed, and the relation between the damage research of the cutter head and the damage of the cutter head is established. Genetic algorithm is used to discuss the evolution of cutter head damage. The relationship between crack initiation and crack tip stress under cyclic loading and the relationship between crack tip stress and cycle number are derived. In this paper, the relationship between the related factors of damage coupling of typical cutters and the related model methods is briefly analyzed from the two aspects of linear coupling and nonlinear coupling. The prediction of residual life of the remanufacturing cutter head and the evaluation of the remanufacture of the cutter head are the basis.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U455.39

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本文編號：1593535