接头作用

In the end, stress distribution at the connection position and distribution of contact pressure on the thread teeth are deduced by applying equivalent contact pressure.

通过变形协调原理，求出了轴向力沿接头螺纹牙的大小分布，进而求出了上扣、内压和拉伸工况综合作用下的等效接触压力。

Now, the technology of flash welding has been applying in the engineering of rail welding progressively. The temperature field of flash welding plays a crucial role in the quality of welding joint, so the study of welding temperature field is significant to ensure the traffic safety and quality of welding and reduce the cost of welding.

目前，闪光焊技术在我国钢轨现场焊接工程中的应用正日益增多，由于钢轨闪光焊的焊接温度场对接头质量起着决定性的作用，因而开展钢轨闪光焊温度场的研究，对于控制焊接质量，降低焊接成本，提高列车运行安全具有十分重要的意义。

The seismic disasters features and behavior mechanisms of the buriedwater supply pipeline are analyzed by synthesis and the breakage of thepipe joints caused by seismic wave propagation as main disasters mode isled into. The soil-pipe interaction, and the soil-pipe slippage arediscussed. Statistical experience method resulted from earthquakeinvestigations and theoretical methods based on reliability theory areintroduced. The reliability of buried pipeline is researched. The methodfor estimate connective reliability of network by means of Monte Carlesimulation technique and Breadth First Search method is introduced. Theconnective reliability of water supply pipe network is researched.

本文综合分析了地下供水管道的地震破坏特征和反应机理，引入了以接头破坏作为主要的破坏模式，并探讨了管土间的相互作用和滑移作用等问题；介绍了根据震害调查数据回归的统计经验法和基于可靠性理论的理论分析法，对地下管道的可靠性进行了研究；介绍了利用蒙特卡罗法和网络图论中的广度优先搜索法判定网络连通可靠度的方法，对供水管网的连通可靠性进行了研究；考虑到震害预测方法中的许多参数是随时间变化的，应用灰色理论和概率论，建立了基于GIS 的供水管网动态震害预测模型。

The research indicate that the performance of brazing joint using Al-Ge-Si brazing filler metal precedes to the one using HL401 brazing filler metal. And the main reason is that brittle compound such as Cu2Al is not appeared in brazing joint.

本研究建立的2090Ce铝锂合金钎缝组织形态成长模型以及母材溶解厚度控制模型对钎料的选择、钎焊工艺参数的选择及接头钎焊间隙的确定等具有重要的参考和指导作用。

Friction stir welding is a new solid state welding technique under the actions of mechanical forces and frictional heat. FSW has many advantages on the aspects of mechanical properties and producing efficiency, such as high strength, low defect, no pollution, etc. FSW can be used to join the buttcover plate and lap jointed sheeting of many materials, such as aluminium alloy, magnesium alloy, copper alloy, etc.

搅拌摩擦焊接是一种在机械力和摩擦热作用下的新型固态焊接技术，在接头力学性能和生产效率上具有较高的优越性，具有低缺陷、高强度以及环保等特点，同时，搅拌摩擦焊接技术可以对包括铝合金、镁合金、铜合金等多种材料的板状构件实现对接或搭接，另外，搅拌摩擦焊接可以较容易实现异种材料的连接。

By using local intoxication of soman (pinacolyl methylphospho-nofluoridate) the processes of regeneration of AChE activity at motor end-plates and of recovery of neuro-muscular transmission of rat diaphragm were observed. An ameliorative effect of HI-6 on these processes was also observed.

用大鼠的在体膈肌局部索曼中毒法，观察了乙酞胆碱酯酶在运动终板的再生和肌接头传递功能的恢复过程，以及肪类药物(HI-6)对两过程的促进作用。

The AChE activity inhibited by early intoxication of soman at the motor end-plates could be reactivated by HI-6 (within 30 min), together with a recovery of neuro-muscular transmission.

中毒早期(30分钟以内)HI-6对索曼抑制的肠肌终板AChE有一定的重活化作用，并能相应地恢复肌接头的传递功能。

Be living in the deep well ultradeep well prospecting process ,Since radial direction force 、Eddy is stird 、Elements such as horizontal vibration and so on being ,In the wake of well drilling time the increase ,The auger post writings is used the casing inside wall crossrange strenuously to broaden ,It is more and more grave to cause casing and drilling rig to join the wornout problem .

论文摘要：在深井超深井勘探过程中，由于径向力、涡动、横向振动等因素的存在，随着钻井时间的增长，钻柱作用于套管内壁的侧向力增大，导致套管和钻具接头磨损的问题越来越严重。造成钻具耐磨带失效的主要原因有地层研磨性、钻杆的井下工况、耐磨材料选择与

After they are disconnect ed, the joint with the self-closed function can prevent the outward seawater ent ering, and prevent the inner hydraulic oil drainning. After they are connected, the fluid circuit is opened by the pressure of the fluid.

这种接头具有自封闭功能，在两油路分离后可以防止外部的海水进入管路，也可以防止管路内的液体流出，连接后，在流体压差的作用下，两液路接通。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了