广州地铁车辆内装设计

对广州地铁4、5号线车辆的内装饰设计,即客车顶板、侧、端墙板、地板,客室和司机室座椅、客室扶手立柱吊环、车窗,司机室前窗、后端门、司机室和客室侧门等,进行了简要地介绍。针对该城市的自身特点,从结构的设计和色调的搭配,设计出了符合该城市自身特点的轨道车辆。     

几种城轨车辆车门装配与密封性的对比分析与研究

通过对近几年我公司及国内某特大型城市轨道交通车辆制造商生产的城轨车辆项目所采用的客室门种类统计;同时结合车门的结构特点,对客室塞拉门、客室内藏门、客室外挂门等三种常见类型车门在装配生产过程中的装配重难点、密封性要点进行分析和对比。为主机厂车辆制造,以及用户在车辆的采购选择等方面提供参考。     

基于地铁车辆定频和变频空调能耗及舒适性研究

郑州地铁9号线0927车采用定频和变频两种形式的空调，通过空调能耗对比和客室温度变化曲线，对城市轨道交通地铁车辆的空调能耗及客室舒适性进行探讨。研究结果表明：变频空调平均节电率达到6.48%，且车厢内的温度控制精度高、波动范围小，在地铁列车上具有更好的经济效益和发展前景。     

高速列车车内流场数值分析及优化

应用FLUENT软件对某高速列车客室内的流场和温度分布进行了数值模拟,基于非稳态k-w湍流模型,分别对夏季、冬季送风情况下客室内的温度分布进行分析。研究结果表明,客室空调原送风孔对应的流场和温度分布不能满足客室舒适性要求。通过优化客室送风孔孔径,流场和温度分布的计算结果基本满足客室舒适性要求。根据以上的仿真计算结果对该高速列车的通风系统提出了合理的改进建议。     

广州地铁二号线A5型车空调能耗及客室舒适性调查与分析

广州地铁二号线A5型车现采取定频及变频空调两种形式,通过能耗对比试验和基于载荷变化的温度曲线控制试验,对城轨地铁车辆空调能耗及客室舒适性进行调查、研究和分析,提出了实现车辆客室舒适性和降低列车能耗二者平衡的可行性方案。     

地铁车客室车门运营常见故障及解决方案

分析重庆某线路地铁车客室车门(康尼车门系统)运营过程中发生的典型故障,介绍相同结构的车门在其他线路发生影响较大的故障时根据维修手册的指导方法进行故障排查处理的经验,提出每种故障相应的解决方案.经实践检验,措施合理有效.结合分类分析了客室车门系统出现的几种典型故障,以提高车辆维修专业人员的业务技能水平,并优化故障处理方案,有效降低地铁客室车门系统故障发生的概率,使地铁车辆处于安全、稳定的运行中,也为今后城轨车辆门系统故障处理提供了参考.     

DKZ4型车辆安装客室空调可行性研究

原有的DKZ4型车辆未考虑安装客室空调,所以其原车体结构及车内设备布置对空调系统的安装产生了很大限制。最主要的限制是空调机组的高度和风道的布置。因此给DKZ4车辆加装空调机组时,其选型、空调机组及辅助设备的布置要充分考虑原车体钢结构强度、刚度、车内设备安装、检修空间、客室净空高、车辆辅助电源容量及钢结构焊接工艺性等因素的影响。文中根据DKZ4车辆的原有特征,分析了包括空调系统的设计选型、设备布置、风道阻力、客室温度场、气流组织分布、钢结构制造工艺性等各方面的因素,研究了其安装空调的可行性,并给出了空调安装的可行性方案。     

沈阳地铁电客车门控器便携检测装置

地铁车辆的客室车门是地铁运营中使用最多的车辆设备之一,造成地铁车门控制器故障率比较高,更换频繁。从而对车辆维修单位造成很大的维修成本。文章从地铁车辆的车门控制器故障出发,描述了地铁车门控制器检测装置研究成果。     

广佛线列车整侧客室车门无法关闭故障分析及解决方案

针对广佛线地铁车辆运营过程中,由于车门控制电路设计缺陷及继电器选型错误导致整侧客室车门无法关闭的故障进行了详细分析,并提出了解决方案,保证了列车的正常运营。     

城铁车辆复合出风技术设计与实现探究

基于新兴的城铁车辆空调系统复合出风的功能需求,本文通过三种复合出风技术在客室气流组织、吹冷感、外观、维护难度和实现成本等方面的理论分析,选定综合最优方案进行实车设计应用。随后,进行CFD仿真分析和试验分析,得出复合出风技术可有效减缓乘客头部的"吹冷感",提高客室内舒适区的气流组织和温度均匀性,减少送风短路;但同时,复合出风的应用也会增加送风装置的总体阻力,稍微降低总体送风量。     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

Quantum Cooperative Robotics and Autonomy

The intersection of Quantum Technologies and Robotics Autonomy is explored in the present paper.The two areas are brought together in establishing an interdisci...     

On the Relation of Load to Average Gap in the Contact Between Surfaces with Longitudinal Roughness

A computer simulation model for the contact between longitudinally-oriented rough surfaces has been formulated. This model closely duplicates the actual surf ace contact deformation behavior by taking into account the elastic interactions between the asperities. There were no assumptions made about the shapes, or any deformation behavior of the asperities, except for their obeying the laws of elasticity. The plastic deformations on the high asperity peaks were taken into account by setting a ceiling on their contact pressures at the material hardness value. The simulations used real surface profiles which were digitized from unworn circumferentially ground steel surfaces. Each pair of these profiles was mathematically combined to form an equivalent rough profile pressing against an infinitely rigid flat and having the appropriately adjusted elastic modulus. A total of 28 different pairs of profiles were used in the simulations. Each contacting pair was subjected to 30 different load levels and the local contact pressures and deformations were calculated. The contact simulations yielded some important mathematical relationships between parameters, such as the real area of contact, average gap, and average asperity load through statistical curve fitting. Two analytical functions were generated to relate the average load to average gap and the real area of contact to load.     

三绕组变压器的双绕组等效建模及在Matpower中的应用

针对实际电网存在着大量的三绕组变压器,但国际上一些著名商业软件,如BPA仿真软件、Matpower这一权威潮流计算开源软件,均只提供双绕组变压器模型,限制了其在具有三绕组变压器的电力系统中的应用的问题,潮流计算是自主开发的电力系统各种应用软件的核心模块,因此依托国际权威开源程序进行二次开发,是一种较好的选择。对Matpower要求的数据格式进行了归纳,对变压器的一般的等值电路及带理想变压器的等值电路和带标幺值的等值电路进行了分析研究,提出了三绕组变压器转换为双绕组等效模型的建模方法,使得原先只适应双绕组变压器的潮流计算软件可以适用于三绕组变压器电网的潮流计算;最后以Matpower软件为例进行了案例计算,并用PSASP仿真软件进行对比验证。研究结果证明,所提出的建模方法是有效的。     

电站锅炉模糊风险评价方法研究与应用

针对电站锅炉风险等级评价问题,将模糊综合评价技术应用到电站锅炉风险等级评价中。开展了电站锅炉失效影响因素及模糊评价因素的重要程度分析,建立了一套科学合理适于在线评价的电站锅炉风险评价体系,提出了模糊综合评价技术与改进的模糊层次分析法相结合的模糊风险评价方法,利用改进的模糊层次分析法计算了指标体系中各层指标权重。对某一台电站锅炉的实际运行工况影响子因素进行了模糊风险评价,采用模糊合成算子进行模糊综合运算得到电了站锅炉运行工况影响子因素的评价向量。研究结果表明:电站锅炉的运行工况影响子因素的风险评价等级为第6级,失效可能性等级为小,该电站锅炉运行工况良好。     

考虑进油孔有限长滑动轴承油膜力的近似解析解

针对具有进油孔的有限长滑动轴承油膜力求解问题,采用变分原理和分离变量法,求得了有限长滑动轴承油膜压力分布的近似解析表达式。将油膜压力分布的近似解析表达式在油膜存在区域上进行积分,即得到了油膜力。将提出的计算有限长滑动轴承油膜力方法与无限长轴承模型、有限元方法的计算结果进行了比较,发现了提出的方法与有限元方法的计算结果很接近。最后,研究了进油孔位置和进油压力对油膜存在区域、油膜力等的影响,研究结果表明进油孔位置和进油压力对油膜存在区域和油膜力有较大的影响。     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

交通荷载作用下桥梁结构参数识别方法

应用动力节点加载法,将作用在桥梁上的交通荷载转化为等效节点荷载,再用两步构造法识别结构物理参数.第1步,用Newmark-β方法变换结构运动方程,并用结构的加速度响应求得变换空间内的位移、速度和加速度响应;第2步,基于最小二乘原理,构造出变换空间内求解结构参数的递推式,进行结构物理参数识别.数值模拟结果表明,在交通荷载作用下,该方法能够快速、准确地进行桥梁结构参数识别.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....