Simulation Analysis of Metal Flow in High-Speed Cold Roll-Beating

In order to achieve the metal flow law in high-speed cold roll-beating, the metal flow state was analyzed on the basis of the principle of high-speed cold roll-beating and the Law of Minimum Resistance. The finite element analysis model was established based on the processing of involute spline; high-speed cold rolling forming process was simulated. The equivalent strain and the flow track of a set of nodes on the contact surface on different time are analyzed, the flow law of each node is given, and simulation analysis result is compared with theoretical analysis result.

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Modal Analysis on Rotor of Asynchronous Traction Motor Used in High-Speed Trains

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.274.374 ◽

2013 ◽

Vol 274 ◽

pp. 374-377

Author(s):

Si Chen ◽

Fang Wang ◽

Jun Ci Cao

Keyword(s):

High Speed ◽

Simulation Analysis ◽

Analysis Model ◽

Element Analysis ◽

Traction Motor ◽

Simulation Research ◽

Operating Environments ◽

High Speed Trains ◽

Asynchronous Traction Motor ◽

Safety Operation

According to the suffered various impacts and vibrations of traction driving part in high-speed train under complex operating environments and conditions, the modal problems in the rotor of traction motor, power output device in traction transmission system, working in high-speed trains is investigated. In this paper, a Finite Element Analysis model for rotor modal simulation research is established, by using which the influences of structure parts on motor natural frequency is analyzed. From the simulation analysis, the natural frequencies, the vibration mode and the amplitude of each order modes are obtained, which could provide a theoretical basis for the rapid, stable and safety operation of high-speed trains.

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Analysis of Metal Flow Behavior and Residual Stress Formation of Complex Functional Profiles under High-Speed Cold Roll-Beating

Advances in Materials Science and Engineering ◽

10.1155/2018/9672768 ◽

2018 ◽

Vol 2018 ◽

pp. 1-10 ◽

Cited By ~ 1

Author(s):

Fengkui Cui ◽

Yongxiang Su ◽

Kege Xie ◽

Wang Xiaoqiang ◽

Xiaolin Ruan ◽

...

Keyword(s):

Residual Stress ◽

Plastic Flow ◽

High Speed ◽

Metal Flow ◽

Tooth Profile ◽

Stress Generation ◽

Functional Profile ◽

Forming Process ◽

Cold Roll ◽

Stress Formation

To obtain a good surface layer performance of the complex functional profile during the high-speed cold roll-beating forming process, this paper analyzed the metal plastic flow and residual stress-formed mechanism by using a theoretical model of the metal flow and residual stress generation. By using simulation software, the cold roll-beating forming process of a spline shaft was simulated and analyzed. The metal flow and residual stress formation law in the motion were researched. In a practical experiment, the changes in the grains in the spline tooth profile section and the residual stress distribution on the tooth profile were studied. A microcorrespondence relationship was established between the metal plastic flow and the residual stress generation. The conclusions indicate that the rate at which the metal flow decreases changes gradually at different metal layers. The residual stress value is directly related to the plastic flow difference. As the roll-beating speed increases, the uneven degree of plastic deformation at the workpiece surface increases, and the residual stress in the tooth profile is generally greater. At the same roll-beating speed, the rate change trend of the metal flow decreases gradually from the surface to the inner layer and from the dedendum to the addendum. The residual stress distribution on the surface of the tooth profile decreases from the dedendum to the addendum. These findings provide a basis and guidance for the controlled use of residual stress, obtaining better surface layer quality in the high-speed cold roll-beating process of the complex functional profile.

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Dynamic Analysis of DVG 850 High-Speed Machining Center

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.487.203 ◽

2012 ◽

Vol 487 ◽

pp. 203-207

Author(s):

Gong Xue Zhang ◽

Xiao Kai Shen

Keyword(s):

High Speed ◽

Simulation Analysis ◽

Response Analysis ◽

Improved Method ◽

Analysis Software ◽

Element Analysis ◽

Harmonic Response ◽

Machining Center ◽

Calculation Results ◽

Harmonic Response Analysis

Purpose, with the application of workbench finite element analysis software, get the analysis results of DVG 850 high-speed vertical machining center via the modal analysis and harmonic response analysis. Use the calculation results for reference, put forward the improved method, and prove the credibility of the simulation analysis by testing DVG 850 prototype.

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Study on the High-Speed Milling Performance of High-Volume Fraction SiCp/Al Composites

Materials ◽

10.3390/ma14154143 ◽

2021 ◽

Vol 14 (15) ◽

pp. 4143

Author(s):

Youzheng Cui ◽

Shenrou Gao ◽

Fengjuan Wang ◽

Qingming Hu ◽

Cheng Xu ◽

...

Keyword(s):

High Speed ◽

Large Scale ◽

Volume Fraction ◽

Simulation Analysis ◽

Cutting Temperature ◽

High Volume ◽

Cutting Parameters ◽

High Volume Fraction ◽

High Wear Resistance ◽

Element Analysis

Compared with other materials, high-volume fraction aluminum-based silicon carbide composites (hereinafter referred to as SiCp/Al) have many advantages, including high strength, small change in the expansion coefficient due to temperature, high wear resistance, high corrosion resistance, high fatigue resistance, low density, good dimensional stability, and thermal conductivity. SiCp/Al composites have been widely used in aerospace, ordnance, transportation service, precision instruments, and in many other fields. In this study, the ABAQUS/explicit large-scale finite element analysis platform was used to simulate the milling process of SiCp/Al composites. By changing the parameters of the tool angle, milling depth, and milling speed, the influence of these parameters on the cutting force, cutting temperature, cutting stress, and cutting chips was studied. Optimization of the parameters was based on the above change rules to obtain the best processing combination of parameters. Then, the causes of surface machining defects, such as deep pits, shallow pits, and bulges, were simulated and discussed. Finally, the best cutting parameters obtained through simulation analysis was the tool rake angle γ0 = 5°, tool clearance angle α0 = 5°, corner radius r = 0.4 mm, milling depth ap = 50 mm, and milling speed vc= 300 m/min. The optimal combination of milling parameters provides a theoretical basis for subsequent cutting.

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Construction Monitoring on Steel Truss Bridge’s Maintenance and Reinforcement

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.878.89 ◽

2018 ◽

Vol 878 ◽

pp. 89-94 ◽

Cited By ~ 1

Author(s):

Er Lei Wang

Keyword(s):

Simulation Analysis ◽

Analysis Model ◽

Element Analysis ◽

Construction Monitoring ◽

Finite Element Analysis Model ◽

Bridge Steel ◽

Steel Truss ◽

Stress And Deformation ◽

Site Test

Implementing monitoring over construction process of old bridge’s reinforcement serves as an important measure to ensure construction quality and safety and realize the goal of reinforcement. This paper, with a case study of the maintenance and reinforcement project of Zhicheng Yangtze River Bridge (steel truss highway-railway combined bridge), adopted MIDAS to establish finite element analysis model, and with stress and deformation as monitoring parameters, completed the construction monitoring work, numerical simulation analysis and site test for the reinforcement project.

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DEM Analysis of Lateral Ballast Resistance of Sleeper during Dynamic Stability Process under Different Vibration Frequency

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.988.315 ◽

2014 ◽

Vol 988 ◽

pp. 315-318

Author(s):

Bo Yan ◽

Bin Hu ◽

Ya Yu Huang ◽

Tao Yong Zhou

Keyword(s):

Dynamic Stability ◽

Vibration Frequency ◽

Simulation Analysis ◽

Dynamic Parameter ◽

Discrete Element ◽

Field Trials ◽

Analysis Model ◽

Railway Ballast ◽

Element Analysis ◽

Ballast Resistance

Railway ballast dynamic stability operations is an important work in the line maintenance and repair operations, the selection of dynamic parameter is usually dependent on field trials and practical experience, for lack of theoretical basis. This paper creates discrete element analysis model of railway ballast using the discrete element method, the numerical simulations are carried out to study the lateral ballast resistance during dynamic stability process. We focus on the influence of vibration frequency during dynamic stability process; an optimal vibration frequency of the simulation analysis is obtained and compared with the recommended vibration frequency of a product of a China Railway Large Maintenance Machinery Company, it is found that the two vibration frequencies are basically consistent. This result verifies the correct validity of the discrete element analysis model of railway ballast during dynamic stability process.

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Numerical Simulation of Galloping for Iced Quad-Bundled Conductor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1025-1026.955 ◽

2014 ◽

Vol 1025-1026 ◽

pp. 955-958 ◽

Cited By ~ 1

Author(s):

Jun Jie Shi ◽

Ya Nan Li ◽

Li Qin

Keyword(s):

Numerical Simulation ◽

Finite Element ◽

Simulation Analysis ◽

Time Integration ◽

Vertical Vibration ◽

Analysis Model ◽

Element Analysis ◽

Beam Elements ◽

Time Integration Method ◽

Wake Interference

The theoretical study of galloping can effectively promote anti-galloping techniques. Cable element is utilized to imitate the bundled conductor, and beam elements are used to simulated the spacers, established galloping finite element analysis model which can consider sub-conductors wake interference. The finite element equation was solved by time integration method and the calculation program was compiled by MATLAB. Through numerical simulation analysis, compared the dancing in the case of considering the effect of the sub-conductor wake and ignoring the effect of the sub-conductor wake. The results showed that considering the effect of the wake on aerodynamic loads has a greater vertical vibration amplitude. This method can provide reference for the study of prevention technology on dancing.

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Thermal Characteristics Finite Element Analysis and Temperature Rise Experiment for High Speed Motorized Spindle

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.52-54.1206 ◽

2011 ◽

Vol 52-54 ◽

pp. 1206-1211 ◽

Cited By ~ 1

Author(s):

Huai Xing Wen ◽

Mei Yan Wang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Machine Tool ◽

Temperature Rise ◽

High Speed ◽

Thermal Characteristics ◽

Analysis Model ◽

Ansys Software ◽

Motorized Spindle ◽

Element Analysis

The thermal characteristics of the motorized spindle determines maching qualities and cutting capabilities, and is one of the important factors influencing the precision of the high speed NC machine tool. To improve the performance of the high speed machine tool, it is important to study the thermal characteristics of the motorized spindle. It had been studied in two ways: one is finite element analysis by Ansys software, in which the finite element analysis model was built. According to the actual working condition, the heat source and the heat transfer coefficient of every part are calculated. On this basis, the temperature field and temperature rises were gotten in Ansys software. The other way is temperature rises experiment on the motorized spindle test platform. The result was shown in the form of curve. These two ways shown the same result: the highest temperature rise appears in the area of electromotor, then followed by the rolling bearing .The result provides the necessary theory basis for optimizing the structure of the motorized spindle and establishes a basis for the research and application about the high speed spindle.

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Numerical Simulation Analysis in Cooling Temperature Field and Bending Deformation after Rolling of 100-Meter Rail

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.121-126.4523 ◽

2011 ◽

Vol 121-126 ◽

pp. 4523-4527

Author(s):

Yu Yan Liu ◽

Yan Wang ◽

Lin Chen ◽

Ge Li ◽

Jian Guo Wang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Large Scale ◽

Simulation Analysis ◽

Analysis Model ◽

Cooling Process ◽

Element Analysis ◽

Stress Variation ◽

Finite Element Analysis Model ◽

Bending Deformation

The paper established U75V 100-meter rail 3-D transient non-liner finite element analysis model about U75V 100-meter rail by using the large-scale non-liner finite element analysis software ABAQUS. By analyzing the different positions in the section of the temperature variation, the changes of bending degree and the residual stress variation after the bending deformation have changed. Based on the 100-meter straight rail in natural cooling under the cooling process, simulation results showed that in the cooling process, deflection change with time mainly divided into four stages; In consideration of the friction effect, the flat rail cold curve for its deformation among roughly flat, the curve about either ends, the scope for bending is 18 meters, the maximal displacement is 1.88 meters while the flat rail occured end colding.

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