【摘要】：摘要：硬巖隧道掘進(jìn)機(jī)(TBM)是在水利水電、鐵路隧道等工程項(xiàng)目中得到廣泛應(yīng)用的大型工程裝備。盤(pán)形滾刀作為T(mén)BM刀盤(pán)的核心部件,其使用壽命及破巖效率已成為影響施工成本和施工效率的關(guān)鍵因素。相較于正滾刀,邊緣滾刀線速度大,破巖工況復(fù)雜,使用壽命低。本文深入分析了邊緣滾刀與巖體相互作用機(jī)理,研究了邊緣滾刀破巖特性關(guān)鍵影響因素,并提出了邊緣滾刀布置優(yōu)化方法,論文主要研究?jī)?nèi)容如下： (1)基于離散元理論建立了邊緣滾刀順次破巖數(shù)值模型,并對(duì)破巖過(guò)程中的裂紋演化過(guò)程、刀具載荷及巖石內(nèi)部應(yīng)力分布情況進(jìn)行了分析；建立了多評(píng)價(jià)指標(biāo)敏感度熵權(quán)綜合評(píng)價(jià)體系,對(duì)影響邊緣滾刀切削過(guò)程的各參數(shù)進(jìn)行了多因素敏感度分析,并得出了不同地質(zhì)條件下各因素影響程度的主次順序。 (2)以國(guó)內(nèi)某隧道所用刀盤(pán)為例,建立了不同傾角范圍下最外側(cè)邊緣滾刀切削數(shù)值模型,確定邊緣滾刀最大安裝傾角范圍；建立了雙刀順次破巖模型,通過(guò)計(jì)算雙刀之間的最優(yōu)傾角差確定了邊緣滾刀數(shù)量、安裝傾角和安裝極徑；建立了邊緣滾刀多目標(biāo)優(yōu)化布置模型,對(duì)邊緣滾刀的安裝極角進(jìn)行優(yōu)化。 (3)利用100T回轉(zhuǎn)式切削試驗(yàn)臺(tái)開(kāi)展邊緣滾刀順次破巖實(shí)驗(yàn)研究,監(jiān)測(cè)邊緣滾刀切削過(guò)程中的刀具載荷和最后巖石的破碎情況,并對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行相關(guān)分析,最終與仿真結(jié)果進(jìn)行比對(duì),驗(yàn)證了仿真方法的可靠性。
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圖片說(shuō)明：刀具破壞形式
[Abstract]:Abstract: hard rock tunnel roadheader (TBM) is a large engineering equipment which has been widely used in water conservancy and hydropower, railway tunnel and other engineering projects. As the core component of TBM cutter head, the service life and rock breaking efficiency of disc hob have become the key factors affecting the construction cost and construction efficiency. Compared with the positive hob, the line speed of the edge hob is large, the rock breaking condition is complex, and the service life is low. In this paper, the interaction mechanism between edge hob and rock mass is deeply analyzed, the key influencing factors of rock breaking characteristics of edge hob are studied, and the optimization method of edge hob arrangement is put forward. the main research contents of this paper are as follows: (1) based on discrete element theory, the numerical model of sequential rock breaking of edge hob is established, and the crack evolution process, tool load and stress distribution in rock are analyzed. The comprehensive evaluation system of sensitivity entropy weight of multi-evaluation index is established, and the multi-factor sensitivity analysis of each parameter affecting the cutting process of edge hob is carried out, and the primary and secondary order of the influence degree of each factor under different geological conditions is obtained. (2) taking the cutter head used in a tunnel in China as an example, the numerical model of the outermost edge hob cutting under different inclination angles is established, and the maximum installation inclination angle range of the edge hob is determined, and the rock breaking model of the double knife is established, and the number of edge hob, installation inclination angle and installation pole diameter are determined by calculating the optimal inclination difference between the two knives. The multi-objective optimal arrangement model of edge hob is established, and the installation pole angle of edge hob is optimized. (3) the 100T rotary cutting test bed is used to carry out the experimental study of edge hob rock breaking in order to monitor the tool load and the final rock breakage in the cutting process of edge hob, and the correlation analysis of the experimental results is carried out. Finally, the reliability of the simulation method is verified by comparing the experimental results with the simulation results.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：U455.31

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