Dispatching of Automated Guided Vehicle (AGV) is a key decision problem in Automated Container Terminal. In view that existing event-driven AGV dispatching methods may lead to remarkable quay crane waiting for tardy AGV, and existing once-for-all dispatching methods are not suitable for real automated container terminal, a simulation-based AGV dispatching method is proposed in this paper. In this method, AGV arrival time at quay cranes is repeatedly re-estimated after allocation, and AGVs are allocated in a way that waiting time of quay cranes could be minimized. Results of comparative experiments shows that, this simulation-based method outperforms some other rule-based method, in perfectly keeping quay cranes out of waiting for tardy AGVs, and in slightly shortening finish time of vessel handling. This method is now applied to some real automated container terminal.
{"title":"Simulation-Based AGV Dispatching in Automated Container Terminal","authors":"Bian Zhicheng, Zhang Yaozhou, Zhang Xuemin, Xiao Yansong, Chai Jiaqi, M. Wei-jian","doi":"10.1109/ICACMVE.2019.00085","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00085","url":null,"abstract":"Dispatching of Automated Guided Vehicle (AGV) is a key decision problem in Automated Container Terminal. In view that existing event-driven AGV dispatching methods may lead to remarkable quay crane waiting for tardy AGV, and existing once-for-all dispatching methods are not suitable for real automated container terminal, a simulation-based AGV dispatching method is proposed in this paper. In this method, AGV arrival time at quay cranes is repeatedly re-estimated after allocation, and AGVs are allocated in a way that waiting time of quay cranes could be minimized. Results of comparative experiments shows that, this simulation-based method outperforms some other rule-based method, in perfectly keeping quay cranes out of waiting for tardy AGVs, and in slightly shortening finish time of vessel handling. This method is now applied to some real automated container terminal.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127477963","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00083
R. Wu, L. Qin
90° circular pipe bend is used in various hydraulic pipeline system. The study of its internal flow characteristics is helpful to understand the dynamic and static performance of pipeline system and provide a theoretical basis for pipeline design. Complex phenomena of flow separation and secondary flow are obtained by numerical simulation. The separation point and the reattachment point in flow separation are less dependent on Reynolds number, but more dependent on the curvature ratio of the pipe bend. When curvature ratio Rc/D>1, the backflow disappears and the flow separation is suppressed. The energy loss mechanism in pipeline is studied by effective work analysis. Flow separation, secondary flow and dean vortex cannot do effective work, and they are the reason of energy loss caused by the flow through a 90° circular pipe bend.
{"title":"Numerical Study on Flow Characteristics and Energy Loss Mechanism in the 90° Circular Pipe Bend","authors":"R. Wu, L. Qin","doi":"10.1109/ICACMVE.2019.00083","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00083","url":null,"abstract":"90° circular pipe bend is used in various hydraulic pipeline system. The study of its internal flow characteristics is helpful to understand the dynamic and static performance of pipeline system and provide a theoretical basis for pipeline design. Complex phenomena of flow separation and secondary flow are obtained by numerical simulation. The separation point and the reattachment point in flow separation are less dependent on Reynolds number, but more dependent on the curvature ratio of the pipe bend. When curvature ratio Rc/D>1, the backflow disappears and the flow separation is suppressed. The energy loss mechanism in pipeline is studied by effective work analysis. Flow separation, secondary flow and dean vortex cannot do effective work, and they are the reason of energy loss caused by the flow through a 90° circular pipe bend.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124207230","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00009
Wang Xin, Sun Xin, Liu Fuming, Xue Chengbin, Fu Heling
The loads and deformations of wire ropes are very important to suspend a slender structure. As a typical case of slender structure, the long hang lamp and its layout of hanging points are analyzed. The finite element models of the hang lamp piece with/without wire ropes are built by ANSYS. After nonlinear analysis, the results of stress and displacement of two models are compared. The comparison results show that the model with wire rope is more reasonable. And the successful installation of the hanging lamp also shows the rationality of this model. Therefore, the wire rope model is necessary for large slender structure, which can embody actually coupling relationship between load and displacement.
{"title":"Analysis of Flexible Lamp with Multiple Hanging Points","authors":"Wang Xin, Sun Xin, Liu Fuming, Xue Chengbin, Fu Heling","doi":"10.1109/ICACMVE.2019.00009","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00009","url":null,"abstract":"The loads and deformations of wire ropes are very important to suspend a slender structure. As a typical case of slender structure, the long hang lamp and its layout of hanging points are analyzed. The finite element models of the hang lamp piece with/without wire ropes are built by ANSYS. After nonlinear analysis, the results of stress and displacement of two models are compared. The comparison results show that the model with wire rope is more reasonable. And the successful installation of the hanging lamp also shows the rationality of this model. Therefore, the wire rope model is necessary for large slender structure, which can embody actually coupling relationship between load and displacement.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121569821","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00064
Zhang Yanwei, Wang Yingchun, Cai Mengdie
Aiming at the berth allocation problem of mixed berth layout with both Indented Berths and Marginal Berths, a Mixed Integer Programming Model is constructed to minimize the total ship arrival time and customer dissatisfaction. Then, the Separate Strategy in which Indented Berths serve only large container ships and Marginal Berths serve only small container ships is introduced, and the Integrated Strategy of Indented Berths and Marginal Berths serving both large and small container ships is proposed as well. To solve the model, a Genetic Algorithm is designed by using the two-dimensional integer chromosome coding. The example shows that the Integrated Strategy can greatly reduce the total time of container ships in port and customer dissatisfaction, which is superior to the Separate Strategy, thus verifying the effectiveness of the integrated strategy.
{"title":"A Berth Allocation Method for Container Terminal with Indented Berths and Marginal Berths","authors":"Zhang Yanwei, Wang Yingchun, Cai Mengdie","doi":"10.1109/ICACMVE.2019.00064","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00064","url":null,"abstract":"Aiming at the berth allocation problem of mixed berth layout with both Indented Berths and Marginal Berths, a Mixed Integer Programming Model is constructed to minimize the total ship arrival time and customer dissatisfaction. Then, the Separate Strategy in which Indented Berths serve only large container ships and Marginal Berths serve only small container ships is introduced, and the Integrated Strategy of Indented Berths and Marginal Berths serving both large and small container ships is proposed as well. To solve the model, a Genetic Algorithm is designed by using the two-dimensional integer chromosome coding. The example shows that the Integrated Strategy can greatly reduce the total time of container ships in port and customer dissatisfaction, which is superior to the Separate Strategy, thus verifying the effectiveness of the integrated strategy.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132736026","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00067
Peng Zhang, J. Xiong, Long Huang
A new algorithm is presented to compute geodesic on B-spline surfaces. At first, the principle of the algorithm is introduced in detail. The geodesic on the surface is traced in a simple way with a starting point and a starting direction as initial values. Then, three examples are delivered to test accuracy and efficiency of our algorithm. Experimental results indicate that the accuracy of our algorithm is comparable with that of Beck's approach, and at the same time our algorithm is faster than it. Furthermore, we do not need to solve the differential equations of geodesic which are quite complicated for B-spline surfaces.
{"title":"An Efficient Method for Computation of Geodesic on B-Spline Surfaces","authors":"Peng Zhang, J. Xiong, Long Huang","doi":"10.1109/ICACMVE.2019.00067","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00067","url":null,"abstract":"A new algorithm is presented to compute geodesic on B-spline surfaces. At first, the principle of the algorithm is introduced in detail. The geodesic on the surface is traced in a simple way with a starting point and a starting direction as initial values. Then, three examples are delivered to test accuracy and efficiency of our algorithm. Experimental results indicate that the accuracy of our algorithm is comparable with that of Beck's approach, and at the same time our algorithm is faster than it. Furthermore, we do not need to solve the differential equations of geodesic which are quite complicated for B-spline surfaces.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114435116","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00066
Zheng Peng-fei, Liu Qing, Lin Da-jun, An Qi
Applying the principle of rapid prototyping manufacturing process, using the method of slice evaluation of point cloud surface model, a complex surface parts intersection computing algorithm is proposed. The intersection of the surfaces are calibrated with the color attribute, and the 3D point cloud surface model is simplified by dimension reduction using layering and slicing. Binary raster image is used to replace the point cloud data, and the distance computing of the three-dimensional point is converted into a Boolean operation of the color map, which greatly reduces the computational complexity and variability. Through the iterative refinement of the grating grids, the intersection feature points of the surface are obtained step by step. The experimental results of point cloud model depict that the algorithm is effective, simple, stable and reliable, and it is applied to the flattening and nesting, and welding path planning in manufacturing, which further explains the wide adaptability of surface intersection algorithm.
{"title":"An Algorithm for Computing Intersection of Complex Surface Parts and Its Application","authors":"Zheng Peng-fei, Liu Qing, Lin Da-jun, An Qi","doi":"10.1109/ICACMVE.2019.00066","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00066","url":null,"abstract":"Applying the principle of rapid prototyping manufacturing process, using the method of slice evaluation of point cloud surface model, a complex surface parts intersection computing algorithm is proposed. The intersection of the surfaces are calibrated with the color attribute, and the 3D point cloud surface model is simplified by dimension reduction using layering and slicing. Binary raster image is used to replace the point cloud data, and the distance computing of the three-dimensional point is converted into a Boolean operation of the color map, which greatly reduces the computational complexity and variability. Through the iterative refinement of the grating grids, the intersection feature points of the surface are obtained step by step. The experimental results of point cloud model depict that the algorithm is effective, simple, stable and reliable, and it is applied to the flattening and nesting, and welding path planning in manufacturing, which further explains the wide adaptability of surface intersection algorithm.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123418195","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00054
Wang Xin, Wu Buwei, S. Jinghui
Cooperative lifting of multiple crawler cranes is researched. Based on the modeling technology of single crane and double cranes, the multi-closed chain among the lifted object and cranes is analyzed, and the corresponding mathematical model of multi-crane system is established. It is a statically indeterminate problem because there are more than 3 cranes to lift one object. So, deformation condition is introduced to change this problem into a statically determinate problem. The method is proposed to obtain the load of each crane according to deformation condition. By case analysis and comparison of results, this proposed method is verified to have good applicability for mechanics analysis of multi-crane lifting system when the lifted object has strong rigidity.
{"title":"Research on Modeling Method of Cooperative Lifting of Multiple Crawler Cranes","authors":"Wang Xin, Wu Buwei, S. Jinghui","doi":"10.1109/ICACMVE.2019.00054","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00054","url":null,"abstract":"Cooperative lifting of multiple crawler cranes is researched. Based on the modeling technology of single crane and double cranes, the multi-closed chain among the lifted object and cranes is analyzed, and the corresponding mathematical model of multi-crane system is established. It is a statically indeterminate problem because there are more than 3 cranes to lift one object. So, deformation condition is introduced to change this problem into a statically determinate problem. The method is proposed to obtain the load of each crane according to deformation condition. By case analysis and comparison of results, this proposed method is verified to have good applicability for mechanics analysis of multi-crane lifting system when the lifted object has strong rigidity.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"29 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123499743","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00023
L. Jing, Bu Jian
Proton exchange membrane fuel cell is an electrochemical power generation device. Leakage can cause it to degrade or even lead to an explosion. Fuel cell end plate sealing is one of the causes of leakage. In this paper, the hydrogen inlet sealing structure of the end plate is taken as the research object. Then the mechanical contact model of rubber sealing ring is established. Mooney-Rivlin hyperelastic constitutive model and FEM are used to analyse the influence of its initial compression, sealing gas pressure and operating temperatures on sealing performance. The results show that the Von Mises stress and contact stress of the sealing ring are distributed symmetrically. Both of them rise up with the increase of initial compression and sealing gas pressure, but reduce with the increase of the operating temperatures. This study can provide reference for the sealing design of proton exchange membrane fuel cell end plates.
{"title":"Study on Factors Affecting Sealing Performance of Proton Exchange Membrane Fuel Cell End Plate","authors":"L. Jing, Bu Jian","doi":"10.1109/ICACMVE.2019.00023","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00023","url":null,"abstract":"Proton exchange membrane fuel cell is an electrochemical power generation device. Leakage can cause it to degrade or even lead to an explosion. Fuel cell end plate sealing is one of the causes of leakage. In this paper, the hydrogen inlet sealing structure of the end plate is taken as the research object. Then the mechanical contact model of rubber sealing ring is established. Mooney-Rivlin hyperelastic constitutive model and FEM are used to analyse the influence of its initial compression, sealing gas pressure and operating temperatures on sealing performance. The results show that the Von Mises stress and contact stress of the sealing ring are distributed symmetrically. Both of them rise up with the increase of initial compression and sealing gas pressure, but reduce with the increase of the operating temperatures. This study can provide reference for the sealing design of proton exchange membrane fuel cell end plates.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124747345","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}
Pub Date : 2019-05-01DOI: 10.1109/icacmve.2019.00019
Li Anhu, Zhao Zusheng, Xiao Xuekun, Gong Wei
In order to research the method of rapidly drawing mining envelope diagram of hydraulic excavator. In this paper, the excavator is analyzed kinematically and the mining envelope diagram is drawn using Adams, MATLAB Simscape Multibody toolbox and D-H method respectively. Then we present a new method to draw the mining envelope diagram based on D-H method and traversing idea and compare these methods together. This method proposed in this paper greatly improves the efficiency of envelope drawing and provides different ideas and foundations for further research
{"title":"Research on Fast Drawing Method of Excavation Envelope Diagram of Hydraulic Excavator","authors":"Li Anhu, Zhao Zusheng, Xiao Xuekun, Gong Wei","doi":"10.1109/icacmve.2019.00019","DOIUrl":"https://doi.org/10.1109/icacmve.2019.00019","url":null,"abstract":"In order to research the method of rapidly drawing mining envelope diagram of hydraulic excavator. In this paper, the excavator is analyzed kinematically and the mining envelope diagram is drawn using Adams, MATLAB Simscape Multibody toolbox and D-H method respectively. Then we present a new method to draw the mining envelope diagram based on D-H method and traversing idea and compare these methods together. This method proposed in this paper greatly improves the efficiency of envelope drawing and provides different ideas and foundations for further research","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127523257","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}
Pub Date : 2019-05-01DOI: 10.1109/ICACMVE.2019.00079
Zheng Yuxin, Wang Xiang, Xi Ying, Liu Jiangshan
In order to study the dynamic characteristics of RV reducer, a translational-torsional coupled dynamic model of RV reducer is simplified and established with reference to the modeling method of 2K-H planetary gear, Runge-Kutta method is used to solve the nonlinear time-varying equations of the system, and translational micro-displacements and meshing micro-displacements of different components are obtained. The sensitivity analysis of dynamic characteristics of planet carrier to nonlinear factors such as time-varying stiffness, meshing error, meshing clearance and external excitation are studied by finite difference method. It is found that the translational micro-displacement of planet carrier is most sensitive to external excitation, followed by the meshing error, and the sensitivity to other factors is weak.
{"title":"Nonlinear Characteristics Analysis of Translational-Torsional Coupled Dynamic Model of RV Reducer","authors":"Zheng Yuxin, Wang Xiang, Xi Ying, Liu Jiangshan","doi":"10.1109/ICACMVE.2019.00079","DOIUrl":"https://doi.org/10.1109/ICACMVE.2019.00079","url":null,"abstract":"In order to study the dynamic characteristics of RV reducer, a translational-torsional coupled dynamic model of RV reducer is simplified and established with reference to the modeling method of 2K-H planetary gear, Runge-Kutta method is used to solve the nonlinear time-varying equations of the system, and translational micro-displacements and meshing micro-displacements of different components are obtained. The sensitivity analysis of dynamic characteristics of planet carrier to nonlinear factors such as time-varying stiffness, meshing error, meshing clearance and external excitation are studied by finite difference method. It is found that the translational micro-displacement of planet carrier is most sensitive to external excitation, followed by the meshing error, and the sensitivity to other factors is weak.","PeriodicalId":375616,"journal":{"name":"2019 International Conference on Advances in Construction Machinery and Vehicle Engineering (ICACMVE)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129482497","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：