高速列车在板式轨道上运行时的滚动噪声预测

在已建立的轮轨滚动噪声预测模型的基础上,对"中华之星"高速列车在板式轨道上运行时的轮轨滚动噪声进行了预测分析,结果表明:钢轨辐射的主要是中、高频噪声,车轮辐射的主要是中频噪声,而轨道板则辐射高、中和低频噪声;钢轨噪声最大,车轮次之,轨道板最小。通过对高速列车在板式轨道上运行时产生的轮轨滚动噪声与在有碴轨道上运行时的轮轨滚动噪声比较,发现板式轨道噪声辐射比有碴轨道大4.0dB(A)左右。     

SS7型电力机车轮缘偏磨问题的探讨

结合机车轮缘磨耗的机理及SS7型电力机车设计结构特点,从理论上进行了SS7型电力机车轮缘偏磨问题的分析,并提出了相应的减缓轮缘偏磨的建议措施     

坡道制动条件下840D车轮辐板孔裂纹扩展速率的研究

针对大秦运煤专线840 D车轮辐板孔裂纹情况,就坡道制动工况下从确立车轮载荷条件入手,采用有限元数值模拟机械应力及热应力,然后把计算结果叠加采用断裂力学方法,分析辐板孔边疲劳裂纹萌生和扩展的载荷条件以及裂纹的扩展速率。     

缆索吊支架结构模态分析及抗风静力计算

对拼装时缆索吊机主塔架的动力特性进行分析,并对在最不利风荷载作用下塔架受力及位移情况进行计算,保证缆索吊机主塔架拼装过程中的稳定。     

日产风度A32轿车行驶跑偏故障的诊断与分析

详细介绍了一辆日产风度A32轿车行驶跑偏、方向摆头故障的诊断与排除过程。指出对于麦弗逊式独立悬架,在维修过程中应注意因减振器挠性支撑、下臂胶套和球头的老化及磨损而导致的前轮定位参数失常。     

地铁车辆车轮寿命分析

介绍了影响地铁车辆车轮寿命的主要因素,对广州地铁车辆车轮的使用寿命做了测算,并分析了其运用现状,提出了提高广州地铁车辆轮对寿命的措施。     

Method for obtaining the modal properties of articulated trains equipped with independently rotating wheels

Independently rotating wheels in railway vehicles could represent an alternative to standard technology as a solution to dynamic problems such as hunting instability or steering forces in curves. Among the proposed design solutions, the train with independently rotating wheels and with the most practical applications is that developed by Talgo. The Talgo technology is based on the use of a passive steering technique of the wheelset through a mechanism. The absence of automatic control systems means that a careful selection of the mechanical parameters of the vehicle is required to improve its dynamic characteristics. Aspects such as dynamic stability or the effect of vibration on passenger comfort could be analysed by extracting the modal properties of the train from mathematical models. In this article, a methodology for determining the low-frequency modal properties of articulated trains equipped with independently rotating wheels and passive steering system (Talgo-type) is proposed. The singularity of this application based on the use of non-conventional wheelsets necessarily involves the development of a specific methodology.     

集装箱龙门起重机大车走行机构的设计计算

介绍集装箱龙门起重机六轮大车走行机构的设计思路,说明了轮压与货场基础的关系,对金属结构的受力进行分析,对载荷计算进行归纳总结,选取了校核的工况和主要截面介绍该机电产品的特点。     

激光加工技术在机车制造业中的应用

介绍了激光加工技术在机车制造业中应用的实例,并对能否用激光加工技术解决机车提速后易损件出现的问题进行了分析。     

二十一世纪的Azipod吊舱式电力推进系统

本文叙述了ABB公司的Azipod吊舱式电力推进技术及其发展历史，对一些采用Azipod系统的船舶的运行情况以及最新技术如CompactAzipod和CRP Azipod等的发展作了简要介绍。对电力推进系统中所需控制的关键参数和电站容量，推进为频器选型以及电网谐波畸变等的控制选择方法作了理论上的阐述。