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The numerical simulation of the spray 喷雾的数值模拟
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-65
J. Cesenek
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引用次数: 0
Strain-rate dependent compressive properties of inverted honeycomb lattice and bulk cylindrical samples 3D printed by MSLA method 用MSLA方法3D打印倒蜂窝晶格和大块圆柱形样品的应变速率相关压缩特性
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-93
J. Falta, E. Yunus Yilmaz
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引用次数: 0
Fully polymeric distillation unit based on polypropylene hollow fiber membranes: Thermal performance analysis 基于聚丙烯中空纤维膜的全聚合蒸馏装置:热性能分析
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-161
J. Hvožďa, A. Strunga, T. Kůdelová
{"title":"Fully polymeric distillation unit based on polypropylene hollow fiber membranes: Thermal performance analysis","authors":"J. Hvožďa, A. Strunga, T. Kůdelová","doi":"10.21495/51-2-161","DOIUrl":"https://doi.org/10.21495/51-2-161","url":null,"abstract":": Water scarcity is one of the current threats for many people around the globe. Desalination processes are a crucial solution for areas with access to sea water on the one hand and with the inadequacy of fresh water on the other. Used technology, membrane distillation, is a thermally driven separation process using a porous membrane to set liquid and gas phases apart. Water evaporates and its vapour crosses the membrane’s pores. Polypropylene membrane modules and chaotic hollow fiber condenser were used to construct a (fully polymeric) sweep gas membrane distillation unit. Data of four membrane modules were measured to evaluate the unit thermal performance. Limitations lay in 1) the fiber (geometrical) separation of membrane modules, 2) proper utilization of the sweep gas velocity, and 3) improving condensation system. Still, the device shows a significant thermal efficiency ( > 60 %) even at low operating temperatures. Moreover, further improvements are concrete and reachable.","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68705186","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
Stability of beams under uniform loading q combined with end moments Ma and Mb 均布荷载q与端弯矩Ma和Mb联合作用下梁的稳定性
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-17
I. Baláž, Y. Koleková, D. Partov
{"title":"Stability of beams under uniform loading q combined with end moments Ma and Mb","authors":"I. Baláž, Y. Koleková, D. Partov","doi":"10.21495/51-2-17","DOIUrl":"https://doi.org/10.21495/51-2-17","url":null,"abstract":": Calculation of the critical moments M cr of the beams under various combinations of the uniform loading q and the end moments. Solution of the differential equations is presented in the graphical form. Two diagrams enable to obtain the factors C 1 and C 2 , which depend on the parameters and . Approximate formula for calculation of the critical moments depending on three factors C 1 , C 2 , C 3 and three dimensionless parameters , , was derived in (2000a). The values of the factors C 1 , C 2 , C 3 for basic loadings of the beams with the various combinations of the boundary conditions in vertical and horizontal bending and torsion for the monosymmetric I-sections were published in (2000b). They were later accepted for Eurocode (2007) and many national annexes. The presented results are valid for the beams simply supported with double symmetric I-sections. They may be used also for the continuous beams being slightly on the safe side. Numerical examples show that our results equal to the exact results of commercial computer programs. The procedure gives quickly practically exact results and therefore it is efficient tool for designers","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68705252","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
Theoretical and experimental analysis of reinforced concrete T-beam before strengthening 钢筋混凝土t梁加固前的理论与试验分析
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-25
J. Baran, T. Fecko, M. Jurgoš, V. Borzovič
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引用次数: 0
Influence of manufacturing variations of protuberant teeth shapes on gearing stresses of high-speed gearboxes 高速齿轮箱凸齿形状制造变化对齿轮应力的影响
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-261
Š. Morávka, J. Študent
{"title":"Influence of manufacturing variations of protuberant teeth shapes on gearing stresses of high-speed gearboxes","authors":"Š. Morávka, J. Študent","doi":"10.21495/51-2-261","DOIUrl":"https://doi.org/10.21495/51-2-261","url":null,"abstract":": The paper describes the solution of a current problem related to the technology of production of gear for high-speed gearboxes. The aim is to establish a reliable basis and procedure for evaluating the influence of manufacturing variations in the shape of the heel of the protuberant teeth on the stress and load capacity of the gearing. The capabilities of the software used so far bring rather uncertainty. A number of challenging FEA stress calculations for different variations of tooth heel shape deviations that occur in practice have been solved. The effect of changing the mechanical properties of the material with the depth of grinding is discussed. The results will be used both in the design of gearing and as a basis for deciding how to handle parts with defects, whether to continue using them or to scrap them. This will help to increase the efficiency of production and the reliability of gearboxes.","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68706037","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
Computational estimation of sealing gas blowby 密封气体吹散的计算估计
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-233
P. Kudláček, P. Novotný, J. Vacula
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引用次数: 0
Liquid cooling of LED car headlamps using polymeric hollow fibers 聚合物中空纤维LED汽车大灯的液体冷却
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-265
K. Mraz, T. Kroulíková, O. Resl
{"title":"Liquid cooling of LED car headlamps using polymeric hollow fibers","authors":"K. Mraz, T. Kroulíková, O. Resl","doi":"10.21495/51-2-265","DOIUrl":"https://doi.org/10.21495/51-2-265","url":null,"abstract":"","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68706090","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
Computational simulation of two-phase immiscible flow in horizontal pipeline 水平管道中两相非混相流动的计算模拟
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-241
F. Lunda, S. Fialová, M. Pírková
{"title":"Computational simulation of two-phase immiscible flow in horizontal pipeline","authors":"F. Lunda, S. Fialová, M. Pírková","doi":"10.21495/51-2-241","DOIUrl":"https://doi.org/10.21495/51-2-241","url":null,"abstract":"","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68706232","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
Modeling the moving cogwheel load --- Analysis using Ansys & MATLAB 移动齿轮载荷建模——Ansys & MATLAB分析
Gong Cheng Li Xue/Engineering Mechanics Pub Date : 2022-01-01 DOI: 10.21495/51-2-33
J. Bayer
{"title":"Modeling the moving cogwheel load --- Analysis using Ansys & MATLAB","authors":"J. Bayer","doi":"10.21495/51-2-33","DOIUrl":"https://doi.org/10.21495/51-2-33","url":null,"abstract":"","PeriodicalId":38731,"journal":{"name":"Gong Cheng Li Xue/Engineering Mechanics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68707165","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
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