检索结果-南通市图书馆

Optimization on the Quantity of Vehicles in Car Interior Trim Assembly Line

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimization on the Quantity of Vehicles in Car Interior Tri...

Design on an Automotive Bearing and Retaining Ring Press-fit Device Based on Finite Element Simulation

作者： Chang-shui GAO Cheng-qing MA Dan HU Zhuang LIU Jian-chuan TIAN Guang-hua MAO College of mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics

Determining quantity of vehicles in an interior trim assembly line is a key problem for a car manufacturing *** paper presents a work to optimize quantity of vehicles for designing car assembly lines.A simulation model of the car interior trim assembly workshop was established using Siemens Plant Simulation *** on the entropy weight method and the TOPSIS method,the effect of various quantity vehicles was *** optimized solution for the number of vehicles was obtained *** to original design,the optimal solution can reduce the total cost of vehicles up to 6.96%.The calculation of variance for utilization rate of equipment has been reduced approximate 30%,which means the equipment utilization is more balanced than original design.

关键词： Plant Simulation Optimization Entropy weight method TOPSIS

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Design on an Automotive Bearing and Retaining Ring Press-fit...

Design and Strength Verification of LNG Cargo Enclosure System FSP Type

2022中国汽车工程学会年会暨展览会

作者： Tan Fenfang Song Zefang Tan Zhihang Hu Zhigang Zhou Bing Fan Lanlan Hu Yongxiang School of mechanical Engineering Wuhan Polytechnic University Wuhan University

In this paper,SolidWorks software was adopted to design a bearing and retaining ring press-fit device for new energy vehicle steering ***,the main mechanism of bearing and retaining ring press fitting device was designed and 3D modeling was completed by Solidworks ***,on the basis of the calculated maximum interference,finite element analysis of the bearing press-fit process and key components was carried out using ANSYS ***,nCode DesignLife software was used to perform fatigue analysis of the indenter and the box to predict the fatigue life of the indenter and the box and to verify the feasibility of the *** paper is a guide to improve the reliability of new energy vehicle bearing and retaining ring press-fitting equipment,improve the production efficiency of bearing and retaining ring press-fitting,and also for all kinds of devices that need press-fitting.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Modern mechanical Engineering 2019年第2期9卷 49-56页

作者： Zeng Ji Yuan Bo Feng Qi Chen Yan Shanghai Maritime University Offshore Engineering Technology Research Center Shanghai China Shanghai Honghua Ocean Oil & Gas equipment Co. Ltd. Shanghai China

The demand for natural gas in the world is increasing day by day. The efficient and flexible LNG becomes the preferred method for natural gas storage and transportation and has gradually entered people’s daily life. The enclosure system is the key core of LNG transport and storage vessels for storage of LNG at -163°C for isolation and thermal insulation. A new type of flat half-film prismatic LNG enclosure system has been developed for the shortcomings of the existing LNG cargo enclosure system. Through the breakthrough and mastery of key core technologies such as the overall layout and integration of the system, anti-leakage technology, liquid tank fixing technology, and large-scale friction stir welding (P-FSW) flat-line pipeline development technology, we’ll strive to fill the gap in the intelligent construction technology of large aluminum alloy tanks in China. The tank was subjected to water vapor test and numerical simulation. The results show that the structural strength of the FSP-LNG tank meets the strength check standard of IGC Code.

关键词： LNG Tank Water Vapor Test Numerical Simulation Strength

Cotton stalk restitution coefficient determination tests based on the binocular high-speed camera technology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2022年第4期15卷 181-189页

作者： Bingcheng Zhang Xuegeng Chen Rongqing Liang Jiali Li Xinzhong Wang Hewei Meng Za Kan College of mechanical and Electrical Engineering ShiHezi University Shihezi 832000XinjiangChina School of Agriculture Engineering Jiangsu University Zhenjiang 212013JiangsuChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000China

The restitution coefficient(RC)of cotton stalks is an important elementary physical parameter that is required to establish the crushing mechanical model and research the film residue separation *** this study,the calculation method of restitution coefficient considering the rotation motion of stalk-shaped agricultural materials was derived based on the principle of kinematics and the energy restitution coefficient method,and a test bench for measuring the RC was designed and *** effects of collision material,moisture content,length,diameter,release height,and collision angle respectively on the RC were investigated by single-factor experiments and orthogonal experiments,and the regression models between influence factors and the RC were *** results showed that Q235 showed the highest value of the RC,and it was followed by cotton stalks and soil lumps,*** RC of cotton stalks decreased with the increase of moisture content and diameter,while it increased at first and then decreased with the increase of *** the release height was less than 500 mm,the RC increased with the increased release *** the collision angle was less than 40°,the RC showed a linear increasing *** significance of the effects of factors on RC decreased with the following sequence:collision angle,length,release height,diameter,and moisture ***,collision angle,and release height were extremely *** contrast test results showed that the values based on Newton’s restitution coefficient method were smaller than that based on the energy restitution coefficient *** verification test showed that the predicted rebound height of cotton stalks calculated based on the energy restitution coefficient method was closer to the actual rebound height,and the relative error was less than 5%.

关键词： high-speed camera technology cotton stalk collision restitution coefficient determination test

3D/4D Printed Functional Continuous Fiber-reinforced Polymer Composites:Progress and Perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of mechanical Engineering(Additive Manufacturing Frontiers) 2023年第3期2卷 17-28页

作者： Ping Cheng Shixian Li Yong Peng Antoine Le Duigou Kui Wang Said Ahzi key laboratory of Traffic Safety on Track of Ministry of Education School of Traffic&Transportation EngineeringCentral South UniversityChangsha410075China ICube laboratory-French National Center for Scientific Research University of StrasbourgStrasbourgF-67000France Institute de Research Dupty de Lôme Bionics GroupUniversity of South BritanyLorientF-56100France

In recent years,innovations in 3D/4D printing techniques for continuous fiber-reinforced polymer composites(CFRPCs)have opened new perspectives for the integrated design and manufacture of composites with customized *** paper reviews the current state of 3D/4D printed functional composites,including the materi-als,shape memory/changing effects,self-monitoring/healing behaviors,and challenges surrounding additive-manufactured functional ***,continuous fibers and matrices that provide functional roles are classified and discussed in detail.4D printed shape memory and changing CFRPCs can retain their original shapes from a designed shape upon exposure to different external stimuli,including heat,electricity,humidity,and multi-stimuli ***,self-monitoring of structural health is achieved through the piezore-sistive features of reinforced fibers in 3D printed ***,this review concludes with an outlook on the future research opportunities for 3D/4D printed functional CFRPCs.

关键词： 3D/4D printing Continuous fiber Shape memory and changing self-monitoring self-healing

TAD-Net:An approach for real-time action detection based on temporal convolution network and graph convolution network in digital twin shop-floor[version 1;peer review:2 approved]

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Digital Twin 2021年第1期1卷 39-56页

作者： Qing Hong Yifeng Sun Tingyu Liu Liang Fu Yunfeng Xie School of mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China China Electronics Technology Group 28th Research Institute Nanjing210007China School of mechanical Engineering Southeast UniversityNanjing210096China

Background:Intelligent monitoring of human action in production is an important step to help standardize production processes and construct a digital twin shop-floor *** action has a significant impact on the production safety and efficiency of a shop-floor,however,because of the high individual initiative of humans,it is difficult to realize real-time action detection in a digital twin ***:We proposed a real-time detection approach for shop-floor production *** approach used the sequence data of continuous human skeleton joints sequences as the *** then reconstructed the Joint Classification-Regression Recurrent Neural Networks(JCR-RNN)based on Temporal Convolution Network(TCN)and Graph Convolution Network(GCN).We called this approach the Temporal Action Detection Net(TAD-Net),which realized real-time shop-floor production action ***:The results of the verification experiment showed that our approach has achieved a high temporal positioning score,recognition speed,and accuracy when applied to the existing Online Action Detection(OAD)dataset and the Nanjing University of Science and Technology 3 Dimensions(NJUST3D)***-Net can meet the actual needs of the digital twin ***:Our method has higher recognition accuracy,temporal positioning accuracy,and faster running speed than other mainstream network models,it can better meet actual application requirements,and has important research value and practical significance for standardizing shop-floor production processes,reducing production security risks,and contributing to the understanding of real-time production action.

关键词： Digital twin shop-floor Production action Real-time action detection TAD-Net TCN GCN

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

流程工业智能优化制造的基础理论与关键技术

Engineering 2017年第2期 14-27页

作者：钱锋钟伟民杜文莉 key laboratory of Advanced Control and Optimization for Chemical Processes Ministry of EducationEast China University of Science and Technology

本文围绕流程工业转型升级的重大需求,剖析了当前流程工业在经营决策层面、生产运行层面、能效安环层面和信息集成层面存在的主要问题,提出了利用现代信息技术从生产、管理以及营销全过程优化出发,推进以高效化、绿色化和智能化制造为... 详细信息

本文围绕流程工业转型升级的重大需求,剖析了当前流程工业在经营决策层面、生产运行层面、能效安环层面和信息集成层面存在的主要问题,提出了利用现代信息技术从生产、管理以及营销全过程优化出发,推进以高效化、绿色化和智能化制造为目标的流程工业智能优化制造的愿景目标。围绕制造过程从装备智能化到制造流程、操作模式、供应链管理等自适应智能优化,以需求驱动、应用导向为主,提出了当前亟须研究的核心工程科学问题,即:(1)生产与经营全过程信息智能感知与集成;(2)知识驱动的生产过程计划调度与管理决策;(3)人机物自然交互的生产过程全流程协同控制与优化;(4)全生命周期安全环境足迹监控与风险溯源分析及控制。并围绕核心科学问题进一步提出了拟突破的流程工业智能优化制造的基础理论与关键技术。

关键词：流程工业智能优化制造绿色制造高端制造最优性评价

Calibration and test of the contact parameters for chopped cotton stems based on discrete element method

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

International Journal of Agricultural and Biological Engineering 2022年第5期15卷 1-8,F0003页

作者： Rongqing Liang Xuegeng Chen Bingcheng Zhang Xinzhong Wang Za Kan Hewei Meng College of mechanical and Electrical Engineering Shihezi University Shihezi 832000XinjiangChina Engineering Research Center for Production Mechanization of Oasis Special Economic Crop Ministry of EducationShihezi 832000XinjiangChina School of Agriculture Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

In view of the fact that the existing cotton stem simulation models are simplified and have a large discrepancy from the actual appearance and the contact parameters have not been *** this study,the simulation model and numerical simulation were established using the discrete element software *** a second-order response model between contact parameters and repose angle had been *** test result showed that the static friction coefficient,rolling friction coefficient,and coefficient of restitution between cotton stems were crucial factors affecting the repose *** determination coefficient corrected determination coefficient and p-value of the second-order response model were R^(2)=0.959,R^(2)_(adj)=0.921,and phigh interpretation and predictability,this study can provide a certain theoretical basis and data support for the setting of contact parameters in the data simulation of cotton stem harvesting and processing,mechanically-harvested film residue crushing and film stem separation,etc.

关键词： discrete element method cotton stem repose angle contact parameters calibration

Influence of deformation zone length on bending radius of SS304 tubes with small diameters manufactured via free bending-based active motion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第6期36卷 420-434页

作者： Shenghan HU Cheng CHENG Ali Abd EL-ATY Shuo ZHENG Xunzhong GUO Chunmei LIU Jie TAO College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 21ll00China Department of Materials Science and Engineering&RIAM Seoul National UniversityI-Gwanak-roGwanakguSeoul 08826Republic of Korea mechanical Engineering Department Faculty of Engineering-HelwanHelwan UniversityCairo 11795Egypt

In three and six-axis free-bending equipment,the deformation zone length(A)is a fixed mechanical structure parameter modified when the relevant structure is redesigned and *** this study,a six degree of freedom(6-DOF)parallel mechanism was used as the control mechanism of the bending die,and a new method of changing the deformation zone length(A)was ***,an idealized geometric model of free bending-based active motion was ***,the influence of the deformation zone length(A)on the bending moment and the bending radius of the tube was *** addition,the finite element simulation and a kinematic model of free bending-based active motion controlled by the 6-DOF parallel mechanism were established,and bending processes of the SS304 tube with different deformation zone lengths were ***,the impact of the deformation zone length(A)on the bending radius,bending moment,wall thickness,and motion of the parallel mechanism were ***,experiments were carried out on the free-bending equipment based on the 6-DOF parallel *** verified the rules in the theoretical analysis,finite element simulation,and kinematic simulation.

关键词： Bending radius Deformation zone length 6-DOF parallel mechanism Free bending-based active motion Small diameter tube