Advances in Mechanical Engineering最新文献_第6页

Numerical and experimental study of two-vehicle overtaking process 双车超车过程的数值和实验研究

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231221044

Dong Do Van, Ching-Chen Chou, Keh-Chin Chang

{"title":"Numerical and experimental study of two-vehicle overtaking process","authors":"Dong Do Van, Ching-Chen Chou, Keh-Chin Chang","doi":"10.1177/16878132231221044","DOIUrl":"https://doi.org/10.1177/16878132231221044","url":null,"abstract":"The overtaking process between two simplified Ahmed body models is studied using a set of static experiments to provide a comparison basis for the numerical study. Both steady-state (static) and transient (dynamic) simulations are performed. There are notable differences of the drag and side force coefficients between the predicted and experimental results in the wake effects on the overtaking model as well as under a situation when two models are parallel for the static tests. These differences are attributed to the SST [Formula: see text] model, which is a two-equation Reynolds-averaged Navier-Stokes equation (RANS) turbulence model with an assumption of isotropic eddy viscosity, employed in the simulation. A more advanced turbulence model that simulates large-eddy organized motion in a turbulent flow and which uses an anisotropic eddy viscosity formulation in the near-wall flow subregion would increase the prediction accuracy for the overtaking simulation. A comparison of the results for the steady-state and the transient simulations at various relative velocity ratios ([Formula: see text]) shows that the quasi-steady approach is suited to simulate the dynamic two-vehicle overtaking process when the condition [Formula: see text] is met.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"29 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139192387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objective parameter optimization strategy based on engine coordinated control for improving shifting quality 基于发动机协调控制的多目标参数优化策略改善换挡质量

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231217809

Xianhe Shang, Fujun Zhang, Jian Wang, Xu Wang, Liguo Wei

引用次数: 0

Structure failure analysis on metro axle-box hanger due to modal resonance with rail corrugation 轨道波纹模态共振导致的地铁轴箱吊架结构失效分析

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231219553

Wenbiao Huo, Pingbo Wu, Qunsheng Wang, Lai Wei, Kang Wang, Shidong Wu

{"title":"Structure failure analysis on metro axle-box hanger due to modal resonance with rail corrugation","authors":"Wenbiao Huo, Pingbo Wu, Qunsheng Wang, Lai Wei, Kang Wang, Shidong Wu","doi":"10.1177/16878132231219553","DOIUrl":"https://doi.org/10.1177/16878132231219553","url":null,"abstract":"During the long-term service of a metro vehicle, different kinds of fracture failure occur on the bogie, with the axle-box hanger being a representative one. To investigate the cause of the hanger structure failure, a study was conducted that combined field investigation with finite element analysis, focusing on the modal resonance behavior between the hanger and the rail corrugation. Based on the findings, a structural optimization of the hanger was proposed and an experimental verification was conducted. The results show that the main reason for the hanger fracture failure is that the resonance phenomenon that occurred in the hanger structural modal frequency when exposed to the rail corrugation, leading to the poor lateral vibration environment of the hanger and the fracture failure in the long-term service operation. The first-order structural modal frequency of the hanger is 432 Hz, which is very close to the wheel/rail excitation frequency of 435 Hz caused by the rail corrugation. The modal frequency of three newly designed hangers can prevent the frequency caused by the rail corrugation. Experimental verification of the new hangers showed a 55.49% lower maximum average acceleration of hanger lateral vibration compared to the original structure, confirming the effectiveness of the redesigned hangers.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"30 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding 选择铝/铜管磁脉冲焊接工作线圈的设计参数

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231219573

Jiyeon Shim, Ill-Soo Kim

{"title":"Selection of design parameters of working coil for Al/Cu tubular Magnetic Pulse Welding","authors":"Jiyeon Shim, Ill-Soo Kim","doi":"10.1177/16878132231219573","DOIUrl":"https://doi.org/10.1177/16878132231219573","url":null,"abstract":"MPW produces a high Lorentz force for welding through the interaction of magnetic fields between the working coil and outer workpiece. Therefore, the design of the working coil is crucial in the MPW process. In particular, it is important to understand and estimate the distribution of Lorentz force on the outer tube and the stress on the working coil. These factors greatly impact the efficiency of energy delivery and the durability of the process. The purpose of this research was to analyze the effect of coil design parameters on the Lorentz force and stress. The ultimate objective was to optimize these design parameters specifically for welding tubular workpieces; for this, an electromagnetic-mechanical FE-model was developed. The design parameters considered in this study included the angle, radius, and protruding length. The Lorentz force and stress were calculated based on these parameters. Notably, the response surface method (RSM) and sequential quadratic programing (SQP) were utilized to develop a prediction model and optimize the design parameters, respectively. The findings revealed that the protruding length and angle are significant design parameters. Consequently, a working coil was manufactured using the optimized design parameters, leading to a successful Al/Cu joint. These results emphasize the indispensability of optimizing design parameters to achieve high-quality joints.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"13 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139189159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of 3D printed pressure-reducing insoles based on changes in parameters of lattice structure 根据晶格结构参数变化设计 3D 打印减压鞋垫

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231216609

Lu-Ping Kang, Tai-Sheng Gong

引用次数: 0

Structural optimization design of BIW using NSGA-III and entropy weighted TOPSIS methods 使用 NSGA-III 和熵加权 TOPSIS 方法优化生物质能源结构设计

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231220351

Hao Chen, Chihua Lu, Lie Feng, Zhien Liu, Yi Sun, Wan Chen

{"title":"Structural optimization design of BIW using NSGA-III and entropy weighted TOPSIS methods","authors":"Hao Chen, Chihua Lu, Lie Feng, Zhien Liu, Yi Sun, Wan Chen","doi":"10.1177/16878132231220351","DOIUrl":"https://doi.org/10.1177/16878132231220351","url":null,"abstract":"Multi-objective optimization is always a difficult and hot problem for the static and dynamic performance and lightweight optimization design of a body-in-white (BIW). In this regard, a hybrid method coupled with NSGA-III and entropy weighted TOPSIS methods was put forward here. Effects of each design variable on the BIW performance was studied by means of the contribution method so as to optimize various design variables. Further, an experimental design was carried out by means of a radial basis function model to approximate each performance index of the automotive body. On the base of that, a comprehensive method where the Pareto frontier is searched by means of NSGA-III while the optimal solution is selected by means of the entropy weighted TOPSIS method was proposed based on lightweight, static and dynamic performances to analyze BIW performances to determine the contradictory optimal solution among various BIW factors. Afterward, our numerical verifications demonstrate that the BIW performances are improved significantly so that it can be feasible to optimize static and dynamic BIW performances and the lightweight performance of the BIW can be guaranteed accordingly.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"128 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RSF-based model for predicting pump failure trends in tunnels 基于 RSF 的隧道泵故障趋势预测模型

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231215184

Xin Wu, Qianru Chen, Min Hu, Lining Gan, Li Teng

{"title":"RSF-based model for predicting pump failure trends in tunnels","authors":"Xin Wu, Qianru Chen, Min Hu, Lining Gan, Li Teng","doi":"10.1177/16878132231215184","DOIUrl":"https://doi.org/10.1177/16878132231215184","url":null,"abstract":"The water pump is a piece of crucial electromechanical equipment to ensure the safety of tunnels. Therefore, it’s essential to master the performance trend of pumps to prevent the occurrence of failure. In this paper, essential information and failure records of pumps in 15 operating tunnels for many years were collected. According to the data characteristics, a data-filling model based on XGBoost is developed to address the issue of the censored data. Considering that most pumps are still in operation, a failure prediction model based on Random Survival Forest (RSF) is designed by incorporating survival analysis principles. The proposed Pump Failure Trend Prediction Model (PFTPM) overcomes difficulties caused by the lack of previous data and the small number of old pumps. We identify two phases of failure: the first phase exhibits a bathtub-shaped failure rate curve, while the second phase is characterized by a lower failure risk. The importance of considering rainfall, pump operating time, and performance changes for effective maintenance planning is emphasized. Furthermore, we summarize the failure evolution law of various types of pumps to amend maintenance cycle in the existing specification. Overall, this paper integrates innovative big-data technologies into the traditional maintenance data of tunnel pumps.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"325 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139188189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on multi-objective flow shop scheduling optimization in supply chain environment based on Fuzzy Relevance Entropy Method 基于模糊相关性熵法的供应链环境下多目标流水车间调度优化研究

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231218517

Zhe Luo, Yonghong Tan, Guangyu Zhu, Yuping Xia, Xinyu Wang

{"title":"Research on multi-objective flow shop scheduling optimization in supply chain environment based on Fuzzy Relevance Entropy Method","authors":"Zhe Luo, Yonghong Tan, Guangyu Zhu, Yuping Xia, Xinyu Wang","doi":"10.1177/16878132231218517","DOIUrl":"https://doi.org/10.1177/16878132231218517","url":null,"abstract":"For the multi-objective flow shop scheduling problem in the supply chain environment, this paper proposes the Fuzzy Relevance Entropy method (FREM) to solve the adaptive value assignment problem in the multi-objective optimization process of the supply chain environment by combining Fuzzy Information Entropy Theory (FIET) and Degree of Membership Function (DMF). Firstly, the uncertainty of each sub-objective of the ideal solution and Pareto solution of the objective is extracted using the Degree of Membership Function. Secondly, each solution is mapped into an affiliation degree fuzzy set and the information contained in the fuzzy set is reprocessed using Fuzzy Information Entropy Theory. Finally, the amount of information contained in the ideal solution solved by the Pareto method is used to guide the evolution of the Particle Swarm Optimization (PSO) algorithm, thus avoiding the traditional multi-objective optimization process of assigning weights to solve the fitness link. This paper combines both the Fuzzy Relevance Entropy method and the Stochastic Weight method with Particle Swarm Optimization (PSO) and Differential Evolution (DE) algorithms to address the five-objective flow shop scheduling problem in the supply chain environment. Experimental results demonstrate that the proposed Fuzzy Relevance Entropy method effectively solves the multi-objective flow shop scheduling problem in the supply chain environment and achieves better optimization results compared to the Stochastic Weight method.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139187698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Suspension parameters for low-damped carbody oscillation of high-speed railway vehicle 高速铁路车辆低阻尼车体振荡的悬挂参数

Advances in Mechanical Engineering Pub Date : 2023-12-01 DOI: 10.1177/16878132231219574

Joonhyuk Park

{"title":"Suspension parameters for low-damped carbody oscillation of high-speed railway vehicle","authors":"Joonhyuk Park","doi":"10.1177/16878132231219574","DOIUrl":"https://doi.org/10.1177/16878132231219574","url":null,"abstract":"This study presents an optimization method to design the suspension properties associated with low-damped carbody oscillations for high-speed railway vehicles. In this method, the least damping ratio for the low-frequency modes in the entire service speed range and the critical speed for a worn wheel are proposed for the design objectives. Based on the linearized vehicle model, a genetic algorithm is applied to determine the optimal suspension properties to maximize the least damping ratio while maintaining the critical speed above the desired speed. The optimization results show that the proposed method can enhance lateral ride comfort by eliminating the region where the least damping ratio of the carbody mode decreases excessively and securing a constant for the entire service speed range. The least damping ratio was improved from approximately 5.7% to 15.6% and the critical for the worn wheel increased from approximately 430 to 499 km/h. Parametric studies are conducted to investigate the influence of the tolerances of the suspension properties, and the results provide useful information regarding the manufacture of suspension elements and assembly of the bogie system. The validity of the optimized suspension properties is verified from the simulation results using railway vehicle dynamics software.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139190280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of influencing factors on numerical simulation of transverse jet in supersonic flow 超音速流中横向射流数值模拟的影响因素分析

Advances in Mechanical Engineering Pub Date : 2023-11-01 DOI: 10.1177/16878132231214949

Jiang-Fei Yu, Tao Tang, Jin-cheng Zhang, Da-Peng Xiong, Hong-Bo Wang, Ming-Bo Sun

{"title":"Analysis of influencing factors on numerical simulation of transverse jet in supersonic flow","authors":"Jiang-Fei Yu, Tao Tang, Jin-cheng Zhang, Da-Peng Xiong, Hong-Bo Wang, Ming-Bo Sun","doi":"10.1177/16878132231214949","DOIUrl":"https://doi.org/10.1177/16878132231214949","url":null,"abstract":"Numerical simulation is becoming an important research method in the field of supersonic flow. Its accuracy and reliability have always been the key to its further application and the focus of current researches. In this study, a series of numerical simulations of transverse supersonic jet in supersonic free flow are carried out based on Reynolds averaged (RANS) solver. Firstly, the flow field structure obtained by different calculation cases is studied, and the mechanism of the difference of flow field structure is described. Furthermore, by changing the accuracy of difference scheme for the convection term and the turbulence model, the different simulation results are compared with the experimental data. The deviation from numerical simulation compared with the experiment is further analyzed to clarify the critical factors affecting the calculation reliability. The results show that improving the accuracy of the scheme cannot effectively improve the calculation results, while choosing an appropriate turbulence model can be helpful to improve the calculation accuracy. When the numerical simulation of jet flow mixing in supersonic flow field is carried out, the conclusions of this study can provide a support for determining the numerical model method and error analysis.","PeriodicalId":502561,"journal":{"name":"Advances in Mechanical Engineering","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139297362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0