基于周期结构原理的钢轨振动模型能够考虑钢轨截面变形对振动的影响，本文给出了该模型的理论基础，并给出了算例。
In this, a model based on periodic structure theory is presented, it can take the cross-section deformation into consideration.
可采用多种钢轨廓形，使每种廓形与车轮均有一定数量的接触点，可以提高导向性能和总体的车辆运行质量，从而减少噪声和振动。
Use of a variety of rail profiles with a range of contact points improves steering and overall ride quality, and thereby reduces noise and vibration.
证明钢轨在低频段是整体振动。
运用ANSYS对车轮进行了模态分析，求得车轮导纳以及钢轨和车轮振动速度的功率谱。
The modal analysis of the wheel is done using the software ANSYS. Calculate the wheel mobility and the vibration velocity spectrum of the wheel and rail is calculated.
超长无缝钢轨减少了列车行驶过程中的振动。
结果表明：一、轮轨噪声以钢轨辐射的声能为主；二、不能忽略钢轨横向振动对轮轨噪声的影响。
The first conclusion is that the power of wheel/rail noise is radiated by rail primarily.
本文将铁路轨道看作由钢轨和轨枕组成的双层弹性系统，用两个偏微分方程联立描述其振动。
In this paper the railway track is considered as a double elastic system of both rails and sleepers and the vibration is described in detail with two partial differential equations.
为由钢轨表面振动直接求得钢轨辐射噪声提供了理论基础，简化了计算过程。
It provides a theoretical foundation for getting the rail noise power from the rail vibration directly and simplifies the calculating process.
从计算结果可知，轨道结构的横向振动频率较低，且钢轨与轨枕的横向振动主频相接近。
From the calculating results, the main frequency of rail and sleeper lateral vibration is low.
道床刚度时轨道的横向振动影响较大，从理论上分析了钢轨和轨枕的动力响应与轨道横向刚度之间的关系。
The lateral stiffness of ballast affects the lateral vibration greatly. This paper analyses theoretically the dynamic response of rail and sleeper vibration under different stiffness.
针对桥上无缝道岔，运用有限单元法，建立了钢轨-岔枕-桥梁弹簧-阻尼空间振动模型。
Aiming at vibration analysis of seamless turnout on bridge, the rail-turnout-tie-bridge spring-damping vibration model was built by using finite element method.
针对桥上无缝道岔，运用有限单元法，建立了钢轨-岔枕-桥梁弹簧-阻尼空间振动模型。
Aiming at vibration analysis of seamless turnout on bridge, the rail-turnout-tie-bridge spring-damping vibration model was built by using finite element method.
应用推荐