为了克服剪钉式和反扣式两种安全接头的不足，研制出一种滑套式井下安全接头。
To overcome the shortcomings of the shear pin type joint and left-hand thread type joint, a sliding sleeve subsurface safety joint is developed.
针对倒扣式常规安全接头在井下退开难度较大，剪钉式安全接头完井作业易中途断脱的问题，研制了一种液压控制型安全接头。
To solve problems of difficultly releasing and easily breaking off of the conventional safety joint while operating in downhole, a new hydraulic controlling joint is developed.
对埋入式柱脚中抗剪栓钉的受力性能进行了分析和研究；根据试验结果，提出较为合理的计算方法。
This paper analyses and studies the function of shear bolt nails in imbedded heels under pressure. According to the experimental result, a more reasonable calculating method is raised.
混凝土受压状态下栓钉抗剪承载力约为现行钢结构设计规范规定值的1.5 ~ 2.2倍。
The push-out test results of shear bearing capacity is about 1.5-2.2 times of the value of current design specifications.
通过建立一个三维有限元模型，研究土钉在不同上覆压力和剪胀作用下的土钉抗拔行为。
In this paper, a three-dimensional (3d) finite element (fe) model is developed to simulate the behavior of soil nail considering the effects of overburden pressure and dilation.
钢结构系列：钢结构用高强度大六角头螺栓，扭剪型螺栓连接副，钢网架球节点用高强度螺栓，焊钉，钻尾丝等。
Steel Series: steel with high strength large hexagon head bolts, torsion shear bolt connections made, the steel truss joints of high strength bolts, studs, drill the end of wire.
通过试验和有限元分析研究被连接元件的相对刚度对多钉双剪连接钉载分配的影响。
In the present paper, an experimental and analytical study of effects of jointed member stiffness on the fastener load distribution is performed for double-shear, multiple-bolted joints of composite.
针对T300/KH304复合材料层合板的单排多钉双剪联接接头，考虑到孔间距离对接头强度的影响，用三维有限元模型对接头的静强度进行数值分析。
The effect of the distance between holes is taken into consideration, strength of multiple double lapped joints of T300/KH304 CFRP is analyzed by three dimensional finite element model.
针对T300/KH304复合材料层合板的单排多钉双剪联接接头，考虑到孔间距离对接头强度的影响，用三维有限元模型对接头的静强度进行数值分析。
The effect of the distance between holes is taken into consideration, strength of multiple double lapped joints of T300/KH304 CFRP is analyzed by three dimensional finite element model.
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