新型三轴高强井壁实验加载装置的研制
发布时间：2018-12-15 01:09
【摘要】：钻井技术在煤矿行业的不断进步下也不断地创新和发展,其中井壁结构的稳定性一直是科研人员探讨的热门话题。为了研究井壁结构与土层及地下水之间相互作用的力学性能,需要借助三轴高强井壁实验加载装置来进行模拟实验。三轴高强井壁实验加载装置是通过模拟地下井壁受力变化时的各种力学性能,借助计算机程序对其进行数据统计。本文通过分析本校实验室原有三轴实验加载装置存在的缺陷——承载力(40MPa)的不足,提出研发承载力为60MPa的新型三轴高强井壁实验加载装置。通过对井壁模型试验加载的原理,结合原有加载装置的构成,设计出了新型三轴高强井壁实验加载装置。该装置能模拟井壁与地下土壤的接触受力情况,因此新型三轴高强井壁实验加载装置的研发为煤矿工程井壁结构力学模型实验的加载方法开拓了一种新的思维。本文研究主要从以下三个方面进行:首先介绍了《材料力学》中厚壁圆筒的弹性理论分析,利用推导出的公式对加载装置的厚壁圆筒壁厚进行了计算;而上下圆端盖厚度是通过《过程设备设计》中周边固支的圆平板理论计算的;螺钉型号数量则是参考《机械设计手册》进行计算验证的。其次就理论计算得出的圆筒尺寸利用ANSYS有限元软件对其选用So1id45单元进行建模分析,在60MPa压力下厚壁圆筒能满足承载力的要求但是圆筒中部出现应力集中现象,为了改善此现象对厚壁圆筒中部进行加肋处理并得出加肋的高度和厚度。最后从加载装置的铸造工艺方面进行了相关阐述。通过本次研究发现壁厚为72mm、上下平端盖85mm的厚度和12.9级M30的加固螺钉能满足预期60MPa的承载能力,另外通过数值模拟发现厚壁圆筒中部增加厚度38mm,高度100mm的肋能有效的改善筒体中部应力集中的现象。
[Abstract]:Drilling technology has been innovated and developed with the continuous progress of coal mining industry, and the stability of shaft lining structure has been a hot topic discussed by researchers. In order to study the mechanical properties of the interaction between wall structure, soil layer and groundwater, it is necessary to carry out simulation experiments by means of triaxial high-strength shaft lining experimental loading device. The experimental loading device of triaxial high strength shaft lining is based on the simulation of various mechanical properties of underground shaft wall with the help of computer program. Based on the analysis of the defects of the original triaxial experimental loading device (40MPa) in our laboratory, a new type of triaxial high-strength shaft lining experimental loading device with 60MPa bearing capacity is proposed in this paper. A new type of triaxial high-strength shaft lining experimental loading device is designed through the principle of shaft wall model test loading and the composition of the original loading device. The device can simulate the contact force between shaft wall and underground soil, so the development of new triaxial high-strength shaft wall experimental loading device has opened up a new thinking for loading method of shaft wall structural mechanical model experiment in coal mine engineering. This paper mainly studies from the following three aspects: firstly, the elastic theory analysis of the medium thick wall cylinder is introduced, and the thickness of the thick wall cylinder is calculated by using the derived formula. The thickness of upper and lower circular end cover is calculated by the theory of circular plate clamped around in process equipment Design, and the number of screw type is verified by reference to the Manual of Mechanical Design. Secondly, the cylinder size calculated by theory is modeled and analyzed by using ANSYS finite element software to select So1id45 element. Under 60MPa pressure, the thick-walled cylinder can meet the requirements of bearing capacity, but the stress concentration phenomenon appears in the middle of the cylinder. In order to improve this phenomenon, the thick-walled cylinder is stiffened and the height and thickness of the rib are obtained. Finally, the foundry process of the loading device is expounded. It is found that the wall thickness is 72 mm, the thickness of the upper and lower end cover 85mm and the 12.9 grade M30 reinforcement screw can meet the expected bearing capacity of 60MPa. In addition, the numerical simulation shows that the thickness of the thick wall cylinder increases by 38 mm in the middle of the cylinder. The high 100mm rib can effectively improve the stress concentration in the middle of the tube.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD26
[Abstract]:Drilling technology has been innovated and developed with the continuous progress of coal mining industry, and the stability of shaft lining structure has been a hot topic discussed by researchers. In order to study the mechanical properties of the interaction between wall structure, soil layer and groundwater, it is necessary to carry out simulation experiments by means of triaxial high-strength shaft lining experimental loading device. The experimental loading device of triaxial high strength shaft lining is based on the simulation of various mechanical properties of underground shaft wall with the help of computer program. Based on the analysis of the defects of the original triaxial experimental loading device (40MPa) in our laboratory, a new type of triaxial high-strength shaft lining experimental loading device with 60MPa bearing capacity is proposed in this paper. A new type of triaxial high-strength shaft lining experimental loading device is designed through the principle of shaft wall model test loading and the composition of the original loading device. The device can simulate the contact force between shaft wall and underground soil, so the development of new triaxial high-strength shaft wall experimental loading device has opened up a new thinking for loading method of shaft wall structural mechanical model experiment in coal mine engineering. This paper mainly studies from the following three aspects: firstly, the elastic theory analysis of the medium thick wall cylinder is introduced, and the thickness of the thick wall cylinder is calculated by using the derived formula. The thickness of upper and lower circular end cover is calculated by the theory of circular plate clamped around in process equipment Design, and the number of screw type is verified by reference to the Manual of Mechanical Design. Secondly, the cylinder size calculated by theory is modeled and analyzed by using ANSYS finite element software to select So1id45 element. Under 60MPa pressure, the thick-walled cylinder can meet the requirements of bearing capacity, but the stress concentration phenomenon appears in the middle of the cylinder. In order to improve this phenomenon, the thick-walled cylinder is stiffened and the height and thickness of the rib are obtained. Finally, the foundry process of the loading device is expounded. It is found that the wall thickness is 72 mm, the thickness of the upper and lower end cover 85mm and the 12.9 grade M30 reinforcement screw can meet the expected bearing capacity of 60MPa. In addition, the numerical simulation shows that the thickness of the thick wall cylinder increases by 38 mm in the middle of the cylinder. The high 100mm rib can effectively improve the stress concentration in the middle of the tube.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD26
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4 O赐蜢，
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