bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thermal Impact Analysis of Brake Discs Under Extreme Working Conditions of Trackless Trains Based on Virtual Testing
Authors: Li Huaming , Xia Mingchen , Zheng Shize , Ding Jingxian 
Published: January 2025

Abstract
Trackless trains adopt public right-of-way. The braking distance requirements are strict, and large deceleration is required to stop the train. Brake disc is an important part of the trackless train, its service performance directly affects the braking safety of the train, and the temperature and stress are the key performance parameters. In order to investigate the influence law of variable working conditions on the temperature and stress of the brake disc, for the problem that it is difficult to simulate the extreme working conditions based on the real measurement method, the brake disc of a 3-vehicle and 6-axle trackless train is taken as the research object. According to the structural dimensions and material parameters, a thermo-mechanical coupling simulation model of the brake disc is established based on the theories of transient thermodynamics and heat transfer. Based on the standard comparison analysis, the deceleration index of the trackless train to meet the requirements of braking distance is designed, and the virtual test of the temperature and stress field of the brake disc is carried out under the conditions of different loads, deceleration, and ramp gradient. The results show that it is feasible to simulate the extreme working conditions based on the virtual test, and the maximum temperature and stress of the brake disc increase with the increase of load, deceleration and ramp gradient. Under the extreme working conditions, the maximum temperature of the brake disc is about 680.4 ℃, and the maximum stress is about 1240 MPa. The research results provide a reference for the safe operation and maintenance of the trackless train.
Experimental Study of the Effect of Temperature on the Resistance of SOFC Stainless Steel Bipolar Plate
Authors: Wei Renshan , Cui Huanyong , Zhang Yican , Xu Jing , Zeng Wensheng , Li Fajia , Liu Haining 
Published: January 2025

Abstract
Stainless steel bipolar plates play a key role in solid oxide fuel cells as a supporting part of solid oxide fuel cells. In order to obtain the variation of the resistance of nickel–cobalt-coated stainless steel bipolar plates with temperature, a measurement test platform for the resistance of high-temperature bipolar plates was built, and the resistance of the bipolar plates with temperature was measured by the four-terminal resistance measurement method, and the resistance values of the solid oxide fuel cell bipolar plates at different temperatures were measured. The results show that the resistance of the stainless steel bipolar plate specimen of solid oxide fuel cell gradually decreases during the temperature increase. When the temperature of the solid oxide fuel cell stainless steel bipolar plate specimen is increased to 800 °C, the resistance value is 0.6 Ω and the resistivity is 0.24 Ω m.
Structure Design of a Corner Protection Injection Mold
Authors: Li Zhanfeng , Chen Guangjuan 
Published: January 2025

Abstract
Aiming at the process characteristics of a high-end home decoration—corner protectors, while satisfying the functional requirements, and considering the optimization of the product appearance design. A reasonable injection mold structure design scheme is selected. The design process of the injection mold, special side core-pulling design points of double-side sliders, injection forming process and feeding mode, etc. are analyzed. Finally, after processing and assembling each component, a second trial mold production is carried out, and the qualified plastic parts are successfully produced. The surface quality of the plastic parts is good and the mechanical properties are higher.
Design and Realization of Defrost and Icebreaking Device for Cryogenic Connector of a Certain Rocket
Authors: Tong Fei , He Huan , Song Tao , Zhang Li , Lin Yiyong 
Published: January 2025

Abstract
In this paper, aiming at the shortcomings of the current defrosting and icebreaking device of a certain type of rocket cryogenic connector, a new type of rocket cryogenic connector defrost and icebreaker is designed by analyzing the frost generation mechanism on the surface of the low-temperature connector and the influence of ice on the connector shedding and secondary docking, The installation location, structural shape and size specifications of the new device were designed through the analysis of the key defrosting and icebreaking parts on the cryogenic connector. According to the requirements of defrosting and icebreaking of low-temperature connectors during the filling process and temperature return before secondary docking, the air supply flow, gas supply pressure and temperature indicators were set after experimental data and simulation model calculation. Experimental verification shows that the new defrosting and icebreaking device can improve the reliability of low-temperature connector falling off and ensure the safety and effectiveness of secondary docking.
Crashworthiness Design of the Lower Support of the Cargo Compartment of Civil Aircrafts
Authors: Chen Chen 
Published: January 2025

Abstract
The lower part of the cargo floor support is the key part of the aircraft that absorbs energy after contacting with the ground firstly in the process of crash, which is an important index of the crashworthiness of the aircraft. In this paper, based on the transient dynamics explicit integration algorithm and finite element analysis method, finite element analysis is carried out to analyse the nonlinear process of the structural deformation of the support member in the crash. The results show that the peak acceleration at the centre of the floor can be reduced by reducing the thickness of the strut to improve its crashworthiness. The width of the edge strip of the brace and the angle of the outer support of the brace have little effect on the deformation of the bottom of the fuselage and the peak acceleration at the centre of the floor.
Structural Design and Feasibility Analysis of a Double-Rotor Wheeled Wall-Climbing Robot
Authors: Peng Fangfang , Yu Baojun , Guo Yongyi , Jiang Hancheng 
Published: January 2025

Abstract
In this paper, a double-rotor wheeled wall climbing robot is designed and a new transition method is proposed. The wall-climbing robot is using the counter-thrust force generated when the rotor rotates at high speed as the adsorption force, so that the robot can adsorb stably on the wall without slipping and tilting and can realize the transition from the ground to the vertical wall. The forces of the robot in different motion states were analyzed, and the overall structure of the robot was verified to meet the strength requirements by setting appropriate loads through finite element simulation. By numerical simulation of the aerodynamic characteristics of a single rotor when rotating, the pressure on the upper and lower surfaces of the rotor and the surrounding velocity vector, and the feasibility that the robot can be stably adsorbed to a vertical wall is verified.
Design of Rectangular Part Layout Optimization System Based on Standard Dimension
Authors: Ji Jun , Huang Dun-Hua , Xing Fei-Fei , Chen Xin 
Published: January 2025

Abstract
In many industries of the national economy, the problem of material optimization layout will be encountered. In this paper, the layout problem of two-dimensional guillotine-cutting stock is studied, and the related concepts of the same-shape block and the same-shape section are proposed. To improve the efficiency of layout, the standard dimension of same-shape block and the standard dimension of same-shape section are proposed. By applying the standard dimension, the calculation speed and the efficiency of the algorithm will be improved effectively.
Design of Technological Process and Control System for Multi Station Stacking Equipment
Authors: Deng Cheng-Gang , Zhou Shu-Yu 
Published: January 2025

Abstract
In order to realize the automation of the stacking production line in the spinning workshop, a translational multi station stacking process was designed, the moving path of the gripper of the stacking equipment was optimized, and the overlapping stroke action was set to improve the stacking efficiency. The design scheme of multi position stacking equipment control system is put forward, and the automatic stacking process of cheese under four-axis linkage is realized by using the principle of three-dimensional positioning and equipped with servo system. The average time of single stacking is less than 54 s, which meets the efficiency requirements of the production line, and provides a practical reference for the automation and intelligence of the spinning workshop.
Optimized Design of Guide Vanes for Vertical Upwelling in Marine Ranching: A Three-Dimensional Numerical Analysis
Authors: Chen Nan , Li Dongfeng , Rong Qinhuan , Mo Kui , Wu Yaer , Zhang Heshun , Bai Fuqing , Hu Jianyong , Wei Ziyang , Lin Feiyu 
Published: January 2025

Abstract
Marine ranching holds significant potential for improving the marine ecological environment. The artificial upwelling technology and devices employed within it contribute to enhancing the marine carbon sink, strengthening the aquatic biological pump, and promoting fisheries resource proliferation. Therefore, this study focuses on the guide vanes of artificial upwelling devices, investigating the role of optimized guide vanes in vertical upwelling efficiency. Through three-dimensional numerical simulations, the performance of these optimized guide vanes is analyzed to provide insights for practical applications.
Design of Ceramic Conical Cover Assembly Equipment
Authors: Lu Zhuowen , Wu Changzhong , Chu Daying , Hou Zhihao 
Published: January 2025

Abstract
Ceramic cone is an important part of the aircraft, and its component installation accuracy is very important. In view of the low degree of automation in this field, this paper proposes a new type of ceramic cone bonding assembly equipment to replace manual bonding assembly of ceramic cone and Invar connecting ring. The overall structure and function of the equipment and the assembly process were introduced with the help of Solidworks 3D drawing software. The cone-housing positioning of self-centering chuck + servo adjusting seat and the non-contact measurement scheme of multi-station and multi-section can be measured were adopted. The reasonableness of the assembly effect was verified by the production of a prototype.
Structure Design and Simulation Analysis of a Load Acquisition Encoder
Authors: Shang Shijie , Li Guofu , Li Haitao , Chen Wenbo 
Published: January 2025

Abstract
In response to the problems of large volume and poor reliability of traditional acquisition encoder, the author designs a load acquisition encoder. Combined with the simulation method, the internal and external structure of the acquisition encoder is deeply analyzed from two dimensions of mechanics and heat. It ensures the integrity and reliability of the functional performance when the volume is reduced, and further verifies the rationality of the structural design of the equipment, good vibration resistance and heat dissipation performance. It can meet the practical engineering needs, and has certain reference significance for the same type of product design.
Design of Automatic Feed Packaging Machine with Robotic Arm
Authors: Peng Peiming , Zheng Weilin , Tan Xiaolan , Tang Lianyao , Wang Yage 
Published: January 2025

Abstract
According to the current market demand, the operation mode of manual packaging products is inefficient. In order to improve production efficiency and reduce the labor and time cost of packaging operations, this paper designs a product packaging machine that can be used for pellet feed. Feeding is realized through the feeding mechanism of the packaging machine. The feed is automatically packed by the bag feeding mechanism and sealing device, and finally the product is sent to the designated place through belt transmission, and an ABB robot is used for handling and palletizing. The whole machine can achieve continuous work, so that the packaging process can run automatically and efficiently, reduce production costs, and bring higher benefits to actual production.
Design and Implementation of Intelligent Coupled Rearview Mirror Variable Position Structure
Authors: Liu Jinghui , Xu Tongqiang , Du Guangfu , Wu Liying 
Published: January 2025

Abstract
In view of the shortcomings of the traditional optical rearview mirror, such as the existence of blind zone, rain weather, snow weather and night vision observation are not effective and the wind resistance coefficient of automobile at high speed is large, which affects fuel economy and other problems. Because the reliability of electronic rearview mirrors is lower than that of traditional rearview mirrors. Therefore, a coupled variable position intelligent rearview mirror is designed. It has both the structure of traditional optical rearview mirror and the image processing ability of electronic rearview mirror. Under the condition of satisfying the driver's visual habits, it can effectively improve the visual effects of different scenes, and improve the reliability and driving safety of the car. By designing the displacement mechanism, the information display mechanism can be folded into the cab. It can effectively reduce the air resistance and wind noise when the car is driving at high speed. It can improve the fuel economy and NVH performance of automobiles. By using SolidWorks to carry out three-dimensional design and motion simulation, it is proved that there is no interference in the motion process of the displacement mechanism. It can realize automatic displacement according to different situations, and it has human-computer interaction ability and a higher degree of intelligence.
Modelling the Thermal Characteristics of a Machine Tool with External Mechanical Spindle Motor
Authors: Shi Kai , Yang Rui , Gao Weiguo , Zheng Yingjie , Hu Gaofeng , Weng Lingtao , Fu Yutao , Wang Pengkai 
Published: January 2025

Abstract
For machine tools with external mechanical spindle motor, there is a significant problem: when the traditional finite element (FE) model is used for thermal characteristic analysis, the test and the simulation results are significantly different. This leads to low reliability in the forward design and thermal balance design of machine tools by the traditional FE model. Therefore, this paper proposes the thermal characteristic analysis (TCA) model that allows various heat transfer modes and heat generation of the feed system in the enabling state. Then, the FE analysis results are compared and analyzed by constructing the thermal characteristic testbed. The results show that the temperature and deformation fields obtained by the two methods are generally consistent, which proves that the constructed TCA model can quickly and accurately obtain the thermal performance of the machine tool with external mechanical spindle.
A Method for Reconstructing Three-Dimensional Structure of Nasal Cavity Based on a Short-Source Acoustic Tube
Authors: Lian Xiaoqin , Wang Yuqiao , Gao Chao , Li Jin , Ma Guochun , Wang Zitong , Bao Kexin 
Published: January 2025

Abstract
The reconstruction of the three-dimensional structure of the nasal cavity is significant for the diagnosis and treatment of nasal and nasopharynx diseases. This study proposes a method for reconstructing the three-dimensional structure of the nasal cavity based on the short-source acoustic tube, which addresses the inconvenient portability and high cost of the long-source acoustic tube. Firstly, we separate incident and reflected waves based on the propagation characteristics of pulsed acoustic waves in a short-source acoustic tube. Secondly, to reduce the error in calculating the input impulse response sequence, the methods of correcting the direct current (DC) offset component and suppressing the high-frequency noise are used to pre-process the nasal acoustic signals. Finally, we adopt the layered reconstruction method of the three-dimensional structure of the nasal cavity to reconstruct the depth cross-sectional area two-dimensional curve and take a three-dimensional visualization. Through comparative analysis, this method can meet practical application requirements.
Analysis of the Influence of Preload Loading Deviation of Pitch Bearing Bolt Group on the Contact Stress of Rolling Elements
Authors: Ouyang Weijin , Zhao Bing , Qiao Yueqi , Li Heng , Deng Dingshan , Zhang Shen 
Published: January 2025

Abstract
This paper aims to study the influence of bolt preload distribution on structural performance in the bolted connection structure model of pitch bearings of wind turbines. The preload application deviation and the change of contact stress of the rolling element of the pitch bearing were analyzed by finite element modeling. The results show that the bolt preload loading deviation will cause the rolling element contact stress of the pitch bearing to fluctuate, and the rolling element contact stress near the blade is greater than the rolling element contact stress far away from the blade. In the case of large fluctuations in preload, the contact stress fluctuations of the lower rolling elements are more affected. Therefore, in order to extend the working life of pitch bearings, the bolt preload should be precisely controlled during assembly.
Modal Analysis of Mobile Platform of Tea Garden Management Machine in Hilly and Mountainous Areas
Authors: Zhang Yanzun , Xiao Jiacheng , Yin Yuxing 
Published: January 2025

Abstract
In order to verify the rationality of vibration design of mobile platform, a modal analysis method based on ANSYS is designed. Firstly, the natural frequency of the mobile platform is simulated and analyzed according to the three-dimensional digital model. Then, the external excitation value of the mobile platform is obtained by theoretical calculation method. Through analysis, it can be seen that the mobile platform does not generate resonance under normal working conditions, so the design of the mobile platform meets the vibration requirements.
Optimization of Structural Parameters of Vortex Type Coiled Tubing Drag Reduction Tool Based on Coanda Effect
Authors: Xue Xianbo , Hua Zejun , Liu Haijun , Zhang Chengcheng , Qu Yue , Zhu Xiaohua , Shi Changshuai , Cheng Feilong , Luo Dongjing 
Published: January 2025

Abstract
The vortex drag reduction tool based on wall attachment effect has a simple structure and high reliability, but lacks systematic research on tool structural parameters. In the application of coiled tubing drilling, there are problems such as poor parameter matching and weak power output. Therefore, based on the theory of wall attached jet, this article establishes a numerical model of vortex drag reduction tools, and investigates the effects of wedge distance, sidewall angle, wedge angle, and flow channel width on the oscillation performance of the tools. The research results indicate that the wedge distance and the angle between the sidewalls affect the oscillation frequency generated by the tool by affecting the jet deflection angle, the wedge angle affects the fluid flow velocity and vortex strength in the vortex chamber, and the flow passage affects the switching of the attached wall jet by affecting the pressure on both sides of the jet port. When the splitting distance is greater than 40 mm, the angle between the sidewalls is 30°, the width of the flow passage is 4–5 mm, and the angle between the splitting tips is 15°, the oscillation performance generated by the tool is better. The research results have certain guiding significance for the reasonable matching and optimization design of the structural parameters of eddy current drag reduction tools.
Analysis of the Launch Dynamics of All-Terrain Rocket Artillery Under Ice Conditions
Authors: Li Fan , Yu Cungui 
Published: January 2025

Abstract
In order to study the launch performance of rocket artillery in alpine areas, a multi-body dynamic model of all-terrain rocket artillery was established, the interaction model between ice surface and ice surface was established by using the finite element method, the interaction force between orbit and ice surface was obtained, and the launch performance of all-terrain rocket under the ice surface was calculated by using the multi-body dynamics model. The results show that the modeling method can well simulate the interaction between the track and the ice surface, and the all-terrain rocket launcher has good launch performance on the ice surface.
Numerical Analysis Model of Contact Stress in the Raceway of Double Row Tapered Roller Bearing Under Overturning Torque in Wind Turbine
Authors: Li Chang , Wu Wensong , Du Jing , Wang Shuang , Jiang Shuxin , Sun Weiwei 
Published: January 2025

Abstract
This article extends the force analysis of the single rolling element in the whole double row tapered roller bearing to the establishment of a global static equilibrium equation. And further analyzes the position relationship between the roller and the raceway after deflection under overturning torque. Based on non-Hertz line contact theory and bearing force balance equation, a numerical analysis model for the contact stress of the raceway in a double row tapered roller bearing is proposed; To verify this model, a local finite element model of bearing contact was established based on ANSYS to obtain the stress distribution of the raceway. The results show that the stress calculation model for wind turbine spindle double row tapered roller bearings under overturning torque proposed in this paper has good simulation accuracy.
Microstructure of AZ31B Alloy Induced by Laser Shock
Authors: Li Xiangyu , Ma Baoji , Liu Bin , Cao Jinkui , Li Liangliang 
Published: January 2025

Abstract
Magnesium alloys have great potential in the field of biomedical degradable materials. However, their poor mechanical and corrosion resistance properties limit their applications. In this study, the AZ31B alloy with a compact hexagonal close-packed (HCP) crystal structure was selected as the material, as it tends to undergo twinning deformation rather than dislocation slip during plastic deformation due to its low stacking fault energy. The microstructures before and after LSP treatment were characterized using optical microscopy (OM), electron backscatter diffraction (EBSD), and X-ray diffraction (XRD). The results showed that the grain size was refined and exhibited a gradient distribution after LSP treatment. Electron backscatter diffraction (EBSD) was used to characterize the microstructure of LSP before and after treatment. The results showed that the grain size was refined after LSP treatment, and showed a gradient distribution trend.
Analysis of Factors Influencing the Tension Change of Electrode Wire in High Speed Wire Cutting
Authors: Ge Suxia , Wang Lili 
Published: January 2025

Abstract
The electrode wire for EDM wire cutting is not a rigid body, which is affected by external forces during processing, resulting in fluctuations in the tension value of the electrode wire, which causes the electrode wire to break, thus resulting in the reduction of machining accuracy. In order to improve the machining accuracy of the parts, the factors affecting the change of electrode wire tension are analyzed, the main influencing factors are derived, and the necessary measures are taken to make the corresponding adjustments to reduce the adverse effects of the fluctuation of tension value.