查询词典 cart track

According to structural characteristics of floating slab tracks, a track segment element was taken between two adjacent fasteners. For each element, rails were regarded as Euler beams supported by discrete viscoelastic supports. The fasteners and rubber supports were replaced by a linear spring and damp. So the vibration model of the floating slab track was established. In constructing vibration model of a metro train, each car of the metro train with two suspensions was modeled as a multi-rigid body system, in which rigid bodies were connected with each other by a linear spring and damp. Combining the potential energy of vertical vibration of the track with that of the metro train, the total potential energy of vertical vibration of the train and track was obtained. And then, the matrix equation of vertical vibration of the system was established using the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating system matrices. The vibration responses of the system can be obtained by solving the matrix equation with the direct time integration such as Wilson-θ method.

摘 要：针对浮置板式轨道结构特点，取相邻2个扣件之间的轨道为1个轨段单元，钢轨视为连续弹性点支承Euler梁，浮置板视为弹性薄板，扣件系统及橡胶支座均模拟为线性弹簧及粘滞阻尼器，建立浮置板式轨道振动模型；将城轨列车中的车辆均离散为多刚体系统，各刚体之间通过线性弹簧及粘滞阻尼器相连，建立列车振动模型；将浮置板式轨道及列车振动势能叠加，得到系统竖向振动总势能；基于弹性系统动力学总势能不变值原理及形成系统矩阵的"对号入座"法则，建立此系统竖向振动矩阵方程；采用Wilson-θ逐步积分法求解此矩阵方程，得出此系统竖向振动响应。

This paper analyses the sustainable development of track and field sports from the macroscopical and microcosmical angles of view,discusses the sustainable development of track and field sports from the angle of the market and factors influencing the development of track and field sports, in order to provide reference s for the future developing direction and relevant decision-making of track and fields sports.

从宏观和微观的角度分析田径运动的可持续发展，并从市场的角度和影响田径运动发展的诸因素来探讨田径运动的可持续发展，旨在对田径运动今后的发展方向及相关决策提供参考。

The rule of the circuit of track of our country is mainly to move the circuit of track frequently, including domestic 18 information move frequently track circuit and introduce France UM71 type and ZPW-2000 type that domesticize move circuit of track frequently.

我国轨道电路的制式主要是移频轨道电路，包括国产18信息移频轨道电路和引进法国UM71型并加以国产化的ZPW—2000型移频轨道电路。

Line and arrival-depart track impropriate table model on single-track, double-track or multi-track is set up.

提出了区间线路和到发线占用表模型，该模型不仅对单双线适用，同时适用于三线及多线铁路。

In order to investigate the dynamic performances of the curved track structure,the dynamic properties of the strengthened track and the unstrengthened track were compared based on system engineering theory and vehicle-track coupling dynamics.

基于系统工程思想，运用机车车辆-轨道耦合动力学理论，对采取了强化技术对策后的山区铁路小半径曲线轨道的动力性能进行仿真计算，并与强化前轨道结构动力学性能进行了对比分析。

In this thesis, a detailed dynamics model of various kinds of tracks laid on the bridge such as ballast track, REHDA track, slab track, elasticity supported block track and all kinds of roadbed-bridge transition structure of the high-speed railway is established for the

本文在国内首次针对高速铁路桥上有碴轨道、长枕埋入式无碴轨道、板式轨道、弹性支承块式轨道结构以及各种轨道的路桥过渡段建立了系统全面的动力学模型。

Research purposes:The paper gives an introduction to the additional force transfer mechanism of welded turnout on ballastless track,presents the calculation model for welded turnout on ballastless track, calculates additional force and deformation of welded turnout on ballastless track by FEM,the result is compared with ballast track.

研究目的：分析无砟轨道基础上无缝道岔的纵向力传递机理，建立无砟无缝道岔计算模型，采用有限单元法计算了无砟无缝道岔受力及变形，并与有砟轨道无缝道岔进行了对比分析，为无砟无缝道岔设计提供参考依据。

The bridge type derrick big car will appear to chew track phenomenon in the movement, slight of chew a track will result in a good luck and orbit of the on the side have obvious of wear away trace, severity chew a track will result in a good luck and orbit of the on the side metals be peeling off or the round's good luck outwardly transform and even jump the track to result in graveness Human body dead and injured and equipments trouble.

桥式起重机大车在运行中会出现啃轨现象，轻微的啃轨会造成轮缘及轨道的侧面有明显的磨损痕迹，严重啃轨会造成轮缘和轨道的侧面金属剥落或轮缘向外变形，甚至脱轨造成重大人身伤亡和设备事故。

Based on the theory study, a directional drilling guidance system is developed for practical require, its working flow as follows: before construction, design the best track practically, and save in the system. During drilling, the system measures well oblique angle and azimuth to watch well track. Drill driver compares designing well track with measuring track showing on display unit, controls joy stick experientially, adjusts drill direction, finally realizes directional drill.

在理论研究的基础上，结合实际需要，研究设计了一种定向钻井导航系统，使用该系统进行定向穿越施工的工作过程如下：在施工前，根据实际情况，先设计一条最佳穿越路线，存入系统；在钻进中，系统通过对井轨的井斜、方位等参数的测量，对其进行实时监测；地面的司钻手通过对显示仪所显示的实际井轨参数及设计井轨参数进行比较，根据经验操纵操作杆，调整钻机前进方向，以达到对钻进过程的控制，最终实现定向钻井。

This time you're not the driver of the trolley car,you are an onlooker.you are standing on a bridge,overlooking a trolley car track,and down the track come the trolley car, at the end of the track are five wokers.the brakes don't work.the trolley car is about to crash into the five and kill them.and now you are not the driver,you really fell helpless.until you notice standing next to you,leaning over the bridge is a very fat man.and you could give him a sholve,he will fall over the bridge onto the track.right in the way of the trolley car.he would die but he would spare the five.now how many would push the fat man over the bridge .raise your hands.

现在，你不是电车司机，你是个旁观者，你站在桥上，俯瞰电车的电轨，沿着轨道尽头有5个工人。电车手刹照样不灵了。电车快要撞向这5人。你不是司机，你真的感觉很无助。突然，你看见站在你旁边，桥边还有一个非常胖的人，你可以推他一把，他会掉到轨道上，刚好能停住车。他会死去，但能救活其他5个人。有多少人会推那个胖子？

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。