列车

Based on the analysis of the lateral dynamics of tractor-trailer combination , tests on snaking characteristic of the scale model of tractor-trailer are carried out at different velocities and parameters.

在建立汽车列车横向动力学模型的基础上，在汽车列车横摆模拟实验台上，对在不同车速、不同结构参数条件下的汽车列车横向摆振特性进行试验，并对试验结果和数字仿真结果进行对比分析。

Test results are as follows: Ballastless track structures can effectively improve the dynamic action of train loads on subgrade beds, the measured stresses and acceleration rates are far smaller than those measured with ballasted track structures; axle loads have remarkable influence on dynamic stresses of ballastless track subgrades and have some influence on acceleration responses; speeds of either motor car units or freight trains all have limited effect on dynamic embankment responses; after attenuating over 3 meters high embankment, neither dynamic stresses nor acceleration rates are influential to net cushions at the bottom of column-net structure subgrades

结果表明：采用无砟轨道结构可以有效改善列车荷载对路基基床的动力作用，测得的动应力与加速度值均远小于有砟轨道结构测得的值；列车轴重对无砟轨道路基的动应力影响明显，对加速度响应也有一定影响；无论是动车组还是货物列车，其运行速度对路堤部分的动响应影响均有限；动应力与加速度经3 m 高的路堤后衰减，对桩网结构路基下部的网垫层已基本无影响。

The calculated results are corresponded to the real results, and the time history curves of vibration response of the system were obtained when the train derails.

摘 要：结合自动控制理论，研究了桥上列车脱轨的力学机理，发现桥上列车脱轨是列车-桥梁时变系统横向振动丧失稳定的结果。

When the train running continuously, the temperature of axles and the axle's bearing will rise. This will induce some accidents about the train. It is a great hidden trouble when the train running.

列车长时间的运行会使列车轴承和车轴温度升高，有可能导致切轴甚至列车颠覆，是列车运行中的重大隐患。

The 3D free vibration properties of the cable-stayed bridge with three towers of the schemed Beijing-Shanghai high-speed railway NanjingYangtze-River bridge are analyzed by space bar FEM model. The coupling vibration responses of vehicle-bridge system under moving ICE high-speed trains a...

以京沪高速铁路南京长江大桥3塔斜拉桥方案为例，分析了大跨度斜拉桥在ICE高速列车作用下的车桥动力响应特点；同时，基于合理的列车走行性评价指标，对高速列车通过大跨度斜拉桥时的走行安全性与舒适性进行了详细分析，初步探讨了大跨度斜拉桥用于高速铁路的可行性。

The difference between the national "Code for design of metro"(GB50157-2003) and the NFPA130 "Standard for Fixed Guide-way Transit and Passenger Rail Systems" on calculation method for person evacuation time in the metro station fire is compared.

针对地铁车站火灾人员疏散时间计算方法的问题，比较研究国内现行《地铁设计规范》(GB50157-2003)和美国专门针对有轨交通系统的NFPA130标准的异同，其结果说明：国内设计规范关于人员疏散时间的计算方法存在不足；对区间隧道内列车着火的情况进行分析讨论，指出对列车在区间隧道内着火，且还能继续运行的情况，着火列车的运行速度对火势的发展以及人员疏散时间的影响是不可忽视的。

The influences of natural wind speed distribution and train running speed on the aerodynamic characteristics of the maglev train under crosswinds are probed in details.

文献[1]的计算只考了静止列车在均匀自然风作用下的稳定性问题，并没考虑自然风速的分布和列车速度对列车气动力特性的响。

Accordingly the whole understanding to the pressure and velocity state of flow field around high-speed train is comprehended.

从而得第 11页西南交通大学搏士研究生学位论文到列车外部流场中压力和速度分布状况的较为完整的认识，为列车的强度设计，列车周围设施的抗风设计以及路边作业人员的安全和行为规范的制定提供了一个可资参照的依据。

This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.

这种极性的变化导致列车前方牵引列车前进的电磁场，同时列车后面的电磁场加上了更多的向前推力。

The train is then stopped and the overhead leads removed. The leading car is then used to drag the rest of the train out of the shed. Care has to be taken to ensure all leads are removed before allowing a train to leave the shed and enter service.

然后列车要停下来，将悬吊线解下，由第一节车牵引列车出库，在列车离库进入运用前，必须确认所有的悬吊线都从车上解下。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。