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THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS AND ALLOWABLE DEFECT ASSESSMENT OF THE CENTRIFUGE BOWL BODY

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维普期刊数据库

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Transactions of Nonferrous Metals Society of China 1996年第1期6卷 141-146页

作者： Xu Zhenxing Chen Fanjun Wang Zhaoqi Xu Yan Liu Yaodong Chen Yijun Mechanical Engineering Department Xiangtan UniversityXiangtan 411105 Shanghai Branch of 701 Research Institute of General Co.of Shipping industry of China Xiangtan Centrifuge Plant

For the first time,an allowable defect analysis of the bowl body of XZZ 1200-G Centrifuge was made by using fatigue fracture mechanics method;and,again for the first time,the design fatigue curve of the dangerous sect... 详细信息

关键词： bowl body of centrifuge fatigue fracture mechanics method crack

Prediction of blast furnace gas generation based on data quality improvement strategy

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维普期刊数据库

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Journal of Iron and Steel Research International 2023年第5期30卷 864-874页

作者： Shu-han Liu Wen-qiang Sun Wei-dong Li Bing-zhen Jin Department of Energy Engineering School of MetallurgyNortheastern UniversityShenyang 110819LiaoningChina State Environmental Protection Key Laboratory of Eco-industry(Northeastern University) Ministry of Ecology and EnvironmentShenyang 110819LiaoningChina State Key Laboratory of Metal Material for Marine Equipment and Application Anshan 114009LiaoningChina Ansteel Iron and Steel Research Institute Ansteel Group Corporation LimitedAnshan 114009LiaoningChina General Heavy section Mill Angang Steel Company LimitedAnshan 114021LiaoningChina

The real-time energy flow data obtained in industrial production processes are usually of low *** is difficult to accurately predict the short-term energy flow profile by using these field data,which diminishes the effect of industrial big data and artificial intelligence in industrial energy *** real-time data of blast furnace gas(BFG)generation collected in iron and steel sites are also of low *** order to tackle this problem,a three-stage data quality improvement strategy was proposed to predict the BFG *** the first stage,correlation principle was used to test the sample *** the second stage,the original sample set was rectified and *** the third stage,Kalman filter was employed to eliminate the noise of the updated sample *** method was verified by autoregressive integrated moving average model,back propagation neural network model and long short-term memory *** results show that the prediction model based on the proposed three-stage data quality improvement method performs *** short-term memory model has the best prediction performance,with a mean absolute error of 17.85 m3/min,a mean absolute percentage error of 0.21%,and an R squared of 95.17%.

关键词： Blast furnace gas Iron and steel industry Data quality improvement Artificial intelligence Gas generation prediction

Modeling the effects of mechanical parameters on the hydrodynamic behavior of vertical current classifiers

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维普期刊数据库

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International Journal of Mining Science and Technology 2014年第1期24卷 123-127页

作者： Arabzadeh Jarkani Soroush Khoshdast Hamid Shariat Elaheh Sam Abbas Mining Engineering Department Faculty of EngineeringShahid Bahonar University Mining Engineering Department College of Mining and IndustryShahid Bahonar University

This study modeled the effects of structural and dimensional manipulations on hydrodynamic behavior of a bench vertical current classifier. Computational fluid dynamics （CFD） approach was used as modeling method, and turbulent intensity and fluid velocity were applied as system responses to predict the over- flow cut size variations. These investigations showed that cut size would decrease by increasing diameter and height of the separation column and cone section depth, due to the decrease of turbulent intensity and fluid velocity. As the size of discharge gate increases, the overflow cut-size would decrease due to freely fluid stream out of the column. The overflow cut-size was significantly increased in downward fed classifier compared to that fed by upward fluid stream. In addition, reforming the shape of angular overflow outlet＇s weir into the curved form prevented stream inside returning and consequently unselec- tire cut-size decreasing.

关键词： Hydraulic classifier Modeling Computational fluid dynamic Cut size

Residual Curvature of Longitudinal Profile Plate Roller in Leveling Process

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Journal of Iron and Steel Research International 2013年第10期20卷 23-27页

作者： CUI Li SHI Quan-qiang LIU Xiang-hua HU Xian-lei Aviation industry Corporation of China Shenyang Aircraft Corporation Institute of Metal Research Chinese Academy of Sciences State Key Laboratory of Rolling and Automation Northeastern University

Roller leveling process of longitudinal profile （LP） plate is hardly studied because plate thickness changes. Deformation characteristics and residual curvature during LP plate leveling process were investigated based on curva ture integral by elastic plastic differences. It was found that entry intermesh section is reduced with increasing thick- ness and entry intermesh should be from 0.7 to 1.1 mm for LP plate with 42/54 mm in thickness. In order to get satisfactory flatness along longitudinal direction, small entry intermesh should be selected and exit intermesh should be 0 ram. In addition, thickness section for I.P plate which can be leveled by 11 roller leveler is from 24 to 60 mm. Finally, there is an intermesh schedule that could level LP plate with initial curvature less than elastic limit curvature.

关键词： roller leveling LP plate intermesh residual curvature residual stress

日本有害废物处理的现状及今后发展方向——处理、再资源化技术

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世界环境 1989年第3期 34-38,33页

作者： Hitoichi Sato 李毅平 Pollution Control section Local Pollution Dept. Ministry of Trade and industry

当前在日本现有资源、能源和环境保护现状的条件下,还未根据处理废物,特别是难处理的废物的性质、数量变化,确立经济合理的废物处理、再资源化体系。库奈节根据物料平衡法则(从原料或化石燃料中取出的物质和能量使用后并未完全消失,过... 详细信息

当前在日本现有资源、能源和环境保护现状的条件下,还未根据处理废物,特别是难处理的废物的性质、数量变化,确立经济合理的废物处理、再资源化体系。库奈节根据物料平衡法则(从原料或化石燃料中取出的物质和能量使用后并未完全消失,过一段时间就会变成必须进行处置的液体或固体废物)提出,废物的产生是伴随经济发展而出现的普遍现象,国民收入水平和废物产生量有着密切的关系。今后不仅废物量还会增加,而且随着产品的高级化和复杂化,废物在质量方面也会发生变化,因而应尽快建立适宜的处理、处置、再资源化。体系。

关键词：资源化技术固体废物环境保护现状废电池化石燃料物料平衡数量变化国民收入水平高级化废水处理设施

Ground-based and additional science support for SMILE

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Earth and Planetary Physics 2024年第1期8卷 275-298页

作者： J.A.Carter M.Dunlop C.Forsyth K.Oksavik E.Donovon A.Kavanagh S.E.Milan T.Sergienko R.C.Fear D.G.Sibeck M.Connors T.Yeoman X.Tan M.G.G.T.Taylor K.McWilliams J.Gjerloev R.Barnes D.D.Billet G.Chisham A.Dimmock M.P.Freeman D.-S.Han M.D.Hartinger S.-Y.W.Hsieh Z.-J.Hu M.K.James L.Juusola K.Kauristie E.A.Kronberg M.Lester J.Manuel J.Matzka I.McCrea Y.Miyoshi J.Rae L.Ren F.Sigernes E.Spanswick K.Sterne A.Steuwer T.Sun M.-T.Walach B.Walsh C.Wang J.Weygand J.Wild J.Yan J.Zhang Q.-H.Zhang Planetary Sciences Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory Space Science Technology Facilities CouncilOxfordshireUK School of Space and Environment Beihang UniversityBeijing 100191China Key Laboratory of Space Environment Monitoring and Information Processing Ministry of Industry and Information TechnologyBeijing 100017China Department of Space and Climate Physics UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for Space Science Department of Physics and Technology.University of BergenBergenNorway Department of Physics and Astronomy University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 British Antarctic Survey CambridgeUK Swedish Institute of Space Physics KirunaSweden West Highfield Campus University of SouthamptonUniversity RoadSO171BJUK Goddard Space Flight Center NASAGreenbeltMarylandUSA Athabasca University AthabascaCanada ESTEC European Space AgencyNetherlands University of Saskatchewan SaskatoonCanada The Johns Hopkins University Applied Physics Laboratory LaurelMarylandUSA Swedish Institude of Space Physics UppsalaSE 75121Sweden Tongji University Shanghai 200092China Center for Space Plasma Physics Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Research Institute of China Shanghai 200136China Finnish Meteorological Institute(FMI) Finland Department of Earth and Environmental Sciences(Geophysics) Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian Space Agency MontrealCanada GFZ German Research Centre for Geosciences PotsdamGermany Nagoya University Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northumbria University Newcastle upon TyneTyne and WearUK NE18ST National Space Science Center Chinese Academy SciencesBeijing 100190China Arctic Geophysics University Centre in Svalbard

The joint European Space Agency and Chinese Academy of Sciences Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission will explore global dynamics of the magnetosphere under varying solar wind and interplanetary magnetic field conditions,and simultaneously monitor the auroral response of the Northern Hemisphere *** these large-scale responses with medium and fine-scale measurements at a variety of cadences by additional ground-based and space-based instruments will enable a much greater scientific impact beyond the original goals of the SMILE ***,we describe current community efforts to prepare for SMILE,and the benefits and context various experiments that have explicitly expressed support for SMILE can offer.A dedicated group of international scientists representing many different experiment types and geographical locations,the Ground-based and Additional Science Working Group,is facilitating these *** include constructing an online SMILE Data Fusion Facility,the discussion of particular or special modes for experiments such as coherent and incoherent scatter radar,and the consideration of particular observing strategies and spacecraft *** anticipate growing interest and community engagement with the SMILE mission,and we welcome novel ideas and insights from the solar-terrestrial community.

关键词： magnetosphere ionosphere magnetosphere-ionosphere coupling ground-based experimentation SMILE conjunctions missions

GENERAL ANALYTIC SOLUTION OF DYNAMIC RESPONSE OF BEAMS WITH NONHOMOGENEITY AND VARIABLE CROSS-section

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Applied Mathematics and Mechanics(English Edition) 1992年第9期13卷 779-791页

作者：叶开沅童晓华纪振义 Lanzhou University Lanzhou University of Toronto TorontoCanada Zhejiang University Hangzhou University of Toronto Toronto Canada Anhui Architectural industry College Hefei

In this paper, a new method, the step-reduction method, is proposed to investigate the dynamic response of the Bernoulli-Euler beams with arbitrary nonhomogeneity and arbitrary variable cross-section under arbitrary loads. Both free vibration and forced vibration of such beams are studied. The new method requires to discretize the space domain into a number of elements. Each element can be treated as a homogeneous one with uniform thickness. Therefore, the general analytical solution of homogeneous beams with uniform cross-section can be used in each element. Then, the general analytic solution of the whole beam in terms of initial parameters can be obtained by satisfying the physical and geometric continuity conditions at the adjacent elements. In the case of free vibration, the frequency equation in analytic form can be obtained, and in the case of forced vibration, a final solution in analytical form can also be obtained which is involved in solving a set of simultaneous algebraic equations with only two unknowns which are independent of the numbers of elements divided. The present analysis can also be extended to the study of the vibration of such beams with viscous and hysteretic damping and other kinds of beams and other structural elements with arbitrary nonhomogeneity and arbitrary variable thickness.

关键词： Damping Dynamic loads Dynamic response Finite element method Mathematical models Vibrations (mechanical)

Speed Spatial Distribution Models for Traffic Accident section of Freeway Based on Computer Simulation

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Journal of Harbin Institute of Technology(New Series) 2015年第3期22卷 123-128页

作者： Decai Li Jiangwei Chu Wenhui Zhang Xiaojuan Wang Guosheng Zhang Traffic College Northeast Forestry University Key Laboratory of Operation Safety Technology of Transport Vehicles of Transportation industry Research Institute of Highway Ministry of Transport

Simulation models for accident section on freeway are built in microscopic traffic flow simulation environment. In these models involving 2-lane,3-lane and 4-lane freeway,one detector is set every 10 m to measure section running speed. According to the simulation results,speed spatial distribution curves for traffic accident section on freeway are drawn which help to determine dangerous sections on upstream of accident section. Furthermore,the speed spatial distribution models are obtained for every speed distribution curve. The results provide theoretical basis for determination on temporal and spatial influence ranges of traffic accident and offer reference to formulation of speed limit scheme and other management measures.

关键词： traffic safety freeway accident section speed distribution simulation

Saturated hydraulic conductivity of compacted bentonite-sand mixtures before and after gas migration in artificial seawater

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Journal of Rock Mechanics and Geotechnical Engineering 2023年第1期15卷 216-226页

作者： Yasutaka Watanabe Shingo Yokoyama Misato Shimbashi Yoichi Yamamoto Takahiro Goto Sustainable System Research Laboratory Central Research Institute of Electric Power IndustryChibaJapan Science and Technology Department Nuclear Waste Management Organization of JapanTokyoJapan

To understand the self-healing property of an engineered barrier for radioactive waste disposal,the hydraulic conductivity of compacted bentoniteesand mixtures saturated with artificial seawater(SW)before and after gas migration was ***-and Ca-bentonites were mixed with fine sand at a ratio of 70%bentonite in dry *** aspects were considered during the experiment:the hydraulic conductivity of the specimen that was resaturated after gas migration and the distribution of water content immediately after gas migration to study gas migration *** gas migrated through the entire cross-section of the specimen,and gas breakthrough occurred in the equilibrium swelling pressure range ***,the gas flow rate reached a sufficient large value when the gas pressure was approximately twice the equilibrium axial pressure(the sum of swelling and confining pressures),which excluded the back *** the gas migration pathway was not visible when the specimen was observed immediately after gas migration,the water content distribution showed that several parts of the specimen with lower water content were connected in the direction of gas *** resaturation,the change in permeability was within a limited rangedtwo to three times larger than that before gas migration for each type of bentonite in *** slight change suggests that gas migration creates a pore structure that cannot be sealed via crystalline swelling of montmorillonite in SW,even if highly compacted bentonite is used under a constant-volume condition.

关键词： Bentonite Gas migration Hydraulic conductivity Seawater(SW) Self-healing