填石压实的一种理想施工方法

介绍了填石压实的施工现状及其特点,并对冲击式压路机与同重量级振动压路机性能进行对比分析,通过填石冲击压实工程实例,得出了使用冲击式压路机是填石的一种理想施工方法.     

冲击压实在路基工程中的应用

结合工程实例,分析冲击压实原理,表明冲击压实同一般三轮压路机和振动压路机相比,压实效果和压实效率高,具有减少工后沉降、提高路基施工质量、加固软弱地基的作用.简单介绍了冲击压实的机械选用、压实深度、适用范围、优缺点,阐述了施工要求.     

振动压路机起步压痕产生原因及消除方法

研究了振动压路机行走系统和振动系统起步速度对单位长度内冲击压实次数的影响,探讨了基于单位长度内冲击压实次数的振动压路机启动控制方法,可以为振动压路机的设计和碾压质量控制提供有益参考.     

振荡压实滑转工况下被碾压材料吸收有效压实能量的研究

为了探讨振荡压路机在压实过程中振荡轮与被压实路面间存在滑转的工况下,被碾压材料所能吸收的有效压实能量,采用能量平衡的理论,通过图解对比方法定性分析了消耗在路面压实和滑转损失过程中的能量分配,建立了被碾压材料吸收有效压实功的计算模型,研究了激振能量、铺层压实程度、有效压实功与滑转率的关系,提出了最佳滑转率的概念。研究和试验结果表明：当振荡压路机在最佳滑转率状态下工作时,被碾压材料能够吸收最大的有效压实功;随着碾压遍数的增加,应逐步减少输给振荡轮的激振能量;被碾压材料吸收有效压实功的计算模型与实际的压实效果试验相吻合。     

冲击式压路机在路基施工中的使用

冲击式压路机是一种新型拖式压实机械，它与传统的拖式压路机的最大不同点是利用多边形凸状碾轮进行冲击压实，来提高土基的压实度和承载力。该文简要介绍了影响公路路基压实度的主要因素，冲击压路机的工作原理和性能指标，以及在工程中的使用情况。     

振荡压路机智能化压实的评价标准及优化目标

首先从能量转换方面分析了振荡压路机的压实过程,结合实例分析了过度压实与振松的不良压实效果。通过对实例的分析提出了比压实功的概念,并在此基础上建立了能量评价标准。随后建立了基于能量平衡的振荡压实过程优化控制的目标函数,为今后压实过程中的智能化控制提供了理论依据。     

低液限土的冲击压实特性分析

针对高速公路低液限土的特点,采用不同冲击振动压路机组合工况进行试验,碾压后测量压实度评价低液限土的压实效果.研究表明:采用冲击压实技术能够达到低液限土的压实需求,比普通压路机的组合压实效果提高了5％左右,为工程应用提供了可靠依据.     

冲击压路机在高速公路填方路基中的应用

利用冲击压路机的冲击碾压技术对高速公路路基进行施工,通过大量的试验研究,确定了碾压的方法、遍数、速度等数据,并考察了冲击压路机的压实机理和影响冲击压实的因素。试验表明：利用冲击压路机的冲击碾压技术可提高路基的压实度、整体强度和承载力,加速了路基的下沉,减少了路基的工后沉降。     

冲击式压路机在路基压实中的应用

通过对湿陷性黄土的压实试验，测定冲击式压路机压实性能，规范其施工工艺，为以后广泛应用奠定了基础。     

智能型双钢轮振动压路机在路面施工中的使用优势

通过对振动压实系统的结构及性能进行对比,结合实际路面施工中的使用效果,分析了智能压实系统相对于普通振动压路机不同的工作原理,论证了智能型振动压路机具有集自动调整振动能量与自动检测路面压实效果于一身的显著优势,结果表明智能型压路机符合现代化施工中高效、节能以及适应性强的要求,有较好的使用前景。     

振动压路机橡胶减振器的隔振性能分析

分析了振动压路机减振器的材料丁腈橡胶的动态性能和振动压路机的减振系统模型,研究表明:在常温下,橡胶减振器动态性能很差,他是导致压路机减振性能不理想的主要原因之一。在动态分析基础上设计减振器,同时改善减振器的动态性能是提高压路机的隔振性能的必要条件。     

轮胎压路机压实沥青混合料原理分析

沥青混合料的压实是影响沥青路面性能的重要因素之一。根据轮胎压路机的压实过程,结合有效应力和固结原理并结合力学原理,分析轮胎压路机的压实机理及揉搓作用,提出轮胎压路机在对沥青混合料压实中的使用注意事项。     

轿车在转鼓台的性能测试工艺

转鼓试验台是一种普遍用于轿车整车装配检测线的测试设备,它具有多功能和高效率的测试特点,它可以测试ABS性能、传统制动力性能、动力传动性能、速度表校对、空调制冷性能及自动巡航性能等。文章介绍了转鼓试验台的结构和测试原理,并对测试的项目进行详细地测试特点分析,从而制定了转鼓测试工艺流程,该流程应用于东风某轿车厂生产后,表明制定的流程合理且高效,充分发挥了转鼓测试的优点。     

轮胎压路机驱动方式的对比分析

通过对现有市场上的轮胎压路机机械传动、液力传动、液压传动3种传动方式的对比分析，归纳出其优缺点，综合分析得出液压传动的轮胎压路机在性能、工作效率、维护保养、驾驶的舒适性方面有着较为明显的优势。     

A numerical model of a HIL scaled roller rig for simulation of wheel–rail degraded adhesion condition

Scaled roller rigs used for railway applications play a fundamental role in the development of new technologies and new devices, combining the hardware in the loop (HIL) benefits with the reduction of the economic investments. The main problem of the scaled roller rig with respect to the full scale ones is the improved complexity due to the scaling factors. For this reason, before building the test rig, the development of a software model of the HIL system can be useful to analyse the system behaviour in different operative conditions. One has to consider the multi-body behaviour of the scaled roller rig, the controller and the model of the virtual vehicle, whose dynamics has to be reproduced on the rig. The main purpose of this work is the development of a complete model that satisfies the previous requirements and in particular the performance analysis of the controller and of the dynamical behaviour of the scaled roller rig when some disturbances are simulated with low adhesion conditions. Since the scaled roller rig will be used to simulate degraded adhesion conditions, accurate and realistic wheel–roller contact model also has to be included in the model. The contact model consists of two parts: the contact point detection and the adhesion model. The first part is based on a numerical method described in some previous studies for the wheel–rail case and modified to simulate the three-dimensional contact between revolute surfaces (wheel–roller). The second part consists in the evaluation of the contact forces by means of the Hertz theory for the normal problem and the Kalker theory for the tangential problem. Some numerical tests were performed, in particular low adhesion conditions were simulated, and bogie hunting and dynamical imbalance of the wheelsets were introduced. The tests were devoted to verify the robustness of control system with respect to some of the more frequent disturbances that may influence the roller rig dynamics. In particular we verified that the wheelset imbalance could significantly influence system performance, and to reduce the effect of this disturbance a multistate filter was designed.     

液压全驱单钢轮压路机沙土作业的打滑分析

针对液压全驱单钢轮振动压路机沙土作业时后轮打滑的现象,对整机作业时的受力进行分析,指出主要原因是整机牵引力与地面附着性能不匹配。从合理分配驱动力及提高驱动轮附着性能两方面,提出了新的防滑转液压系统,为解决压路机打滑现象提供了新的思路。     

The Application of Roller Rigs to Railway Vehicle Dynamics

Roller rigs have been built world-wide to research into the dynamics of railway vehicles and they have particularly been applied to the development of high-speed trains. This survey takes into consideration both full scale as well as small scale model roller rigs. Besides performance, most important experimental work and the emphasis of application, the scaling strategies of model test rigs and the differences involved in roller rig experiments are treated. Suggestions for potential future uses and developments are also given for this tool which is useful for demonstration and analysis of railway vehicle dynamic behaviour.     

The Application of Roller Rigs to Railway Vehicle Dynamics

Roller rigs have been built world-wide to research into the dynamics of railway vehicles and they have particularly been applied to the development of high-speed trains. This survey takes into consideration both full scale as well as small scale model roller rigs. Besides performance, most important experimental work and the emphasis of application, the scaling strategies of model test rigs and the differences involved in roller rig experiments are treated. Suggestions for potential future uses and developments are also given for this tool which is useful for demonstration and analysis of railway vehicle dynamic behaviour.     

新型两轮压路机设计方案

介绍了一种新型双钢轮压路机的设计思想、传动方案及主参数设计，并认为这是一个性能较好，使用可靠，成本较低，用户易接受的经济机型。