railway ballast

Theoretical Simulation and Field Experiment on Vibration of Railway Ballast

铁路道床振动的理论模拟与试验研究

Analysis for Structure of Small-sized Hydraulic Transmission Railway Ballast Cleaning Machine

小型液压清筛机的结构分析

Test Analysis on the Quality State Parameter of Newly-Built Railway Ballast Bed

新建铁路道床质量状态参数试验分析

Experimental Study of the Ventilation Drag Parameters in a Railway Ballast Layer

铁路碎石道碴层通风阻力参数试验研究

The Experiment and Research of Main Parameters on Centrifugal Railway Ballast Cleaning Machine

离心筛式清筛机主要技术参数的试验研究

Experimental Study on Thermal Conductivity of Railway Ballast

铁路碎石道碴层导热系数测试研究

An analysis of Excavating Resistance of Railway Ballast Cleaning Machine

清筛机挖掘阻力分析

Analyses of Section Configuration Optimization for the Railway Ballast

铁路道床截面形状优化分析

The Calculation and Test of Railway Ballast Vibration

铁路道床振动计算和试验

Discussion about the Sound Absorption Characteristic of Railway Ballast

铁路道碴地声吸收特性初探

Analysis of Transient Electromagnetic Scattering for Railway Ballast

铁路道碴瞬态电磁散射特性分析

Brief Introduction of Operation Principle for Hydraulic and Pneumatic Systems of Railway Ballast Wagon

石渣铁路运输车液压与气动系统原理简介

In this paper , the thermal conductivity of railway ballast is measured by steady comparison method .

采用稳态比较法，对铁路碎石道碴层的导热系数进行了测试。

Construction Technique of Footing Beam Which Crosses Railway Ballast

横穿铁路道床基础梁施工技术

Then the incoherent scattering field is calculated and analyzed to obtain the electromagnetic parameters for the distribution of the railway ballast .

通过对该散射场的处理，提取出道碴的非相关散射场，然后再对该非相关场进行分析，得出了可描述道碴分布状况的电磁参量。

A Study for the Operation Principle of Harrowing Ballast by Railway Ballast Clearing Machine and the Determination of the Power of Harrowing Ballast

清筛机扒碴工作原理的探讨和扒碴功率的确定

It has been believed for a long time that the cutting resistance and no load resistance of railway ballast cleaning machine is big but resistance of transport ballast is small .

小型清筛机挖掘机构所受阻力的分析，多年来都认为其切削阻力和空载阻力很大，而运碴阻力很小。

The test results show that the thermal conductivity of the railway ballast is almost the same for the two thermal conditions when the temperature difference between the top and bottom of the ballast is smaller .

结果表明：当碎石道碴层顶、底面之间的温差较小时，顶部加热及底部加热两种试验条件下测得的导热系数基本相同；

GPR is a rapid detection of the railway ballast at home and abroad disease is one important way , roadbed for car radar detection data collected , layer multiple and sleeper interference is inevitable .

地质雷达是目前国内外快速检测铁路路基病害的重要方法之一，对于车载铁路路基检测雷达采集的数据，层间多次波和轨枕干扰是不可避免的。

In this paper , we present a method of computing the plastic ultimate load of a structure with the elastoplastic finite element method and carry out a finite element analysis on the plastic ultimate load of railway ballast .

本文详细论述了用弹塑性有限元计算结构塑性极限荷载的方法，并对铁路道床的塑性极根承载力进行了有根元分析。

A discrete model for random media is employed to simulate the distribution of railway ballast . The calculation simulation model for railway ballast is built by random filling in the meshes of FDTD method , and the intensities of the transient electromagnetic scattering field are calculated .

引用离散随机媒质结构来模拟铁路道碴的分布情况，采用在FDTD法的差分网格中进行随机填充来实现铁路道碴的计算模拟模型，并求解其瞬态电磁散射场。

Against to high-speed railway , ballast track and ballastless track have their own merits and drawbacks .

针对高速铁路，有砟轨道和无砟轨道各有优缺点。

Compared with common railway of ballast track , it is required to paved by ballastless track on the whole line and has stricter control of roadbed deformation .

它与普通线路的有碴轨道相比，对路基沉降的变形要求更高、更严。

Study on dynamic stiffness and damp measurement of railway crushed stone ballast

铁路碎石道床动刚度与阻尼的试验研究

Railway crushed stone ballast dynamic stiffness and damp are important parameters of dynamic simulation of track structure .

道床动刚度和阻尼是轨道结构动力仿真计算的重要参数。

Exploration on the Construction Plan of Railway Overhaul and Ballast Screening Across More Than One Railway Administration and the Implementation

跨局进行线路大修清筛施工方案的探讨与实施

The basical features of sand hazard along the railway are eroding ballast , covering track and wearing equipments in desert and semidesert areas .

荒漠、半荒漠地带铁路沙害的基本特征是沙侵道床、埋没轨道、磨蚀设备。