The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Yan-hua Chen - One of the best experts on this subject based on the ideXlab platform.
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Analysis on Thermal Mechanical Coupling of Buried Thermal Pipeline Based on ADINA
Advanced Materials Research, 2013Co-Authors: Mei Yang, Yan-hua ChenAbstract:High temperature medium in the thermal pipeline will affect distortion and stress distribution of the pipe wall, so its very important to analyze the thermal mechanical coupling in thermal pipeline. Numerical simulation of buried thermal pipeline damage under the earthquake action is carried by finite element method-ADINA. Three-dimensional finite element modeling considered site condition is investigated; geometry model is constructed with native and Parasolid method in ADINA. Gravity and earthquake force are defined in structure model, and temperature load in thermal model. According to the results of thermal mechanical coupling, the damage of buried thermal pipeline is analyzed. Influence of single temperature load on the stress and strain of buried thermal pipeline is very small, but the stress and circumferential strain increase rapidly under earthquake action. Also, the axial strain is very complex. The temperature load mainly affects axial strain under gravity and earthquake load; the increasing temperature enables to reduce axial strain, which makes axial destruction reduced. Finally, some advice is proposed.
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Finite Element Analysis of Crack Propagation and Casing Failure Process under Thermal Mechanical Coupling
Advanced Materials Research, 2011Co-Authors: Shou Kang Hu, Yan-hua ChenAbstract:Because the temperature of heat medium in thermal recovery wells is very high, and casing is heated during steam injection process, which has become the main reason of casing failure. Therefore, it is very important to analyze crack propagation and casing failure under thermal mechanical coupling. Three-dimensional finite element model is investigated; geometry model is constructed with native and Parasolid method in ADINA. The casing is modeled by native method and strata are modeled by Parasolid method, casing are subtracted and merged with strata by Boolean Operation. Gravity and displacement loads are defined in structure model, and temperature load in thermal model. In structural model, casing is treated as thermoplastic material, and strata are treated as hot isotropic material. In thermal model, all materials are treated as heat conduction material. Thermal-mechanical coupling is calculated with the thermo-mechanical coupled analysis solver in ADINA, and casing damage process is calculated. According to the calculating results, the mechanism of casing damage is analyzed.
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Application of ADINA to modeling of fluid-structure interaction in buried liquid-conveying pipeline
2009 2nd International Conference on Information and Computing Science ICIC 2009, 2009Co-Authors: Yan-hua Chen, You Po SuAbstract:Finite element modeling of buried liquid-conveying pipeline for the calculation of fluid structure interaction is the key to analyze the damage of long distance buried liquid-conveying pipeline. Because the influence of site, fault movement, and earthquake, etc. it is necessary to calculate fluid-structure interaction (FSI) in finite element analysis under pipe-soil interaction. Finite element model of buried liquid-conveying pipeline for the calculation of fluid structure interaction is constructed through combination of ADINA-Parasolid and ADINA-native modeling methods, and the direct computing method of two-way fluid-structure coupling is introduced. Pipe-soil friction is defined in solid model, special flow assumption and fluid structure interface condition are defined in fluid model. Damage of buried liquid-conveying pipeline is investigated through computing of fluid-structure coupling. Results are analyzed, and some advice is proposed.
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Finite element analysis of fluid-structure interaction in buried liquid-conveying pipeline
Journal of Central South University of Technology (English Edition), 2008Co-Authors: Qing Jie Zhu, Ting Quan Liu, Yan-hua Chen, Zhao Li DaiAbstract:Long distance buried liquid-conveying pipeline is inevitable to cross faults and under earthquake action, it is necessary to calculate fluid-structure interaction(FSI) in finite element analysis under pipe-soil interaction. Under multi-action of site, fault movement and earthquake, finite element model of buried liquid-conveying pipeline for the calculation of fluid structure interaction was constructed through combinative application of ADINA-Parasolid and ADINA-native modeling methods, and the direct computing method of two-way fluid-structure coupling was introduced. The methods of solid and fluid modeling were analyzed, pipe-soil friction was defined in solid model, and special flow assumption and fluid structure interface condition were defined in fluid model. Earthquake load, gravity and displacement of fault movement were applied, also model preferences. Finite element research on the damage of buried liquid-conveying pipeline was carried out through computing fluid-structure coupling. The influences of pipe-soil friction coefficient, fault-pipe angle, and liquid density on axial stress of pipeline were analyzed, and optimum parameters were proposed for the protection of buried liquid-conveying pipeline.
Zhang Qing-gong - One of the best experts on this subject based on the ideXlab platform.
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Kinematics Simulation of Air Compressor Operating Mechanism Based on CAXA and ADAMS
Mie of China, 2020Co-Authors: Zhang Qing-gongAbstract:Based on the analysis of the structure of W2.85 Air Compressor operating mechanism, it builds the 3D model and virtual assembly of this product in CAXA. Importing the assembly file of operating mechanism in CAXA to ADAMS with Parasolid transmission standard, it simulates the kinematics of operating mechanism of piston type air compressor.
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Three-dimension Modeling and Kinematics Simulation of Eccentric Piston Pump
Coal Mine Machinery, 2020Co-Authors: Zhang Qing-gongAbstract:Based on the analysis of the kinematic diagram of mechanism concerning the eccentric piston pump,the three-dimension model of the eccentric piston pump was established by CAXA solid design software.The assembly file of the eccentric piston pump in CAXA was imported to ADAMS by Parasolid transmission standard.The kinematics simulation of the virtual prototype on the eccentric piston pump was realized.
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Kinematics Simulation of Crankshaft-link-piston Mechanism on W2.85 Type Air Compressor
Coal Mine Machinery, 2020Co-Authors: Zhang Qing-gongAbstract:Based on a structure analysis of the crankshaft-link-piston mechanism on W2.85 air compressor,the 3-dimension model and virtual assembly of the crankshaft-link-piston mechanism were done by CAXA solid design software.The assembly file of the crankshaft-link-piston mechanism in CAXA was imported to ADAMS by Parasolid transmission standard.The kinematics simulation of the crankshaft-link-piston mechanism on W2.85 type air compressor was realized.
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Virtual Design and Simulation to Type of W2.85 Piston Air Compressor Research
Coal Mine Machinery, 2020Co-Authors: Zhang Qing-gongAbstract:The design of the virtual prototyping frame construction,the work flow and its method of the realization on the air compressor are expounded.Based on the analysis of the structure of W2.85 air compressor operating mechanism,the 3-dimension model and virtual assembly of this product were done by CAXA solid design software.The assembly file of operating mechanism in CAXA was imported to ADAMS by Parasolid transmission standard,kinematics simulation of operating mechanism of piston type air compressor was realized.
Xijun Chen - One of the best experts on this subject based on the ideXlab platform.
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Optimum Design and Simulation of a Mobile Robot with Standing-up Devices to Assist Elderly People and Paraplegic Patients
2006 IEEE International Conference on Robotics and Biomimetics, 2006Co-Authors: Guangming Xiong, Jianwei Gong, Tao Zhao, Xijun ChenAbstract:An assistant robot with standing-up devices (ARSD) is developed to provide the functions of standing-up from chair and moving for elderly people and paraplegic patients. Virtual prototype technology is employed to make the design and development of the robot more efficient and reliable. And, the co-simulation design method is presented. In order to run a 3D simulation, the model of the robot is built by SolidWorks and is imported to ADAMS through Parasolid pipe. A multi-objective genetic algorithm based on neural network response surface is used to find the Pareto-optimal solutions in the optimum design of ARSD. In order to find the required answer in the Pareto set, a multi-objective fuzzy decision method is presented also. Finally, the mode of human-robot interactive control is discussed.
Guangming Xiong - One of the best experts on this subject based on the ideXlab platform.
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Development ofAssistant RobotwithStanding-up Devices forParaplegicPatients and ElderlyPeople
2020Co-Authors: Guangming Xiong, Jianwei Gong, Taisen ZhuangAbstract:An assistant robotwith standing-up devices(ARSD) wasdeveloped according tothedemandsof paraplegic patients andelderly people. Therobotcanassist disabled persons during thesit-to-stand transfer andcanalso carrying themtomove.Inordertomakethedesign and development oftherobotmoreefficient andreliable, virtual prototype technology wasemployed. Themodeloftherobotis builtby SolidWorks andisimported toADAMS through Parasolid pipe. An algorithm basedonneural network speed control waspresented toimplement pathfollowing fortherobot. Furthermore, aco-simulation wasperformed using ADAMS and MATLAB tovalidate thecontrol strategy. I INTRODUCTION
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Optimum Design and Simulation of a Mobile Robot with Standing-up Devices to Assist Elderly People and Paraplegic Patients
2006 IEEE International Conference on Robotics and Biomimetics, 2006Co-Authors: Guangming Xiong, Jianwei Gong, Tao Zhao, Xijun ChenAbstract:An assistant robot with standing-up devices (ARSD) is developed to provide the functions of standing-up from chair and moving for elderly people and paraplegic patients. Virtual prototype technology is employed to make the design and development of the robot more efficient and reliable. And, the co-simulation design method is presented. In order to run a 3D simulation, the model of the robot is built by SolidWorks and is imported to ADAMS through Parasolid pipe. A multi-objective genetic algorithm based on neural network response surface is used to find the Pareto-optimal solutions in the optimum design of ARSD. In order to find the required answer in the Pareto set, a multi-objective fuzzy decision method is presented also. Finally, the mode of human-robot interactive control is discussed.
Wang Chuan - One of the best experts on this subject based on the ideXlab platform.
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The design and simulation analysis of virtual prototype of reducer based on UG and ADAMS
Modern Machinery, 2020Co-Authors: Wang ChuanAbstract:In order to improve the efficiency of designing gear reducer,using the method of parametric design and virtual prototype based on 3d design software UG and ADAMS.Build parametric models of components of gear and complete virtual assembly of reducer in UG.And imports the data of assembly model of reducer to ADAMS software by Parasolid format,add into various constraints,enter basical parameters,establishe prototype of reducer.analysis motion simulation of virtual prototyping model of virtual prototype gear reducer,verify the shaft transmission speed and gear mesh,compare and analysis the results of test and theoretical calculation,complies with the data,prove the correction of virtual prototyping model,and the simulation has credibility.
