摘要
选用人工合成的膨润土水合物力学参数,以Drucker-Prager准则作为水合物沉积物的本构模型,通过模拟3轴压缩试验来验证材料正确性。建立单齿切削水合物的三维仿真模型,通过切削试验来验证仿真模型正确性,分析了围压对水合物沉积物破碎形式的影响,以及围压、切削深度和侧倾角对单齿切向力以及破碎比功的影响。仿真结果表明:围压的存在导致破碎过程中的挤压破碎区增大,水合物切屑变小,切向力与破碎比功显著增大;切向力与破碎比功随围压的增加而增大,但增大幅度逐渐变小;切向力随切削深度增大而增加,同时增加幅度逐渐增大,比功随切削深度的增大而逐渐减小,同时减少幅度逐渐减小。该研究结果可为绞吸式机械破碎单齿设计与开采制定提供参考依据。
In the process of mechanical mining with marine hydrate solid-state fluidization cutter suction,it is important to determine the influence of the single tooth crushing parameters on the fracture.This paper selected mechanical parameters of the synthetic bentonite hydrate,and took the Drucker-Prager criterion as the constitutive model of the hydrate.Correctness of the material was verified through the three-axis simulation.A three-dimensional model of the single tooth cutting hydrate was established,and correctness of the model was verified through the cutting experiment.Influence of confining pressure on the hydrate breaking form was analyzed,while influence of the confining pressure,cutting depth and side angle on the tangential force of the single tooth and mechanical specific energy(MSE)was investigated.Simulation results show that the existence of confining pressure results in the increase of the crushing area,the decrease of the volume of hydrate chips,and the increase of tangential force and MSE.Tangential force and MSE increase with the increase of confining pressure,but the increase is gradually decreasing.Tangential force increases with the increase of the depth of cutting,but the increase is gradually decreasing.MSE decreases with the increase of the depth of cutting gradually,but the increase is gradually decreasing.This study lays a reference for the design of mechanical crushing with a single tooth of cutter suction.
作者
王凡
王国荣
钟林
贺湘伟
WANG Fan;WANG Guorong;ZHONG Lin;HE Xiangwei(College of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Institute of Energy Equipment,Southwest Petroleum University,Chengdu 610500,China;Key Laboratory of Oil and Gas Equipment,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,China;Zhuzhou Times New Material Technology Co.,Ltd.,Zhuzhou 412000,China)
出处
《中国造船》
EI
CSCD
北大核心
2020年第4期245-254,共10页
Shipbuilding of China
关键词
天然气水合物
模拟仿真
绞吸式单齿破碎
围压
NGS
finite element simulation
cutter suction single tooth crushing
confining pressure
