Journal of Mechanical Science and Technology最新文献

Numerical study of the sand distribution inside a diesel locomotive operating in wind-blown sand environment 风吹沙环境下内燃机车内部沙粒分布的数值研究

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-06 DOI: 10.1007/s12206-024-0823-4

Chen Jiang, Xuelian Zeng, Chen Hong, Franklin C. Eze, Wei Zhou

{"title":"Numerical study of the sand distribution inside a diesel locomotive operating in wind-blown sand environment","authors":"Chen Jiang, Xuelian Zeng, Chen Hong, Franklin C. Eze, Wei Zhou","doi":"10.1007/s12206-024-0823-4","DOIUrl":"https://doi.org/10.1007/s12206-024-0823-4","url":null,"abstract":"Large quantities of sand carried by crosswinds often settle in the cabin of diesel locomotives operating in desert regions. This study adopts an Euler-Lagrange two-phase flow model to simulate sand movement and deposition in a running diesel locomotive through the ventilation grilles. The realistic sand particle diameter distribution obtained from the field test is incorporated by the Rosin-Rummler model in computational fluid dynamics software. The realizable k-ε turbulent model is adopted to simulate the turbulence. The operation of the locomotive on a straight track at 200 km/h with five different crosswind velocities is studied numerically. The simulation results indicate that the increment of crosswind speed leads to higher pressure on the grille and the velocity of the internal flow field. The relationship between the number of sand particles trapped inside the car and the incident angle (i.e., resultant wind angle) is discovered. It is evident that the majority of sand particles enter the compartment through the windward tail grilles. Therefore, the influence of adjusting the tilt angle of the tail grille on the sand entering the locomotive cabin is calculated. It is discovered that the compartment experiences the least sand deposition at a 30° title angle. Therefore, optimizing the tilt angle of the frame for grilles can significantly enhance the filtering of the grille.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"4 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Kriging-PSO-based shape optimization for railway wheel profile 基于 Kriging-PSO 的铁路车轮轮廓形状优化技术

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0827-0

Long Liu, Bing Yi, Xiaofei Shi, Xiang Peng

{"title":"Kriging-PSO-based shape optimization for railway wheel profile","authors":"Long Liu, Bing Yi, Xiaofei Shi, Xiang Peng","doi":"10.1007/s12206-024-0827-0","DOIUrl":"https://doi.org/10.1007/s12206-024-0827-0","url":null,"abstract":"The reduction of wheel-rail wear is a fundamental task in railway engineering that significantly affects the operating performance in the lifecycle. To improve the dynamic response and profile wear evolution performance of wheel-rail interaction, a shape optimization procedure for the railway wheel profile is proposed. First, the geometry modeling method, which ensures the continuity of first-order derivation of the wheel profile, is introduced to generate a large number of candidate profiles, and multibody dynamics simulation is conducted to analyze the dynamics response of the wheel profiles, including wear index, lateral force, lateral acceleration of the frame and derailment coefficient. Then, the Kriging model is constructed to establish the relationship between the design variables and objectives obtained by multibody dynamics simulation, and particle swarm optimization (PSO) is employed to evaluate the optimal parameters for wheel profile that simultaneously considers wheel wear, stability, and lateral force. Finally, the performance of the wheel-rail interaction is evaluated to demonstrate the effectiveness of the proposed method. The numerical simulation result indicates that the optimized wheel profile not only has good performance, including contact state, pressure, and friction at the design stage, but also the physical performance is acceptable after a long-term profile evolution during service, which the maximum wear depth of the optimal wheel profile averagely decreases over 10 % in long-term wear evolution.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"114 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142198846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of vitreous carbon grid structures by carbonization of 3D printed parts for water-oil separation 通过碳化三维打印部件制造玻璃碳网格结构，实现水油分离

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-2409-6

Ju Wan Kim, Chanwoo Kim, Hyunjin Na, Seongmin Lee, Suyeon Seok, Seongyong Byeon, Young Kyu Kim, Seok-min Kim

引用次数: 0

Loss map for aeroengine turbine blade equipped with tip inlet squealer 配备叶尖进气尖叫器的航空涡轮叶片损耗图

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0825-2

Jae Sung Jeong, Sang Woo Lee

引用次数: 0

Dynamic analysis of refueling characteristics of hydrogen refueling station 加氢站加氢特性的动态分析

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0826-1

Dong Hee Hong, Si Heon Kim, Sarng Woo Karng, Gwang Hoon Rhee

引用次数: 0

Active noise control of vibroacoustic noise from HVAC system in autonomous bus using conjugate gradient-based algorithm 利用基于共轭梯度的算法对自主公交车暖通空调系统的振动声学噪声进行主动噪声控制

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0804-7

Orhun Okcu, Seongyeol Kim, Sang-Kwon Lee

{"title":"Active noise control of vibroacoustic noise from HVAC system in autonomous bus using conjugate gradient-based algorithm","authors":"Orhun Okcu, Seongyeol Kim, Sang-Kwon Lee","doi":"10.1007/s12206-024-0804-7","DOIUrl":"https://doi.org/10.1007/s12206-024-0804-7","url":null,"abstract":"The paper presents a new active control algorithm for the active cancellation of vibroacoustic noise radiated from the compressor installed under each passenger’s seat in autonomous bus. The compressor is used for a heating, ventilation, and air-conditioning (HVAC) system which provide air conditioning for each passenger in autonomous bus. The sound radiated from the compressor of the HVAC system is a high-frequency annoyance noise caused by vibroacoustic noise due to the shell vibration of the compressor. The dominant frequency components of the vibroacoustic noise are harmonics of the rotation frequency of the reciprocating compressor. The HVAC system generates vibroacoustic noise dominantly in the frequency range between 200 and 600 Hz. Such noise is not only distinctly perceptible but also contributes to passenger discomfort and negatively impacts the perceived quality of the vehicle. The aim of this paper is to attenuate the vibroacoustic noise of the HVAC system by developing an active noise control (ANC) system. Generally, the widely recognized filtered-X least mean squared (FXLMS) algorithm has been successfully implemented to active noise control of reciprocating compressor. However, its performance was found lacking outside the peak frequency of compressor operation noise. To address this, the conjugate gradient algorithm was employed to enhance ANC performance. The conjugate gradient algorithm has a lower residual error and faster convergence rate compared to the FXLMS algorithm. As a consequence, the implementation of the conjugate gradient-based ANC algorithm resulted in enhanced noise reduction not only at the peak frequencies, which correspond to the compressor operation frequency, but also in frequency ranges outside these peak frequencies.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"10 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic load acquisition method for a crawler driving structure of a roadheader robot under random road 随机路面下掘进机器人履带驱动结构的动态负载采集方法

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0814-5

Yang Liu, Hong Zhang, Yang Song, Xiaobing Chen, Guozhu Yin

{"title":"Dynamic load acquisition method for a crawler driving structure of a roadheader robot under random road","authors":"Yang Liu, Hong Zhang, Yang Song, Xiaobing Chen, Guozhu Yin","doi":"10.1007/s12206-024-0814-5","DOIUrl":"https://doi.org/10.1007/s12206-024-0814-5","url":null,"abstract":"A method utilizing an embedded sensing system to determine the dynamic load is proposed to address the problem of not being able to directly obtain the dynamic load time history of a crawler driving structure in the harsh underground working environment of a coal mine roadheader robot. A crawler driving structure and its embedded sensing system are designed. A rigid–flexible coupling simulation model of the roadheader robot is established, and the dynamic load time history parameters of the crawler obtained from the simulation and test data are compared and analyzed. Results show that the load fluctuation of the tested track plate at the idler and sprocket is significant. By contrast, the fluctuation of the free segment is minimal. The load fluctuation range of the support segment of the hard road is −5–15 MPa, and that of the soft sand road is −10–25 MPa. Moreover, the track plate exhibits noticeable warping and winding phenomenon relative to the road wheel on the soft sand road. The changing trend of the crawler dynamic load time history obtained from simulation and test is relatively consistent. This study provides a reference for the crawler driving structure’s structural optimization and reliability research.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"44 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D printed phantoms for medical imaging: recent developments and challenges 用于医学成像的 3D 打印模型：最新进展与挑战

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-2407-8

Marie Wegner, Dieter Krause

{"title":"3D printed phantoms for medical imaging: recent developments and challenges","authors":"Marie Wegner, Dieter Krause","doi":"10.1007/s12206-024-2407-8","DOIUrl":"https://doi.org/10.1007/s12206-024-2407-8","url":null,"abstract":"The rapid growth of 3D printing technology has transformed different fields in medicine, for example the fabrication of medical phantoms - physical models mimicking biological tissue in medical imaging and therapy. These phantoms play a crucial role in quality assurance, education, research and training. Unlike traditional methods, 3D printing enables the creation of anatomically accurate, cost-effective, modular, and customizable phantoms with high geometric freedom. A key advantage is the ability to produce patient-based models, tailored to individual anatomies and pathologies using medical imaging data. The workflow involves processing imaging data, refining 3D models, and selecting suitable 3D printing materials. This overview focuses on the workflow, types of phantoms, and the selection of printing techniques and materials. Besides numerous opportunities, challenges include standardization, validation procedures, and ensuring reliability across different systems. The potential of 3D printing in medical phantom development is evident, promising realistic, cost-effective, and personalized solutions for improved medical research.","PeriodicalId":16235,"journal":{"name":"Journal of Mechanical Science and Technology","volume":"30 1","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225505","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of the mathematical modelling of thermophysical properties during the pyrolysis of coking coals 焦煤热解过程中热物理性质数学建模评估

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0848-8

Selvakumar Kumaresh, Man Young Kim

引用次数: 0

Inter electrode gap detection in electrochemical machining with electroforming planar coils 使用电铸平面线圈进行电化学加工时的电极间隙检测

IF 1.6 4区工程技术

Journal of Mechanical Science and Technology Pub Date : 2024-09-05 DOI: 10.1007/s12206-024-0830-5

Xiaohu Zheng, Zhouzhi Gu

引用次数: 0