最新刊期
期 3 ， 2017
- 摘要：The wheel standards of ISO, JIS, EN, AAR and the development background of the railway industry standards in the locomotive wheel field were introduced. The steel and technical specifications of TB/T 3469—2016 “Solid forged and rolled wheels for locomotive” were analyzed. For the application of domestic locomotive wheel gradually expanding, improvements and suggestions on TB/T 3469—2016 were proposed based on the accumulated data.关键词：locomotive wheel;wheel standards;TB/T 3469—2016;solid forged and rolled wheel
- 1079
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：A system partition method based on modular theory for EMUs was presented. By considering the basic properties of EMUs components function and application, with the relevant relations definition among components, a comprehensive relation matrix was acquired through analytic hierarchy process, and a mathematical system clustering model was established. Additionally, system partition results applicable to reliability analysis of EMUs were given by population genetic algorithm and MATLAB simulating calculation. The feasibility and effectiveness of this algorithm was verified according to sensitivity analysis, which provided basis for future research.关键词：EMUs;system partition;analytic hierarchy process;population genetic algorithm
- 797
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：In order to improve the anti-disturbance performance and achieve more accurate control effect of MMC-RPC, a dynamic mathematical model was established for the railway static power conditioner (RPC) by using the modular multilevel converter (MMC) structure. Based on the introduction of differential flatness control theory (FBC), two set of outputs were selected from the dynamic mathematical model of MMC-RPC, which enabled MMC-RPC to meet the conditions of the differential flatness system. The structure of the FBC controller had two parts, i.e. feed forward control and error compensation respectively, with cascade connection. The outer loop generated a flat output which was the reference trajectory, and the inner loop generated the d and q axis voltage components which were the expected output of MMC. The simulation result of the MMC-RPC system which was controlled by FBC and PI in 3 working conditions verified the validity and superiority of the FBC control system.关键词：modular multilevel converter;railway static power conditioner;differential flatness;cascade control;proportional integral
- 824
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：The main components and their parameters of AC drive system of the exported Macedon EMUs were introduced. The technical characteristics about lightweight design of the traction converter were mainly described, especially from which secondary resonant circuit was removed, thus dimension and weight of traction converter cabinet could be reduced considerably compared with conventional method. The result of combined test proved that key parameters, such as DC link voltage, temperature rise of traction converter and traction motor and output performance of auxiliary inverter, met the predefined technical requirements. According to the performance in EMUs commissioning and commercial operation, the AC drive system functioned stably and reliably.关键词：EMUs;AC drive system;traction converter;secondary resonant circuit;combined test;Macedon
- 1055
- |
- 11
- |
- 0
发布时间：2021-12-13 - 摘要：The cause of secondary pulsating voltage generating and its impact on the current of the net-side were analyzed, a double closed-loop harmonic suppression algorithm combining notch filter and plug-in odd harmonic repetitive control was presented. Design principle of current controller based on plug-in odd harmonic repetitive control was introduced in details, which achieved steady-state error-free current loop control to suppress odd harmonics of the net-side current by increasing the gain of the fundamental and odd harmonic frequency, and used the notch filter to suppress the effect of pulsating voltage in the voltage loop. Finally, simulation with Matlab showed the effectiveness of the program.关键词：single-phase PWM converter;pulsating voltage;low-order harmonics;notch filter;odd harmonic repetitive controller
- 721
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：In order to make the design of ventilation system for electric locomotives more correct and reasonable, calculations were made to the ventilation system, which focused on the traction motor ventilation system and the machine room micro-positive pressure control, of the AC drive express passenger electric locomotives by combining the digital simulation calculation with traditional experiences. Optimized proposals were also given according to calculation results. Correction factors for design calculation were derived from the comparison drawn between the calculation results and test validation results. It showed that the design calculation of the ventilation system could lay a foundation for design optimization, and shorten the design cycle and reduce test costs.关键词：electric locomotive;ventilation system;traction ventilation;micro-positive pressure;Fluent softwane
- 751
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：The main technical parameters and structure characteristics of the bogie for China-Belarus freight II electric locomotive were presented, and the main components including frame, equipped axle assembly, driving unit assembly, primary suspension, secondary suspension, traction device, basic brake device and wheel flange lubricator etc were described in detail. The locomotive has passed all the test and operation appraisals in Belarus.关键词：China-Belarus freight II electric locomotive;bogie;structure characteristic;wide gauge
- 563
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：Geometric model was created by 3D software and imported into the finite element software ANSYS for finite element modal analysis. The frequencies and modes were compared with unconstrained state and different boundary conditions. The bogie frame of high-speed trains in traveling status was tested and the modal parameters were identified. The weak position of the frame was found based on modal strain energy analysis. The curves of the displacement of nodes at the weak position with the frequency were obtained, providing a scientific basis for the further analysis of the dynamic response and the improvement of the structure.关键词：high-speed bogie;bogie frame;modal analysis;strain energy;harmonic analysis
- 983
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：Technical parameters, main circuit, control method, overall structure and characteristics of air-conditioner power supply for CRH380A EMUs was introduced. At the same time, combined with its particular use environment, some methods of reliability design were elaborated. At last, a series of reliability test was carried out to validate the effectiveness of the design method.关键词：Keywords:air-conditioner power supply;inverter;reliability test;CRH380A EMUs
- 829
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：The rigid-flexible coupling model of axle gear case in tunnel traction locomotive which included the flexible axle and case body was established using Romax, Inventor and Hypermesh software. Tooth profile modification, gear-tooth fatigue strength, bearing life, and the static strength and modal of case body were calculated and analyzed by applying load spectrum to the rigid-flexible coupling model, in which the effects of the flexible deflection, bearing clearance and misalignments were detected and considered. The calculation results and actual practice showed that the rigid-flexible coupling model of axle gear case could be used for developing the product in the design work.关键词：traction locomotive;axle gear case;Romax;rigid-flexible coupling;tooth profile modification;modal
- 862
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：New excitation & auxiliary system for diesel locomotive was introduced in order to fulfill requirement of excitation control and auxiliary system of main and auxiliary integrated generator, the constitute & function and technical innovation was detailed. Stable operation performance and high reliability of the system were proved by test and application.关键词：excitation control;auxiliary system;diesel locomotive;main and auxiliary integrated generator
- 887
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：Rail profile grinding method and profile evaluation index were briefly introduced. Operation ability of the rail grinding machine was identified by test detection and theoretical derivation, and based on the practical application condition, fine operation of the rail grinding machine was realized with the given target rail profile, which provided a method for grinding technology improving.关键词：profile grinding;rail grinding machine;fine operation;rail profile
- 961
- |
- 3
- |
- 0
发布时间：2021-12-13 - 摘要：In order to study the influence of the upper beam structure stiffness change on the car body modal, the detailed finite element model (FEM) of stainless steel passenger car body structure was established. The upper beam was taken as the research object, and the unit mass stiffness change was achieved by changing its unit mass inertia moment. Results showed that: the first-order vertical bending frequency initially increases with the upper beam structure stiffness by logarithmic form, and then enters the gentle stage to remain unchanged, finally increases linearly; the first-order transverse bending frequency initially increases with the upper beam structure stiffness by logarithmic form, and then increases linearly. This study could improve vehicle modal performance, effectively avoiding the external excitation frequency to prevent resonance.关键词：modal performance;moment of inertia;stainless steel car-body;upper beam;structural stiffness;resonance
- 470
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：In the traditional design, the surface heat transfer coefficient of brake resistor mainly came from experience or temperature-rise test data, and was not calculated by formulas. In order to calculate the transient temperature-rise of the brake resistor, and validate the design of the brake resistor, a research on the surface heat transfer coefficient of brake resistor element based on numerical method was carried out, and a model for calculating the transient temperature-rise was built based on surface heat transfer coefficient of steady condition. The influence of heat conduction and radiation heat transfer on brake resistor element temperature-rise was also analyzed. By comparing the results with temperature-rise test, the transient temperature-rise model was verified, which provided a simple and effective method for brake resistor temperature calculation.关键词：brake resistor;surface heat transfer coefficient;numerical method;transient temperature-rise calculation model;temperaturerise test
- 840
- |
- 3
- |
- 0
发布时间：2021-12-13 - 摘要：The frame of general purpose RF power amplifier working in the 2.4 GHz ISM frequency band was introduced. Design of general purse RF power amplifier could be divided into three parts, i.e. design of the detector and comparator, design of the high gain transmit amplifier, and design of the low noise reception amplifier. Test showed that, the power amplifier could reach 21dB transmitreceive gain for the WLAN system whose output power was less than 20 dBm, the power amplifier could satisfy the need of high transmit power and high receive sensitivity in the application of middle-long distance wireless train communication.
- 455
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：Dynamic model was built with 2 HXD1+100 C80 vehicles for the marshaling mode. The table mode of coupler force was established with the in-continuity of smooth unloading over the excessive pattern, and the fuzzy adaptive PID controller was used to control the force deviation and the change rate of the coupler force deviation. The simulation results showed that the actual value of controlled object was consistent with target value. The controller can effectively control the discontinuity of the coupler force loading and unloading process and ensure the safety of train operation based on the accurate dynamic model.关键词：heavy haul train;dynamics;coupler force;fuzzy adaptive PID;control optimization
- 899
- |
- 3
- |
- 0
发布时间：2021-12-13 - 摘要：Structure of floor is one of the main path in which wheel-rail noise and underbody electrical equipment noise transmit to interior of the vehicle. Interior floor is one of the important parts of the whole floor structure, the reasonable design of the sound insulation perfomance is of great significance. Referring to the principle of sound insulation test of insulation material using reverberation room and anechoic room, a simulation analytical model in LMS Virtual.lab of sound insulation index of interior floor with structure of phenolic surface panel-phenolic foam core-phenolic surface panel was built. The difference of sound insulation index between simulation and test was 0.2 dB. It showed that the simulation model had a high precision predicting sound insulation index of interior floor. Using this simulation model, the results of orthogonal experimental design showed that the density of core material was the most important factor affecting sound insulation of the interior floor. The density of core material changed from 230 kg/m3 to 295 kg/m3, and the sound insulation index could meet the requirement of sound insulation index and weight constraint.关键词：hydrogen train;interior floor;sound insulation;phenolic foam panel;orthogonal experimental design
- 515
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：Based on the theoretical and test data calculation, and combining the first and second phase vehicle of Ningbo line 1 operation energy consumption statistical data, the importance of reasonable choice of ground energy recovering equipment capacity to the metro operation and vehicle was evaluated, while the choice of ground regenerative energy absorption equipment capacity was verified, which provided the basis of data fine tuning.关键词：regenerative energy absorption equipment;ground energy recovering equipment;operation energy consumption;capacity choice;metro vehicle
- 997
- |
- 5
- |
- 0
发布时间：2021-12-13 - 摘要：The wheel-rail vibration signal of metro vehicle has the following characteristics: low signal to noise ratio, nonlinear, nonstationary and so on. To achieve better extraction to the fault feature of flat wheel, a fault diagnosis method of metro vehicle flat wheel based on envelop spectrum entropy and Variational Mode Decomposition (VMD) was proposed. Firstly, the simulation signal was used for VMD analysis, comparing with empirical mode decomposition, to illustrate VMD , s effectiveness. Then, the four signals from different condition obtained from experiments were applied for the VMD, to calculate the envelop spectrum entropy of different decomposition modes. Finally, the effect of fault diagnosis was analyzed by support vector machine. The experimental result showed that the proposed method in this paper could effectively achieve the flat wheel fault diagnosis of metro vehicles, which had a good effect on the fault diagnosis of the metro vehicle.关键词：flat wheel fault;variational modal decomposition;envelop spectrum entropy;support vector machine;fault diagnosis;metro vehicle
- 519
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：Compared with the traditional urban rail transit, the rubber-tired tram has great advantage in the design and operating cost, climbing ability, curve negotiation and operating noise. During the operation, lots of the accidents that the puncture wheel, the failure air spring and the defective shock absorber, would happen in the ice and snow weather. Using the SIMPACK multi-body system dynamics software, the dynamic performance of the rubber-tired tram in special condition was analyzed. The analysis results showed that lowering the operating speeds could meet the running stability of the rubber-tired tram in special condition.关键词：rubber-tired tram;special condition;dynamic performance;operation stability
- 780
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：A MVB network communication fault that occurred during the test run of Changsha maglev train was discussed , abnormal oscillation of the last MVB signal frame was found to be the direct reason. According to the theory of transmission lines, and combining with the analysis of oscillation phenomenon, this paper points out that the poor contact in the equipment of MVB network was the root cause. Through the theoretical formula and simulation modeling, the major factors that might cause a similar fault were researched, and the fault phenomenon was explained comprehensively. It also provides important reference value for the improvement of the EMC and reliability of train network communication system.关键词：Changsha maglev train;MVB;oscillation;reflection;EMC
- 1036
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：Traction speed sensor’s fault can cause the impact of the train, or even loss of traction, seriously affecting the comfort and safety of metro vehicle travelling. Based on the dynamic model of induction motor, the open-loop speed estimation method was deduced, and the pros and cons of open-loop speed identification were analyzed; then a model reference adaptive speed estimation method for fault diagnosis and auto-tolerant control after the speed sensor fault was proposed. The method was validated in Wuxi metro, which could rapid diagnosis the speed sensor fault and realize auto-tolerant control, ensuring the safe and reliable operation of the metro vehicles.关键词：induction motor;open-loop speed estimation method;fault diagnosis;model reference adaptive;auto-tolerant control
- 812
- |
- 4
- |
- 0
发布时间：2021-12-13 - 摘要：Aiming at the characteristics of embedded software and the defects of existing test environment, a general test platform based on dSPACE plus fault injecting system was proposed, which could fulfill the requirement of real-time simulation, automatic test, test management and fault injection. The system structure, principle and function of the platform were introduced, and with the practice of DCU software test cases, the platform was validated that could improve the test efficiency and quality.关键词：embedded software;real-time simulation;automatic test;test management;fault injection
- 899
- |
- 3
- |
- 0
发布时间：2021-12-13 - 摘要：According to the theory of experimental modal analysis (EMA), SIMO analysis method, multi-reference point modal test, experimental modal test and modal parameters identification of the scaled 1:8 car-body’s sidewall were conducted. The test model was built on depending on the proportion of body dimensions; Sensors were arranged and modal test parameters were set; Data collection and analysis were conducted by using hammering method and DHDAS software system, and first four elastic modal parameters and the corresponding mode of its sidewall were obtained by using the Polylscf modal extraction. The results showed that: the 1st modal of the sidewall was 61.6 Hz; the second modal was 120 Hz; the third modal was 125.5 Hz; the fourth modal was near to 139 Hz. By comparing different input type, the 1th modal of scaled car-body was not sensitive to the position of input, the amplitudes of the 2nd, 3rd and 4th modal for the sidewall input were bigger than the case of the roof input, the maximum difference was 5.132 m/s2/N, so this case was sensitive to the position of the input. Signal spectral components were consistent with the modal frequencies, which verified that the results were correct.关键词：scaled car-body;sidewall;experimental modal analysis;SIMO;high-speed vehicles
- 742
- |
- 2
- |
- 0
发布时间：2021-12-13 - 摘要：In order to assess locomotive converter module’s ability to resist vibration environment, random vibration test should be made by the standard GB/T 21563—2008 in Class 1 B grade. This standard was summarized according to the European railway statistics derived from a large number of measured data. However, random vibration environment between European railway and our railway was different. Locomotive converter module random vibration acceleration data on the Beijing-Guangzhou line and the Lanzhou-Wulumuqi line were measured, induced, and calculated, acceleration power spectral density curve and acceleration root value were obtained. Finally, we proved that locomotive converter module measured random vibration test profile type and acceleration r.m.s. had some differences to the standard.关键词：converter modules;random vibration test;measured data;test specification
- 743
- |
- 4
- |
- 0
发布时间：2021-12-13
- Technical support is provided by Beijing Founder electronics co., LTD 湘ICP备20010475号-1
京公网安备11010802024621 - It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
- Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.
0