【摘要】：摘要：進入21世紀以來,硬巖隧道掘進機(TBM)在國民生活建設(shè)中運用得越來越廣泛,盤形滾刀作為TBM主要開挖工具,其與巖石作用機理的研究是提高滾刀破巖效率和加快TBM國產(chǎn)化進程的關(guān)鍵。論文在查閱大量國內(nèi)外文獻的基礎(chǔ)上,依據(jù)現(xiàn)有滾刀布置特點,對滾刀不同切削順序下破巖阻力和巖石破碎特征進行分析,并對滾刀布置進行優(yōu)化,主要研究內(nèi)容如下： (1)利用ANSYS/LS-DYNA軟件建立了不同滾刀切削順序數(shù)值仿真模型,研究了不同切削順序下,地質(zhì)條件、刀間距、貫入度、安裝極徑及刀盤轉(zhuǎn)速對滾刀破巖阻力的影響規(guī)律,通過正交試驗綜合分析了各因素對滾刀破巖阻力影響顯著性,并通過實驗研究驗證了數(shù)值模擬的正確性。 (2)基于PFC仿真軟件建立了不同滾刀切削順序下巖石破碎離散元數(shù)值模型,分析不同切削順序下滾刀侵入巖石裂紋擴展規(guī)律與破碎面積特征,總結(jié)并得到了三種滾刀破巖模式,分析了刀間距和貫入度對破巖模式的影響。 (3)分析滾刀破巖刀盤受力狀況,確定了滾刀優(yōu)化布置目標函數(shù)和約束條件,并利用模糊層次分析法計算目標函數(shù)權(quán)重,在此基礎(chǔ)上建立了滾刀多目標優(yōu)化布置模型,采用遺傳算法對模型進行求解得到了滾刀最優(yōu)布置參數(shù),優(yōu)化后刀盤性能獲得較大改善。
[Abstract]:Abstract: since the beginning of the 21st century, hard rock tunnel boring machine (TBM) has been used more and more widely in the construction of national life. Disc hob is the main excavating tool of TBM. The research of its interaction mechanism with rock is the key to improve the efficiency of rock breaking with hob and accelerate the process of TBM localization. On the basis of consulting a large number of domestic and foreign literatures, according to the characteristics of existing hob arrangement, the rock breaking resistance and rock breaking characteristics under different cutting sequence of hob are analyzed, and the layout of hob is optimized. The main contents are as follows: (1) the numerical simulation models of different hob cutting sequence are established by using ANSYS/LS-DYNA software, and the geological conditions, tool spacing and penetration degree under different cutting sequence are studied. The influence of installing pole diameter and rotating speed of cutter head on rock breaking resistance of hob is analyzed by orthogonal experiment, and the correctness of numerical simulation is verified by experimental research. (2) based on PFC simulation software, the discrete element numerical model of rock fracture under different cutting order is established, and the crack propagation law and fracture area characteristics of hobs invading into rock under different cutting sequence are analyzed. Three kinds of rock breaking modes of hob are summarized and obtained, and the influence of tool spacing and penetration on rock breaking mode is analyzed. (3) analyzing the force condition of hob broken cutter disc, determining the objective function and constraint condition of hob optimal layout, calculating the weight of objective function by fuzzy analytic hierarchy process, and establishing the multi-objective optimal layout model of hob, on the basis of which, the multi-objective optimal layout model of hob is established. Genetic algorithm is used to solve the model and the optimal parameters of hob placement are obtained, and the performance of the cutter head is greatly improved after optimization.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：U455.31

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