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城市轨道车辆架控制动装置故障及可靠性研究

铁道机车车辆 2024年第1期44卷 150-156页

作者：孟繁辉尚小菲高靖添马永靖曲志及杨东中车长春轨道客车股份有限公司长春130062

制动控制装置是制动系统的核心部件,其故障情况直接影响地铁车辆运营的可靠性和安全性。文中针对应用相对广泛的架控制动装置,从结构原理分析其故障影响,并通过对既有分布在6个城市的12个地铁列车项目近3年的故障数据进行分析,确定故障... 详细信息

制动控制装置是制动系统的核心部件,其故障情况直接影响地铁车辆运营的可靠性和安全性。文中针对应用相对广泛的架控制动装置,从结构原理分析其故障影响,并通过对既有分布在6个城市的12个地铁列车项目近3年的故障数据进行分析,确定故障分布和故障影响,并开展可靠性计算。同时对典型故障从设计、制造多角度进行分析,为提升架控制动装置的可靠性和安全性提出了解决措施。

关键词：城市轨道车辆架控制动控制装置可靠性研究

Optical Properties and Source Analysis of Aerosols over a Desert Area in Dunhuang,Northwest China

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Advances in Atmospheric Sciences 2017年第8期34卷 1017-1026页

作者： yongjing ma Jinyuan XIN Yining ma Lingbin KONG Kequan ZHANG Wenyu ZHANG Yuesi WANG Xiuqin WANG Yongfeng ZHU College of Atmospheric Sciences Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu ProvinceLanzhou UniversityLanzhou 730000China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China College of Atmospheric Sciences Chengdu University of Information TechnologyPlateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceChengdu 610225China Dunhuang Meteorological Bureau Dunhuang 736200China

Aerosol observational data for 2012 obtained from Dunhuang Station of CARE-China（Campaign on Atmospheric Aerosol Research Network of China） were analyzed to achieve in-depth knowledge of aerosol optical properties over Dunhuang region. The results showed that the annual average aerosol optical depth（AOD） at 500 nm was 0.32 ± 0.06, and the ？ngstr？m exponent（α） was 0.73 ± 0.27. Aerosol optical properties revealed significant seasonal characteristics. Frequent sandstorms in maM（march–April–may） resulted in the seasonal maximum AOD, 0.41 ± 0.04, and a relatively smaller αvalue, 0.44 ± 0.04. The tourism seasons, JJA（June–July–August） and SON（September–October–November） coincide with serious emissions of small anthropogenic aerosols. While in DJF（December–January–February）, the composition of the atmosphere was a mixture of dust particles and polluted aerosols released by domestic heating; the average AOD and αwere 0.29 ± 0.02 and 0.66 ± 0.17, respectively. Different air masses exhibited different degrees of influence on the aerosol concentration over Dunhuang in different seasons. During maM, ranges of AOD（0.11–1.18） and α（0.06–0.82） were the largest under the dust influence of northwest-short-distance air mass in the four trajectories. Urban aerosols transported by northwest-short-distance air mass accounted for a very large proportion in JJA and the mixed aerosols observed in SON were mainly conveyed by air masses from the west. In DJF, the similar ranges of AOD and α under the three air mass demonstrated the analogous diffusion effects on regional pollutants over Dunhuang.

关键词： Dunhuang AOD ?ngstr?m exponent dust aerosol anthropogenic aerosols

Optical,Radiative and Chemical Characteristics of Aerosol in Changsha City,Central China

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Advances in Atmospheric Sciences 2020年第12期37卷 1310-1322,I0005-I0011页

作者： Xiaoyan WU Jinyuan XIN Wenyu ZHANG Chongshui GONG Yining ma yongjing ma Tianxue WEN Zirui LIU Shili TIAN Yuesi WANG Fangkun WU College of Atmospheric Sciences Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu ProvinceLanzhou UniversityLanzhou 730000China State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science&TechnologyNanjing 210044China

Industrial pollution has a significant effect on aerosol properties in Changsha City,a typical city of central ***,year-round measurements of aerosol optical,radiative and chemical properties from 2012 to 2014 at an urban site in Changsha were *** the observation period,the energy structure was continuously optimized,which was characterized by the reduction of coal *** aerosol properties have obvious seasonal *** seasonal average aerosol optical depth(AOD)at 500 nm ranged from 0.49 to 1.00,single scattering albedo(SSA)ranged from 0.93 to 0.97,and aerosol radiative forcing at the top of the atmosphere(TOA)ranged from−24.0 to 3.8 W m^−*** chemical components also showed seasonal ***,the scattering aerosol,such as organic carbon,SO42−,NO3−,and NH4+showed a decrease,and elemental carbon *** with observation in winter 2012,AOD and TOA decreased by 0.14 and−1.49 W m^−2 in winter *** scattering components,SO42−,NO3−and NH4+,decreased by 12.8μg m^−3(56.8%),9.2μg m^−3(48.8%)and 6.4μg m^−3(45.2%),*** atmospheric visibility and pollution diffusion conditions *** extinction and radiative forcing of aerosol were significantly controlled by the scattering *** results indicate that Changsha is an industrial city with strong scattering *** energy structure optimization had a marked effect on controlling pollution,especially in winter(strong scattering aerosol).

关键词： aerosol optical properties radiative forcing chemical composition

城镇燃气埋地PE管道环向弯曲应力、变形与稳定性分析

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城市燃气 2024年第7期 4-8页

作者：张文强黎洪义肖思李晶晶马永璟北京市燃气集团有限责任公司第三分公司北京燃气怀柔有限公司北京市燃气集团有限公司责任公司第四分公司北京市房山区城市管理委员会

为了保证城镇燃气埋地PE管道的安全运行,应重点评定其环向弯曲应力、变形与稳定性,本文首先给出了埋地PE管道的受力情况及荷载的计算方法,然后重点介绍了埋地PE管道环向弯曲应力、变形与稳定性的评定方法,最后结合典型计算案例,考虑不... 详细信息

为了保证城镇燃气埋地PE管道的安全运行,应重点评定其环向弯曲应力、变形与稳定性,本文首先给出了埋地PE管道的受力情况及荷载的计算方法,然后重点介绍了埋地PE管道环向弯曲应力、变形与稳定性的评定方法,最后结合典型计算案例,考虑不同管材系列、埋深、回填土密实度等因素进行对比分析,探讨影响埋地PE管道安全运行的主要因素,研究结果可为城镇燃气埋地PE管道的安全运行提供一定的技术支撑。

关键词：城镇燃气埋地 PE管道环向弯曲应力变形稳定性安全运行

高速动车组停放制动状态冗余监控方案设计研究

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铁道车辆 2024年第2期62卷 50-54,83页

作者：马永靖郑魏婧李松张笑凡高靖添王磊王志龙中车长春轨道客车股份有限公司吉林长春130062

系统介绍了高速动车组停放制动设计的功能要求、系统组成、控制原理、既有停放制动状态监控及显示方案;针对高速动车组运行中停放制动意外施加的问题,进行了仿真分析,提出了一种停放制动状态冗余监控优化方案,并重点阐述了基于单车停放... 详细信息

系统介绍了高速动车组停放制动设计的功能要求、系统组成、控制原理、既有停放制动状态监控及显示方案;针对高速动车组运行中停放制动意外施加的问题,进行了仿真分析,提出了一种停放制动状态冗余监控优化方案,并重点阐述了基于单车停放制动冗余监控和单元内“伙伴车”停放制动冗余监控的停放制动状态监测、故障诊断及显示的实施方案。该方案可有效解决因压力传感器、停放制动监控单元或通信故障导致的误报、漏报停放制动意外施加故障。

关键词：高速动车组停放制动意外施加监控方案优化

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我国高速动车组撒砂装置现状及发展趋势

铁道车辆 2024年第1期62卷 157-160页

作者：胡淼王善方董光进马永靖张方亮李新康中车青岛四方车辆研究所有限公司制动事业部山东青岛266031 中车长春轨道客车股份有限公司国家轨道客车工程研究中心吉林长春130062

文章介绍了我国和谐号、复兴号高速动车组撒砂装置的现状以及近几年国外撒砂装置最新研制情况,并在此基础上预测了我国高速动车组撒砂装置未来技术发展趋势。

关键词：动车组撒砂装置现状发展趋势

Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode

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Journal of Energy Chemistry 2024年第4期91卷 122-131页

作者： Xingxing Jiao Xieyu Xu yongjing Wang Xuyang Wang Yaqi Chen Shizhao Xiong Weiqing Yang Zhongxiao Song Yangyang Liu Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031SichuanChina State Key Laboratory for Mechanical Behavior of materials Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Chalmers University of TechnologyGöteborgSE 41296Sweden

Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 ma h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and ***,its applications are still challenged by plenty of technical and scientific *** this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of ***,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak ***,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety.

关键词： All-solid-state lithium metal battery LiNi_(0.5C)o_(0.2)Mn_(0.3)O_(2)-Li7La_(3)Zr_(2)O_(12)composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure

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碰撞振动系统的参数自调节混沌控制

振动与冲击 2007年第1期26卷 24-26,30,34页

作者：马永靖丁旺才杨小刚兰州交通大学机电工程学院兰州730070

针对含间隙碰撞振动系统由于系统参数的变化,发生分岔和混沌这一实际情况,提出了系统参数依据系统输出的变化自动调节连续反馈控制的策略。给出了参数自调节的控制律,选取适当的控制强度向量,混沌运动可被引导到稳定的目标周期轨道。对... 详细信息

针对含间隙碰撞振动系统由于系统参数的变化,发生分岔和混沌这一实际情况,提出了系统参数依据系统输出的变化自动调节连续反馈控制的策略。给出了参数自调节的控制律,选取适当的控制强度向量,混沌运动可被引导到稳定的目标周期轨道。对一两自由度含间隙碰撞振动系统进行数值模拟,验证了这一策略的有效性。

关键词：碰撞振动混沌控制参数自调节反馈控制

物联网环境下机械产品装配过程多源信息感知与交互标准

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中国机械工程 2016年第23期27卷 3176-3183页

作者：马永敬刘明周文勃凌琳中车青岛四方机车车辆股份有限公司青岛266111 合肥工业大学合肥230009

在机械产品装配过程中信息的产生具有多源异构性,装配过程中产生的大量多源信息给信息交互带来了很大的困难。在分析机械产品装配过程信息通信中存在的信息交互困难和应用多源信息感知技术的基础上,提出了一种适用于机械产品装配过程信... 详细信息

在机械产品装配过程中信息的产生具有多源异构性,装配过程中产生的大量多源信息给信息交互带来了很大的困难。在分析机械产品装配过程信息通信中存在的信息交互困难和应用多源信息感知技术的基础上,提出了一种适用于机械产品装配过程信息的交互标准,重点阐述了该交互标准的交互形式、交互结构以及该交互标准在装配过程中的通信过程;最后,结合该交互标准在某汽车发动机装配过程中的应用,展现了该交互标准在实际应用中所表现出来的特点,证明了该信息交互标准具有可应用性。

关键词：物联网多源信息感知交互标准装配过程