Fixture Locating Modelling and Optimization Research of Aluminum Alloy Sidewall in a High-Speed Train Body

2020 ◽  
Vol 25 (6) ◽  
pp. 706-713
Author(s):  
Xianjin Wang ◽  
Xu Gao ◽  
Kuigang Yu
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
High Speed Train ◽  
Modelling And Optimization

Failure Analysis of a Welded Aluminum Alloy Component in High-Speed Train

2011 ◽  
Vol 337 ◽  
pp. 670-673
Author(s):  
Yong Hui Zhu ◽  
Wei Zhou ◽  
Yuan Nie ◽  
Zhong Yin Zhu ◽  
Hui Chen ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Stress Concentration ◽  
Failure Analysis ◽  
High Speed ◽  
Propagation Speed ◽  
Element Distribution ◽  
High Speed Train ◽  
Alloy Component ◽  
Stress Concentration Region ◽  
Weld Toe

In this paper, a failure analysis is made to a welded aluminum alloy component of the equipment by module below the high-speed train. Making force analysis to the welded components by finite element, microscopic morphology observation and element distribution measurement of the fracture surface are done by the scanning electron microscopy and spectroscopy .It is determined that the main reason of fracture of welded components was that stress concentration exist in the working conditions, and the weld toe is the most severe stress concentration region. The stress concentration causes the fatigue microcrack, and under the action of repeated external force crack propagates and then crack. Lacking of penetration sites is under tensile residual stress, the crack propagation speed, and soon to instability and then broken.

FEM for Brake Discs of SiC 3D Continuous Ceramic Reinforced 7075 Aluminum Alloy for CRH3 Trains Applying Emergency Braking

2011 ◽  
Vol 120 ◽  
pp. 51-55 ◽  
Author(s):  
Liang Yu ◽  
Yan Li Jiang ◽  
Sen Kai Lu ◽  
Hong Qiang Ru ◽  
Ming Fang
Keyword(s):  
Aluminum Alloy ◽  
Thermal Stress ◽  
High Speed ◽  
Distribution Model ◽  
Transient Temperature ◽  
Brake Disc ◽  
Three Dimension ◽  
High Speed Train ◽  
Emergency Braking ◽  
Aluminum Alloy 7075

The shaft disc prepared with SiC 3D continuous ceramic frame reinforced aluminum alloy 7075 (3D-SiC/Al) composite of the CRH3 high speed train with a speed at 250 km/h was chosen as the research object, and the course of emergency brake was simulated by Cosmos. A three dimension model was established, the way of applying loads were discussed, and the temperature field and thermal stress field were obtained. The result shows that the highest temperature appears at about 57 s since braking and the value is about 373 °C. The biggest stress is about 237 MPa, appearing at about 51 s since braking, the regions distribute at the surface corresponding with the radiating ribs, and near the inner diameter. The hoop stress is larger than other directions. The result shows that the thermal stress duce to the transient temperature distribution model is released well for the distribution of the 3D continuous ceramic frame reinforced aluminum alloy 7075 structure compares with the conventional brake disc, which can satisfy the requirement of the shaft disc of the high speed train with a speed at 250 km/h applying emergency braking.

scholarly journals Tensile and Fatigue Properties of 7050 Aluminum Alloy Axle Box used for High Speed Train

2012 ◽  
Vol 27 ◽  
pp. 914-922 ◽  
Author(s):  
Xuechong Ren ◽  
Lixin Zhang ◽  
Yingfeng Chen ◽  
Fengyan Sun ◽  
Weidong Zhang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
High Speed ◽  
Fatigue Properties ◽  
High Speed Train ◽  
7050 Aluminum Alloy

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.

scholarly journals Vibration Analysis of Composite Multilayer Floor of High-Speed Train

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Ying Han ◽  
Wenjing Sun ◽  
Jinsong Zhou ◽  
Dao Gong
Keyword(s):  
Stainless Steel ◽  
Aluminum Alloy ◽  
High Speed ◽  
Vibration Isolation ◽  
Vibration Response ◽  
Core Material ◽  
High Speed Train ◽  
Panel Thickness ◽  
Vibration Isolation Performance ◽  
Isolation Performance

Mechanical properties of floor prototypes made for high-speed trains from composite multilayer floor structures of different materials and thicknesses were tested. Based on the test results, the equivalent mechanical parameters of different layers of the panels, core materials, etc., were calculated, and the multilayer mixed finite element model of the floor was built and verified. The multilayer mixed floor model was introduced into the car body of a high-speed train, and the test signals of the high-speed train were used as inputs to calculate the vibration response of composite floor structure. Vibration spectra of the high-speed train composite floor made of different materials and structures were compared and analyzed. The results show that the calculation of the floor vibration response of the vehicle car body within the framework of the equivalent model of the multilayer structure based on the mechanical performance test is an effective method to evaluate vibration characteristics. The vibration isolation performance of the stainless steel panel floor is better than that of the aluminum alloy panel, but its large mass is not favorable in lightweight body design. The vibration energy of birch core material floor is significantly smaller than the alder core material of the same size. The vibration isolation performance of the floor enhanced with the increase in the thickness of the outer metal panel, but when the outer metal panel thickness exceeds 0.8 mm, the influence becomes small. Therefore, the stainless steel-birch core composite floor with a large panel thickness has the best vibration isolation performance and can be used for the floor above the bogie and the suspended excitation source. Then, an optimal analysis considering mass and vibration characteristics was carried out, and the results show that there exists an optimal solution for the high-speed train. Regarding the overall design basis of the vehicle, the aluminum alloy panel lightweight structure can be used in combination with other general parts.

Study on the ZK60A and AZ31B Magnesium-Alloy in the Application on High-Speed Train Seats

2013 ◽  
Vol 690-693 ◽  
pp. 53-57 ◽  
Author(s):  
Lei Song ◽  
Yan Hui Zhao ◽  
Jia Zhen Liu ◽  
Jin Hui Mu ◽  
Xian Cai Guo
Keyword(s):  
Experimental Data ◽  
Weight Loss ◽  
Aluminum Alloy ◽  
Magnesium Alloy ◽  
High Speed ◽  
Fe Analysis ◽  
High Speed Train ◽  
Az31b Magnesium Alloy ◽  
Safety Control ◽  
High Speed Trains

The application of Magnesium alloy as a lightweight material in high-speed trains can realize an effect of largely reducing the weight of the trains. However, magnesium alloy extrusion profiles are rarely applied in the high-speed trains. A7003-T5 and 5052 aluminum alloys are used as the high-speed train seat-back’s material on high-speed trains recently. The experimental data indicates that the strength of the AZ31B magnesium alloy is 1.3 times of that of 5052 aluminum alloy and the strength of the ZK60A magnesium alloy is 1.21 times of that of A7003-T5 aluminum alloy.The FE analysis results indicate that if the ZK60A and AZ31B magnesium alloy is used as the material of the high-speed seat back instead of the A7003-T5 and 5052 aluminum alloy, it will have a weight loss of the backrest for approximately 33%. In addition, the application of ZK60A and AZ31B magnesium alloy has more advantages in energy-saving, environmental protection and safety control.

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