HXD2B型机车的通风系统

介绍了HXD2B型大功率交流传动电力机车的通风系统,并结合HXD2B型电力机车通风系统的独特性,分别从机车通风系统的过滤装置、通风结构、通风设施等几个方面进行了论述.其通风方式符合大功率交流传动电力机车结构及控制部件的特殊性,满足了机车正常的通风冷却要求.     

Research on the H∞ Controller Synthesis for Maglev Suspension System

The performances of a single-magnet model, which is the simplified model of Maglev suspension, are analyzed. The H∞ controller synthesized for the single-magnet model is presented. The synthesis results show that the control performance and robustness performance are satisfactory and the application of the H∞ controller to Maglev suspension is feasible and effective.     

Ride quality evaluation of a vehicle with a planar suspension system

The longitudinal connection between a chassis and a wheel in a conventional vehicle suspension system is commonly very stiff than the vertical connection. Such a mechanism can efficiently isolate vibrations and absorb shocks in the vertical direction but cannot sufficiently attenuate the impact in the longitudinal direction. In order to overcome such a limitation, a planar suspension system (PSS) with spring–damper struts in both the longitudinal and vertical directions is proposed so that the vibration along any direction in the wheel rotation plane can be isolated. In this paper, the dynamic responses of a vehicle with PSS due to a single bump and random road unevenness are investigated. The ride quality of the vehicle with PSS is evaluated in accordance with ISO 2631. A comparison with that of a similar conventional vehicle is conducted to demonstrate the promising potentials of the PSS in improving the vehicle ride quality.     

菜园坝长江大桥上部结构施工监控

介绍菜园坝长江大桥上部结构施工监控，阐述斜拉扣挂法单榀拼装桥梁拱肋的施工特点、监控方法，并总结预制悬拼钢桁梁的施工控制经验。     

船维修器材收发管理系统集成化研究

数据安全保密、系统简便可靠、调度快速反应3个问题是器材保障信息化的关键。文章利用多媒体技术、移动通讯技术、嵌入式数据库技术，实现器材收发管理系统的软硬件集成来解决这3个问题。对提高船维修器材机动保障工作的效率和质量，以及船维修器材机动保障的信息化水平具有重要意义。     

15号车钩防跳装置的结构改进

分析了15号车钩在运用中出现车钩分离故障的原因,在不改变15号车钩原有结构设计和外形尺寸的前提下,提出了对车钩附加防跳装置的改进方案.     

转向架钢制螺旋弹簧疲劳寿命影响因素分析

从原材料纯度、表面质量、弹簧腐蚀及端圈结构等几个方面阐述了影响转向架钢制螺旋弹簧疲劳寿命的因素。     

KZ4A型机车转向架轴重增加后的设计改进

借鉴国内外200km/h等级机车轴重设计经验,通过对机车动力学性能的分析和对转向架主要部件的疲劳强度校核等,提出了KZ4A型机车转向架轴重增加后的设计改进措施。     

电动清扫车清扫作业装置的设计与研究

通过对当前路面清扫车清扫作业装置的分析研究,设计出了一款应用于电动清扫车上的纯扫式清扫作业装置,并通过建立模型,对其主要参数进行了计算和分析。     

B_0-B_0轴式电力机车轴重调簧寻优分析

机车调簧是保证机车轴重分配均匀的重要手段。文章通过对SS4型电力机车以及轴式为B0-B0的电力机车调簧技术进行分析研究,为此类机车达到最优轴重分配提出了相应的调簧寻优思路;同时,对轴式为B0-B0的电力机车,给出了当轴重分配达到部颁标准时机车重心纵向偏离所允许的最大范围。