Sound insulation quality of the windows for high speed train

2003 ◽  
Vol 2003.12 (0) ◽  
pp. 37-40 ◽  
Author(s):  
Masahiko HORIUCHI ◽  
Katufumi HASHIMOTO ◽  
Hitoshi SHIRAISHI ◽  
Satoru AKIYAMA ◽  
Yasufumi MINAMIMOTO
Keyword(s):  
High Speed ◽  
Sound Insulation ◽  
High Speed Train ◽  
Insulation Quality

Study on Evaluation Method of High-Speed Train Based on Bipartite Graph

2013 ◽  
Vol 364 ◽  
pp. 843-848
Author(s):  
Ling Xuan Li ◽  
Yuan Yua Ma ◽  
Zi Liang Liu
Keyword(s):  
Resource Allocation ◽  
Bipartite Graph ◽  
High Speed ◽  
Evaluation Method ◽  
High Speed Train ◽  
Key Factors ◽  
Performance Indices ◽  
High Speed Trains ◽  
High Influence

Based on the resource allocation method of bipartite graph projected to one-mode graph, the bipartite graph network is established using six evaluating comfortableness indices and seven subsystems of high-speed train as the vertices. Our research shows that: This method can be used to find out the key factors which have high influence on the high-speed trains comprehensive comfortableness; also its ratio can be obtained. The overall quality of the high-speed train also can be forecasted by this method if the seven subsystems performance indices are given. Meanwhile, the interacting dependency level among the indices can be obtained.

The Performance Analysis of Different Topology Structures of High-Speed Train Based on Industrial Ethernet

2014 ◽  
Vol 687-691 ◽  
pp. 2379-2382
Author(s):  
Chong Hui Ren ◽  
De Qiang He
Keyword(s):  
Network Topology ◽  
Network Structure ◽  
High Speed ◽  
Reference Value ◽  
Industrial Ethernet ◽  
High Speed Train ◽  
Network Topologies ◽  
Application Data ◽  
Ladder Network

The industrial Ethernet technology has been gradually applied to the high-speed train. However, different network topologies can have big impact on the quality of communication. The real-time and reliability performances of the high-speed train to which three kinds of network topology structures of the linear, the ring and the ladder are applied based on industrial Ethernet are analyzed in theory according to IEC61375(2009). Four kinds of application data are built to modify the data transmission in this paper. The three structures are simulated with the OPNET modeler. Afterwards, the network performances are compared in the simulation. At last, a conclusion that the performance of the ladder network structure is superior to that of the linear and the ring network structure is drew. The results of the study could provide the reference value of the construction and majorization of the network topology structure based on the industrial Ethernet.

The Effect of Single Pulse, Double Pulse and ForceArc MIG Welding Technology on Mechanical Properties of Welding Joint for 5083 Aluminum Alloy Used in High-Speed Train Body

2011 ◽  
Vol 337 ◽  
pp. 460-465
Author(s):  
Lei Su ◽  
Yuan Nie ◽  
Hua Ji ◽  
Chuan Ping Ma ◽  
Shao Hua Yan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
High Speed ◽  
Single Pulse ◽  
Double Pulse ◽  
High Speed Train ◽  
Welding Joint ◽  
5083 Aluminum Alloy ◽  
Very High

The technology of lightening manufacture for aluminum alloy train body is one key of manufacturing high-speed train . The train body is a whole bearing loading tubular structure which is welded together by the large, hollow, thin-walled aluminum extrusion. Therefore，the demand for welding quality of aluminum alloy train body is very high，and the mechanical properties of joints severely affected the overall strength of welded components. To solve this problem ,we use the 421 EXPERT forceArc MIG of PHOENIX series of German EWM company to perform three types of experiments of single pulse, double pulse, and forceArc welding ,and then effect of three welding methods on mechanical properties of Welding joint for 5083 aluminum alloy used in high-speed train body is compared.

Research on the Failure Mechanism of Flash Welded Rail

2011 ◽  
Vol 314-316 ◽  
pp. 1100-1106
Author(s):  
Yong Hui Zhu ◽  
Hui Chen ◽  
Zhong Yin Zhu ◽  
Chuan Ping Ma ◽  
Li Jun Wang ◽  
...  
Keyword(s):  
Failure Mechanism ◽  
High Speed ◽  
Fatigue Cracking ◽  
High Speed Train ◽  
Joint Fracture ◽  
Calcium Aluminates ◽  
Welding Joints ◽  
Train Safety ◽  
Flash Welding

For the high speed train, safety is the most important factor. Flash welding is the primary technology for the seamless line rail in Chinese railway. So the quality of the flash welded joints is the most important. This paper presents the situation of joint fracture in rail flash welding joints and analyses the failure mechanism through macroscopic and microscopic observation. The result demonstrate that the cracking of the rail is fatigue-crack propagation，the fatigue cracking is caused by alumina calcium-Aluminates-non-metallic inclusion．

scholarly journals A Systematic Approach to Identify Sources of Abnormal Interior Noise for a High-Speed Train

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Jie Zhang ◽  
Xinbiao Xiao ◽  
Xiaozhen Sheng ◽  
Zhihui Li ◽  
Xuesong Jin
Keyword(s):  
High Speed ◽  
Sound Pressure ◽  
Systematic Approach ◽  
Noise Analysis ◽  
Interior Noise ◽  
Sound Insulation ◽  
High Speed Train ◽  
Main Contributor ◽  
Vibration Data ◽  
High Speed Trains

A systematic approach to identify sources of abnormal interior noise occurring in a high-speed train is presented and applied in this paper to resolve a particular noise issue. This approach is developed based on a number of previous dealings with similar noise problems. The particular noise issue occurs in a Chinese high-speed train. It is measured that there is a difference of 7 dB(A) in overall Sound Pressure Level (SPL) between two nominally identical VIP cabins at 250 km/h. The systematic approach is applied to identify the root cause of the 7 dB(A) difference. Well planned measurements are performed in both the VIP cabins. Sound pressure contributions, either in terms of frequency band or in terms of facing area, are analyzed. Order analysis is also carried out. Based on these analyses, it is found that the problematic frequency is the sleeper passing frequency of the train, and an area on the roof contributes the most. In order to determine what causes that area to be the main contributor without disassembling the structure of the roof, measured noise and vibration data for different train speeds are further analyzed. It is then reasoned that roof is the main contributor caused by sound pressure behind the panel. Up to this point, panels of the roof are removed, revealing that a hole of 300 cm2 for running cables is presented behind the red area without proper sound insulation. This study can provide a basis for abnormal interior noise analysis and control of high-speed trains.

scholarly journals Analysis of Effect of Pantograph Cover on the Current Collection Quality of High Speed Train using Real Train Experiment

2016 ◽  
Vol 19 (4) ◽  
pp. 409-416
Author(s):  
Hyuck Keun Oh ◽  
Seogwon Kim ◽  
Yong-hyun Cho ◽  
Minho Kwak ◽  
Sam Young Kwon
Keyword(s):  
High Speed ◽  
High Speed Train ◽  
Current Collection

scholarly journals Dynamic Control of High-speed Train Following Operation

2014 ◽  
Vol 26 (4) ◽  
pp. 291-297 ◽  
Author(s):  
Deng Pan ◽  
Yingping Zheng
Keyword(s):  
Real Time ◽  
Collision Avoidance ◽  
High Speed ◽  
Dynamic Control ◽  
Behavioral Adjustment ◽  
Control Law ◽  
High Speed Train ◽  
Velocity Difference ◽  
Time Calculation

Both safety and efficiency should be considered in high-speed train following control. The real-time calculation of dynamic safety following distance is used by the following train to understand the quality of its own following behavior. A new velocity difference control law can help the following train to adjust its own behavior from a safe and efficient steady-following state to another one if the actual following distance is greater than the safe following distance. Meanwhile, the stopping control law would work for collision avoidance when the actual following distance is less than the safe following distance. The simulation shows that the dynamic control of actual inter-train distance can be well accomplished by the behavioral adjustment of the following train, and verifies the effectiveness and feasibility of our presented methods for train following control.

scholarly journals Sound Insulation Strategy for the Tunnel Noise in a High Speed Train

2012 ◽  
Vol 15 (4) ◽  
pp. 315-322 ◽  
Author(s):  
Seock-Hyun Kim ◽  
Ho-Jin Lee ◽  
Jung-Tae Kim
Keyword(s):  
High Speed ◽  
Sound Insulation ◽  
High Speed Train

Design an Effective Solution for Stretch Forming of Sheet Metal with a Shorter Free Edge

2013 ◽  
Vol 395-396 ◽  
pp. 941-944
Author(s):  
Qi Gang Han ◽  
Qiang Zhang ◽  
Ming Zhe Li ◽  
Shi Zhong Su ◽  
Wen Ke Yang ◽  
...  
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Free Edge ◽  
Effective Solution ◽  
High Speed Train ◽  
Stretch Forming ◽  
High Quality ◽  
Forming Technology ◽  
Element Simulation

To remove the disadvantage of conventional stretch forming machine (CSFM), a flexible stretch forming machine (FSFM) has been developed by authors recently. Based on finite element simulation and experiments, the advantages of FSFM have been detailed discussed. Our results indicated that the discrete multi-gripping jaws can swing and rotate in any direction automatically, which can solve the wasteful production of CSFM by increase the rate of materials utilization and close-fitting dies. Furthermore, the value of springback and thickness gradient in the parts formed by discrete multi-gripping jaws is smaller compare with that of integrally gripping jaws, which can help to achieve a high quality of stretch forming parts. A series of double-curved sheet panels have been formed by FSFM easily and used in the cabinet covers of high-speed train and the Dongdaemun Design Park building successfully. This work has a strong value in enhance the way to flexible and reproducible stretch forming technology.

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