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Parallel computation of seismic analysis of high arch dam

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Earthquake Engineering and Engineering Vibration 2008年第1期7卷 1-11页

作者：陈厚群马怀发涂劲成广庆唐菊珍 China Institute of Water Resources and Hydropower Research (IWHR) Beijing FEGEN software Co. Ltd.

Parallel computation programs are developed for three-dimensional meso-mechanics analysis of fully-graded dam concrete and seismic response analysis of high arch dams （ADs）, based on the Parallel Finite Element Program Generator （PFEPG）. The computational algorithms of the numerical simulation of the meso-structure of concrete specimens were studied. Taking into account damage evolution, static preload, strain rate effect, and the heterogeneity of the meso-structure of dam concrete, the fracture processes of damage evolution and configuration of the cracks can be directly simulated. In the seismic response analysis of ADs, all the following factors are involved, such as the nonlinear contact due to the opening and slipping of the contraction joints, energy dispersion of the far-field foundation, dynamic interactions of the dam-foundation- reservoir system, and the combining effects of seismic action with all static loads. The correctness, reliability and efficiency of the two parallel computational programs are verified with practical illustrations.

关键词： high arch dam contraction joints random aggregate model nonlinear seismic response parallelcomputation

Research on Three-Dimensional Simulation of the Internal Arc Gear Skiving

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Mechanical Engineering Science 2024年第1期6卷 35-40页

作者： Xiaoqiang WU Rui XUE Erkuo GUO Dongzhou JIA Taiyan GONG Zengrong LI Haijun YANG Xiaoxue LI Xin JIANG Shuai DING Yong LIU Shitian LI School of Mechanical and Traffic Engineering Ordos Institute of TechnologyOrdosInner Mongolia017000China Tianjin TANHAS Technology Co. LTDTianjin301600China School of Mechanical Engineering Jiangsu UniversityZhenjiangJiangsu212002China College of Mechanical Engineering and Automation Liaoning University of TechnologyJinzhouLiaoning121001China Inner Mongolia Ruite Precision Mould Co. LTD.The First Machinery GroupBaotouInner Mongolia014030China Inner Mongolia University Of Technology College Of Energy And Power EngineeringHohhotInner Mongolia010051China

Aiming at the problems that the simulation accuracy which is reduced due to the simplification of the model,a three-dimensional simulation method based on solid modeling is being *** analyzing the motion relationship and positional relationship between the caries knife and the workpiece,the coordinate system of the caries machining was *** the MATLAB software,the cutting edge model and the blade sweeping surface model of the boring cutter are sequentially *** operation is performed on the blade swept surface formed by the tooth cutter teeth with time t and the workpiece tooth geometry as well as the undeformed three-dimensional chip geometry model and the instantaneous cogging geometry model are obtained at different *** the compare between gear end face simulation tooth profile and the theoretical inner arc tooth profile,we verified the accuracy and rationality of the proposed method.

关键词： gear skiving undeformed three-dimensional chips solid modeling

Regulating microstructure and composition by carbonizing in-situ grown metal-organic frameworks on cotton fabrics for boosting electromagnetic wave absorption

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Nano Research 2024年第8期17卷 7290-7300页

作者： Jie Jin Hongsen Long Hu Liu Yan Guo Tiantian Bai Ben Bin Xu Mohammed A.Amin Hua Qiu Mohamed H.Helal Chuntai Liu Changyu Shen Zeinhom M.El-Bahy Zhanhu Guo State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410000China School of Electronic Engineering North China University of Water Resources and Electric PowerZhengzhou 450046China Complex Conditions of High-end Tire Technology Innovation Center Shuguang Rubber Industry Research&Design Institute Co.LtdGuilin 541004China Integrated Composites Lab Department of Mechanical and Civil EngineeringNorthumbria UniversityNewcastle Upon TyneNE18STUK Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Department of Chemistry Faculty of Arts and ScienceNorthern Border UniversityRafha 73213Saudi Arabia Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt

High-temperature carbonized metal-organic frameworks(MOFs)derivatives have demonstrated their superiority for promising electromagnetic wave(EMW)absorbers,but they still suffer from limited EMW absorption capacity and narrow *** the advantage of microstructure and chemical composition regulation for the design of EMW absorber,hierarchical heterostructured MoS_(2)/CoS_(2)-Co_(3)O_(4)@cabonized cotton fabric(CF)(MCC@CCF)is prepared by growing ZIF-67 MOFs onto CF surface,chemical etching,and *** from the dual loss mechanism of magnetic-dielectric multicomponent carbonized MOFs,chemical etching and carbonization process can effectively introduce abundant micro-gap structure that can result in better impedance matching and stronger absorption capacity via internal reflection,doped heteroatoms(Mo,N,S)to supply additional dipolar polarization loss,and numerous heterointerfaces among MoS_(2),CoS_(2),Co_(3)O_(4),and CCF that produce promoted conduction loss and interfacial polarization ***,a minimal reflection loss of−52.87 dB and a broadest effective absorption bandwidth of 6.88 GHz were achieved via tunning the sample thickness and filler loading,showing excellent EMW absorption *** research is of great value for guiding the research on MOFs derivatives based EMW absorbing materials.

关键词： metal-organic frameworks hierarchical structure chemical etching sulfurization electromagnetic wave absorption

Analysis and Comparison of Slope-cutting Widening Schemes in Highway Reconstruction and Expansion Project Based on MIDAS software

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Journal of Architectural Research and Development 2024年第2期8卷 75-83页

作者： Zhiqiang Qiu Yun Shi Lei Jiang China Merchants Chongqing Communications Technology Research&Design Institute Co. Ltd.Chongqing 400067China

In this paper,the geological condition of the right-side slope of the K114+694–K115+162 section of Yong-tai-wen Expressway is investigated and analyzed with the results showing that the strength of rock mass is the main contributor to the stability of the ***,two widening schemes are proposed,which are the steep slope with strong support and the gentle slope with general support *** static/slope module of MIDAS GTS finite element analysis software and the strength reduction method were used to compare the two *** results show that the steep slope with a strong support scheme has obvious advantages in land requisition,environmental protection,and safety and is more suitable for reconstructing and expanding the highway slope.

关键词： Highway reconstruction and expansion Slope excavation MIDAS GTS Scheme selection

A Research on Fatigue Analysis Method of Automobile Seam Weld Based on Improved Notch Stress Method

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A Research on Fatigue Analysis Method of Automobile Seam Wel...

Research on Quality Management Based on Continuous Integration Tool Chain

2022中国汽车工程学会年会暨展览会

作者： Yan Xin Yin Tingyu Wang Ying Wan Xiaofeng Cui Yaoyu Zhai Yunlong Zhou Xiyu Sun Jiamei Cheng Yuting Pei Yonghong FAW Jiefang Auto Co. Ltd. Siemens Industry software(Beijing)Co. Ltd.

Aiming at the seam weld fatigue cracking problem of a commercial vehicle suspension,the actual road load data are tested and extracted,and the rigid flexible hybrid multi-body dynamic model of the cab and suspension system is *** drives of the suspension subsystem are obtained through virtual load iteration,and the mode participation factor and the full field time-domain stress amplitude are obtained.A weld fatigue analysis method based on improved notch stress method is established,and the calculation results of various modeling methods are *** is proved that this weld fatigue analysis method has high calculation accuracy and mesh insensitivity which improves the engineering application of notch stress method,and provides a new guiding direction for life prediction and forward design of automobile weld structure.

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Research on Quality Management Based on Continuous Integrati...

Research on Vehicle OTA Design Based on Electronic and Electrical Architecture

2022中国汽车工程学会年会暨展览会

作者： Ma Yunlin Gang Yi Cai Chunmao Wang Wei Sun Xiaowu Liu Jun Wen Yong Yang Xiaoming Chongqing Changan Automotive software Technology Co. Ltd.

Standing at the forefront of the "software-defined car" era,intelligent network connection has become the focus of automotive software *** order to improve the delivery efficiency of software integration and the quality of software version,this paper proposes a quality management method based on continuous integration tool *** on the construction and layout of software quality *** 3 iterations of pilot project demonstrations,the software delivery time was shortened from 8 hours to less than 2 hours,and the version quality was significantly better than that of traditional *** quality management method is not only safe and stable,but also improves the efficiency of code construction and development,especially *** quality management provides a good reference and achieves the research purpose.

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Research on Vehicle OTA Design Based on Electronic and Elect...

ACCEL: an efflcient and privacy-preserving federated logistic regression scheme over vertically partitioned data

2023中国汽车工程学会年会暨展览会

作者： Ma Yunlin Liu Jun Cai Chunmao Wang Zhongcai Wen Yong Sun Xiaowu Chongqing Changan Automotive software Technology Co. Ltd.

OTA is an over-the-air upgrade technology,which provides the ability to continuously update software through *** OTA is limited by the electronic and electrical architecture,the upgrade time is long,and the controller is difficult to *** order to improve the stability of the vehicle OTA,shorten the upgrade time,and upgrade the large version of the vehicle,this paper proposes an OTA architecture design scheme,which realizes the standardization of the vehicle OTA upgrade,the unified control of the upgrade process,and the platformization of the *** design scheme can be applied to cross vehicle OTA design and can solve many problems such as mixed ECU controllers,long upgrade time,and *** solution has become a complete cloud to vehicle full link continuous update capability,which has great promoting significance for enhancing the value of intelligent connected vehicles.

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Science China(Information Sciences) 2022年第7期65卷 98-99页

作者： Jiaqi ZHAO Hui ZHU Fengwei WANG Rongxing LU Hui LI Zhongmin ZHOU Haitao WAN State Key Laboratory of Integrated Networks Services Xidian University Faculty of Computer Science University of New Brunswick China Mobile (Suzhou) software Technology Co. Ltd.

Dear editor,With the age of big data coming, massive data are being generated distributedly all the time and stored as the form of data islands; meanwhile, data privacy and security are strengthened with the introduction of some privacy laws, which thus bring huge challenges to traditional centralized machine learning. Consequently, federated learning(FL) [1], which can construct global machine learning models over multiple participants while keeping their data localized, gains widespread attention and shows its vast prospects in many fields [2]. At each training round of FL, the local updates are calculated locally with participants’ training data,

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Thermal-Fluid-Structure Coupling Analysis of Flexible Corrugated Cryogenic Hose

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China Ocean Engineering 2022年第4期36卷 658-665页

作者： YANG Liang LIU Miao-er LIU Yun LI Fang-qiu FAN Jia-kun LIU Fu-peng LU Zhao-kuan YANG Jian-ye YAN Jun CNOOC Gas&Power Group Co. Ltd.Beijing 100028China CNOOC Research Institute Co. Ltd.Beijing 100028China Offshore Oil Engineering Co. Ltd.Tianjin 300461China Ningbo Institute of Dalian University of Technology Ningbo 315016China State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering MechanicsInter-national Research Center for Computational MechanicsDalian University of TechnologyDalian 116024China

This work presents a numerical investigation of the thermal–fluid–structure coupling behavior of the liquid natural gas(LNG)transported in the flexible corrugated cryogenic hose.A three-dimensional model of the corrugated hose structure composed of multiple layers of different materials is established and coupled with turbulent LNG flow and heat transfer models in the commercial software ANSYS *** flow transport behavior,heat transfer across the hose layers,and structural response caused by the flow are *** studies are performed to evaluate the impacts of inlet flow rate and thermal conductivity of insulation material on the temperature and structural stress of the corrugated *** study found that,compared with a regular operating condition,higher inlet flow velocities not only suppress the heat gain of the LNG but also lower the flow-induced structural *** insulation layer exhibits excellent performance in maintaining the temperature at the fluid–structure interface,showing little temperature change with respect to material thermal conductivity and ambient *** simulation results may contribute to the research and design of the flexible corrugated cryogenic hoses and provide guidance for safer and more efficient field operations.

关键词： flexible corrugated cryogenic hose LNG computational fluid dynamics thermal–fluid–structure coupling