海底天然气水合物绞吸式开采绞刀切削力特性
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摘要
根据绞刀头结构和工作原理以及天然气水合物沉积物的物理特性,建立切削天然气水合物沉积物的有限元模型,运用ANSYS/LS-DYNA仿真软件和Drucker-Prager材料模型模拟绞刀切削海底天然气水合物沉积物的过程,分析绞刀切削过程沿水平、竖直和转轴方向的受力特点,仿真分析绞刀横移速率、转速、下放角和切削区间角对切削力的影响规律。结果表明,增大横移速率会导致绞刀三个方向受力明显增大;转速提高会降低绞刀三个方向的切削力,随着转速增加,绞刀切削力的减小趋于平缓;绞刀下放角的增大会使绞刀轴向受力急剧增加,影响采矿车工作平稳性;随着切削区间角的增大,绞刀X轴方向力先增大后减小,工作时采用较大的切削区间角,可提高切削效率和采矿车工作稳定性。
The finite element model for cutting natural gas hydrate sediments was established according to the structure and working principle for the cutter head and the physical properties of the gas hydrate sediments.ANSYS/LS-DYNA simulation software and the Drucker-Prager material model were used to simulate the cuttings of the gas Hydrate sediment,and analyse the stress characteristics of the cutter in horizontal direction,vertical direction and rotation direction during the cutting process.The main working parameters,such as traverse rate,rotational speed,down angle and cutting interval angle was simulated.The results show that increasing the traverse rate will increase the force in the three directions of the cutter.The increase of the rotational speed will reduce the cutting force,but the reduction rate of the cutting force decreases with the increase of the rotational speed.The increase of the cutter angle will increase the axial force of the cutter and affect the smoothness of the mining truck.With the increase of the cutting interval angle,the X-axis force increases first and then decreases.Using a larger cutting interval angle can improve the cutting efficiency and the stability of mining vehicles.
The finite element model for cutting natural gas hydrate sediments was established according to the structure and working principle for the cutter head and the physical properties of the gas hydrate sediments.ANSYS/LS-DYNA simulation software and the Drucker-Prager material model were used to simulate the cuttings of the gas Hydrate sediment,and analyse the stress characteristics of the cutter in horizontal direction,vertical direction and rotation direction during the cutting process.The main working parameters,such as traverse rate,rotational speed,down angle and cutting interval angle was simulated.The results show that increasing the traverse rate will increase the force in the three directions of the cutter.The increase of the rotational speed will reduce the cutting force,but the reduction rate of the cutting force decreases with the increase of the rotational speed.The increase of the cutter angle will increase the axial force of the cutter and affect the smoothness of the mining truck.With the increase of the cutting interval angle,the X-axis force increases first and then decreases.Using a larger cutting interval angle can improve the cutting efficiency and the stability of mining vehicles.
引文
[1] Misyura S Y.Effect of heat transfer on the kinetics of methane hydrate dissociation[J].Chemical Physics Letters,2013,583:34-37.
[2] Mohebbi V,Behbahani R M.Experimental study on gas hydrate formation from natural gas mixture[J].Journal of Natural Gas Science and Engineering,2014,18:47-52.
[3] 孙建业.海洋沉积物中天然气水合物开采实验研究[D].中国海洋大学,2011.(SUN Jian-ye.Experimental Research of Gas Hydrates Exploitation in Marine Sediments[D].Ocean University of China,2011.(in Chinese))
[4] Yuan Q,Sun C Y,Liu B,et al.Methane recovery from natural gas hydrate in porous sediment using pressu-rized liquid CO2[J].Energy Conversion and Management,2013,67:257-264.
[5] 欧阳义平.岩石疏浚用刀齿的切削机理研究[D].上海 交通大学,2013.(OUYANG Yi-ping.Studies on Cutting Mechanism of Pick Cutters for Rock Dredging[D].Shanghai Jiao Tong University,2013.(in Chinese))
[6] 陈晓华.大型绞吸挖泥船挖岩绞刀切削力计算分析[D].上海交通大学,2012.(CHEN Xiao -hua.Analysis of Rock Cutting for Large -sized Cutter Suction Dredger[D].Shanghai Jiao Tong University,2012.(in Chinese))
[7] 张德新.基于二维切削理论的绞刀切削载荷计算及绞刀应力状态的ANSYS分析[D].河海大学,2007.(ZHANG De -xin.Cutting Force Calcuiation Based on 2-D Soil-Cutting Theory and the Stress Analysis of Cutterhead by ANSYS[D].Ho Hai University,2007.(in Chinese))
[8] Yu B,Khair A W.Numerical modeling of rock ridge breakage in rotary cutting [A].ARMA General Meeting [C].Canada,2007.
[9] 王维,彭枧明,王红岩,等.天然气水合物地层PCS取样扰动有限元仿真分析[J].中南大学学报(自然科学版),2014,45(4):1183-1189.(WANG Wei,PENG Jian-ming,WANG Hong-yan,et al.FEM simulation analysis of sampling disturbance with PCS drill bit in gas-hydrate-bearing stratum [J].Journal of Central South University(Science and Technology),2014,45(4):1183-1189.(in Chinese))
[10] 杨宇江,李元辉.数值岩石试样破裂过程多重分形特征[J].计算力学学报,2016,33(5):796-801.(YANG Yu-jiang,LI Yuan-hui.Multi-fractal spectra characteristics of numerical rock specimen during the fracture[J].Chinese Journal of Computational Mecha-nics,2016,33(5):796-801.(in Chinese))
[11] 金浏,杜修力,黄景琦.多轴加载下混凝土细观破坏模拟的强度准则探讨[J].计算力学学报,2015,32(3):322-331.(JIN Liu,DU Xiu-li,HUANG Jing-qi.Discussion on strength criterion used in the meso -failure of concrete under multi-axial loading conditions[J].Chinese Journal of Computational Mecha-nics,2015,32(3):322-331.(in Chinese))
[12] 刘乐乐,张旭辉,刘昌岭,等.含水合物沉积物三轴剪切试验与损伤统计分析[J].力学学报,2016,48(3):720-729.(LIU Le -le,ZHANG Xu-hui,LIU Chang-ling,et al.Triaxial shear tests and statistical analyses of damage for methane hydrate -bearing sediments[J].Chinese Journal of Theoretical and Applied Mechanics,2016,48(3):720-729.(in Chinese))
[13] 孙晓杰.天然气水合物地层物理力学性质实验研究[D].中国石油大学,2011.(SUN Xiao -jie.Physical and Mechanical Properties Research on Natural Gas Hydrate Bearing Sediments[D].China University of Petroleum,2011.(in Chinese))
[14] 疏浚工程手册编委会.疏浚工程手册[M].上海:交通部上海航道局,1994.(Editorial Board of Dredging Engineering Handbook.Dredging Engineering Hand-book[M].Shanghai:Shanghai Navigation Bureau of the Ministry of Communications,1994.(in Chinese))
[15] 谢秋敏.海底天然气水合物绞吸式开采管道水力输送规律研究[D].中南大学,2014.(XIE Qiu-min.Research of Seabed Gas Hydrate Cutter Suction Cutting Pipe Hydraulic Transportation Law[D].Central South University,2014.(in Chinese))
[2] Mohebbi V,Behbahani R M.Experimental study on gas hydrate formation from natural gas mixture[J].Journal of Natural Gas Science and Engineering,2014,18:47-52.
[3] 孙建业.海洋沉积物中天然气水合物开采实验研究[D].中国海洋大学,2011.(SUN Jian-ye.Experimental Research of Gas Hydrates Exploitation in Marine Sediments[D].Ocean University of China,2011.(in Chinese))
[4] Yuan Q,Sun C Y,Liu B,et al.Methane recovery from natural gas hydrate in porous sediment using pressu-rized liquid CO2[J].Energy Conversion and Management,2013,67:257-264.
[5] 欧阳义平.岩石疏浚用刀齿的切削机理研究[D].上海 交通大学,2013.(OUYANG Yi-ping.Studies on Cutting Mechanism of Pick Cutters for Rock Dredging[D].Shanghai Jiao Tong University,2013.(in Chinese))
[6] 陈晓华.大型绞吸挖泥船挖岩绞刀切削力计算分析[D].上海交通大学,2012.(CHEN Xiao -hua.Analysis of Rock Cutting for Large -sized Cutter Suction Dredger[D].Shanghai Jiao Tong University,2012.(in Chinese))
[7] 张德新.基于二维切削理论的绞刀切削载荷计算及绞刀应力状态的ANSYS分析[D].河海大学,2007.(ZHANG De -xin.Cutting Force Calcuiation Based on 2-D Soil-Cutting Theory and the Stress Analysis of Cutterhead by ANSYS[D].Ho Hai University,2007.(in Chinese))
[8] Yu B,Khair A W.Numerical modeling of rock ridge breakage in rotary cutting [A].ARMA General Meeting [C].Canada,2007.
[9] 王维,彭枧明,王红岩,等.天然气水合物地层PCS取样扰动有限元仿真分析[J].中南大学学报(自然科学版),2014,45(4):1183-1189.(WANG Wei,PENG Jian-ming,WANG Hong-yan,et al.FEM simulation analysis of sampling disturbance with PCS drill bit in gas-hydrate-bearing stratum [J].Journal of Central South University(Science and Technology),2014,45(4):1183-1189.(in Chinese))
[10] 杨宇江,李元辉.数值岩石试样破裂过程多重分形特征[J].计算力学学报,2016,33(5):796-801.(YANG Yu-jiang,LI Yuan-hui.Multi-fractal spectra characteristics of numerical rock specimen during the fracture[J].Chinese Journal of Computational Mecha-nics,2016,33(5):796-801.(in Chinese))
[11] 金浏,杜修力,黄景琦.多轴加载下混凝土细观破坏模拟的强度准则探讨[J].计算力学学报,2015,32(3):322-331.(JIN Liu,DU Xiu-li,HUANG Jing-qi.Discussion on strength criterion used in the meso -failure of concrete under multi-axial loading conditions[J].Chinese Journal of Computational Mecha-nics,2015,32(3):322-331.(in Chinese))
[12] 刘乐乐,张旭辉,刘昌岭,等.含水合物沉积物三轴剪切试验与损伤统计分析[J].力学学报,2016,48(3):720-729.(LIU Le -le,ZHANG Xu-hui,LIU Chang-ling,et al.Triaxial shear tests and statistical analyses of damage for methane hydrate -bearing sediments[J].Chinese Journal of Theoretical and Applied Mechanics,2016,48(3):720-729.(in Chinese))
[13] 孙晓杰.天然气水合物地层物理力学性质实验研究[D].中国石油大学,2011.(SUN Xiao -jie.Physical and Mechanical Properties Research on Natural Gas Hydrate Bearing Sediments[D].China University of Petroleum,2011.(in Chinese))
[14] 疏浚工程手册编委会.疏浚工程手册[M].上海:交通部上海航道局,1994.(Editorial Board of Dredging Engineering Handbook.Dredging Engineering Hand-book[M].Shanghai:Shanghai Navigation Bureau of the Ministry of Communications,1994.(in Chinese))
[15] 谢秋敏.海底天然气水合物绞吸式开采管道水力输送规律研究[D].中南大学,2014.(XIE Qiu-min.Research of Seabed Gas Hydrate Cutter Suction Cutting Pipe Hydraulic Transportation Law[D].Central South University,2014.(in Chinese))