查询词典 contact rail

The complete model of locomotive and vehicle and the exact motion equations of wheel-set are established, in which, three-dimension wheel/rail contact geometry is taken into account and the Kalker's creep theory is employed to analyze the effects of the contact region of wheel/rail. An iterative procedure of solving wheel/rail creep force is proposed to improve the existed calculating method. Finally, the motion equations of vehicle with 23 DOFs are derived using the D'Alembert principle.

建立了较完善的机车车辆分析模型和较精确的轮对运动方程：考虑三维非线性轮轨接触几何关系，用Kalker蠕滑理论研究了轮轨接触区的蠕滑效应，建立了较为详细的轮对运动方程，提出用迭代法来求解轮轨蠕滑力从而对现有蠕滑力求解方法进行了改进，并采用D′Alembert原理推导了23个自由度车辆的运动方程。

In addition, total wheel/rail contact calculation with divided rail outline method are raised. Under the condition of considering the displacement, bouncing, yaw, roll of wheelsets and displacement, bouncing, roll of rails, minimum gap between rail and wheel were calculated by the trochoid method and divided rail outline method, we can easily judge totally real contact states of the wheel/rail such as normal one-point contact, nonnormal one-point contact, two-point contact and wheel complete lift. Wheel/rail normal forces in the two contact point are respectively calculated by nonlinear Hertz contact theory, and then, result of simulation more close to reality on actual track.

另外，提出了轨廓分区法全面计算轮轨接触状态法，在考虑轮对的横移、浮沉、摇头、侧滚和左右钢轨的横移、浮沉、侧滚的条件下，可全面地分别计算左右侧轨顶和轨侧区域与车轮的最小轮轨间隙量，以此来判断轮轨的真实接触状态：正常的一点接触、非正常的一点接触、两点接触和车轮完全悬浮，并根据非线性赫兹接触理论分别求得两接触点处的轮轨法向力，从而使仿真结果更接近于车辆在实际线路上的运行状态。

The computation model of two-point contact (for cone-tread) and conformal contact (for worn-tread) resulting from wheel flange close to rail is firstly established in this paper. A detailed analysis is made of the wheel/rail contact force, contact status and wheel/rail stress distribution on the different action of tractive forces and transverse forces. We draw some important conclusions, one of which is that the locomotive adhesion performance will decrease with the increase of transverse forces between wheel and rail.

本文建立了车轮轮缘贴靠钢轨形成的轮轨两点接触和共形接触的计算模型，对不同的牵引力矩、不同的横向力作用下的轮轨接触力、接触状态和轮轨应力分布进行了详细的分析，得出了轮轨间横向力增大会降低机车粘着性能等一系列重要结论。

Thus,locks through the rail switch electricity the contact locks for the signal electricity the magnet coil delivers the electric current,only then the switch location correct only then causes the closed circuit,the signal electricity to lock has the enough electric current,after namely the approval moves the signal handle to cause the semaphore opens,by the signal electricity locks the contact for the rail switch electricity to lock the magnet coil power transmission electric circuit to separate,therefore cannot move the rail switch handle again,soon the rail switch locks in the position.

这样，通过道岔电锁器的接点给信号电锁器的电磁线圈送电流，只有道岔位置正确才使电路接通，信号电锁器有足够电流，即准许扳动信号握柄使信号机开放后，由信号电锁器的接点给道岔电锁器电磁线圈送电的电路被断开，于是再不能扳动道岔握柄，即将道岔锁在规定位置上。

Some experts and scholars with Kalker as a representative have contributed a lot to the development of wheel/rail rolling contact theory. But their theory hasn't broken the limit of Hertz contact conditions and elastic-half-space assumption, which cannot be used to make further investigation in the problem of, complicated wheel/rail reaction.

以Kalker为代表的国内外专家学者为轮轨滚动接触理论的发展做出了巨大的贡献，但他们的理论至今未突破Hertz接触条件和弹性半空间假设，无法对复杂的轮轨作用问题作进一步的研究。

Some experts and scholars with Kalker as a representative have contributed a lot to the development of wheel/rail rolling contact theory. But their theory hasnt broken the limit of Hertz contact conditions and elastic-half-space assumption, which cannot be used to make further investigation in the problem of, complicated wheel/rail reaction.

以Kalker为代表的国内外专家学者为轮轨滚动接触理论的发展做出了巨大的贡献，但他们的理论至今未突破Hertz接触条件和弹性半空间假设，无法对复杂的轮轨作用问题作进一步的研究。

With the development arise some problems of the wheel/rail performance, the requirement of the train traction for the adhesion of wheel/rail will become more and more strict, and rail corrugation of wheel/rail, rolling contact fatigue and derailment will become more and more serious. The solution to the problems will have direct effects on the railway development.

当前世界铁路正朝着高速和重载的方向发展，随之而来的是列车牵引对轮轨粘着的要求越来越高，而轮轨的波浪形磨耗、滚动接触疲劳、脱轨等轮轨关系问题越来越严重，其解决与否直接影响到铁路的快速发展。

The development tendency of the railway construction in the world today is serving high speed trains and csirrying heavy load. With the development arise some problems of the wheel/rail performance, the requirement of the train traction for the adhesion of wheel/rail will become more and more strict, and rail corrugation of wheel/rail, rolling contact fatigue and derailment will become more and more serious. The solution to the problems will have direct effects on the railway development.

当前世界铁路正朝着高速和重载的方向发展，随之而来的是列车牵引对轮轨粘着的要求越来越高，而轮轨的波浪形磨耗、滚动接触疲劳、脱轨等轮轨关系问题越来越严重，其解决与否直接影响到铁路的快速发展。

In history of metro development about 40 years in China, the technology of contact rail updated step by step, and takes aim at international advanced level at present.

在我国近40年的地铁发展史上，其接触轨技术从零开始一步步向前发展，现在已经瞄准了接触轨技术的国际前沿。

Among the four relations of study for system design standard, it is suggested the focus is the relations between 1500V DC contact rail and human safety.

在直流1500V接触轨系统的&四大环节&研究中，建议重点对系统设计标准及产品制造标准进行研究；在系统设计标准的&四大关系&研究中，建议重点对1500V接触轨与人身安全防护关系进行研究。

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