The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Jianmin Yang - One of the best experts on this subject based on the ideXlab platform.
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Numerical and Model Test Investigation on the Motion Characteristic of FDPSO and the Sheltered Riser Vessel
29th International Conference on Ocean Offshore and Arctic Engineering: Volume 1, 2010Co-Authors: Zhiqiang Hu, Gang Chen, Jianmin YangAbstract:FDPSO is a multifunction floating platform, capable of drilling, production, storage and offloading. Sheltered Riser Vessel (SRV) serves as an independent buoyant hull to provide riser tensions, which is situated in the moon pool of FDPSO. Due to the shielding effect of moon pool, the Motion of SRV is very small, so as to meet the requirement of drilling. In order to validate the basic FDPSO and SRV concepts, a model test was conducted in the basin of Ocean Engineering in the State Key Lab of Ocean Engineering in Shanghai Jiao Tong University. The storm tests were carried out in wave extremes of West Africa and white noise wave environments. Potential theory was adopted to calculate the Motion performance of FDPSO system. Frequency domain analysis of the Motion response amplitude operator (RAO) and time domain analysis in the extreme sea condition are both conducted. The comparison between the numerical simulation and model test results shows that the results of RAO and statistical value of response time series in the extreme sea condition are coincident. It is indicate that the method is credible and the concepts of FDPSO and SRV are likely to be feasible in West Africa.Copyright © 2010 by ASME
Li Xing-xin - One of the best experts on this subject based on the ideXlab platform.
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Kinematics Simulation of Mechanism in Virtual Maintenance Prototyping
Computer Simulation, 2006Co-Authors: Li Xing-xinAbstract:Due to the complexity and variety of the Motion Characteristic and the constraint relation between the components,the mechanism becomes one of the difficulties of virtual maintenance prototyping.To alleviate this problem,this paper defines ten types of joints based on the study of the mechanism sorts and the relation between its components,classifies the mechanism according to the construction,and then simulates the kinematics of mechanism based on the connection mode between the components.The methods for adopting constraint relation and script controlling to build kinematics simulation of mechanism were studied in JACK system,their condition,range and the limitation also were analyzed.A method combining script controlling with constraint was presented.At last,they were verified though the shoot simulation of XX breech.
Agim Ramadani - One of the best experts on this subject based on the ideXlab platform.
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ALGORITHM FOR MECHANISMS DESIGN AND ITS APPLICATION AT COPIER-BLADE MECHANISM USING DUAL-VECTOR ALGEBRA IN TOPOLOGICAL SYNTHESIS
2012Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The methodology of mechanisms design takes into consideration Motion specifics, functional, topological and dimensional synthesis. The algorithm presents the methodology for mechanism design using basic kinematics building blocks. In this paper the application of mechanisms design methodology for copier-blade mechanism is analysed using dual-vector algebra. Copier-blade mechanism is combination of Cylindrical Cam-Follower and Six-Bar Dwell Linkage, transforming rotational Motion at input to the translation at output. This mechanism was design selecting the basic kinematic building blocks from database, using the Motion Characteristic Code (MCC) for functional synthesis is uses and the dual-vector algebra for topological synthesis.
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the Motion Characteristic code screw Motion and spatial presentation of five combinations of Motions for basic kinematics blocks at the mechanism design
2011Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The concept of mechanisms design methodology includes the Motion Characteristics, and functional, topological and dimensional synthesis. Functional synthesis selects the basic kinematic building blocks using the Motion Characteristic Code (MCC), while during topological synthesis the basic kinematics building blocks are assembled using dual-vector algebra. From the data base of the basic kinematics building blocks can be determined: types of Motion (Rotation – Rotation, Rotational –Translation, Translation – Translation, Helical – Rotation, Helical – Translation), relation between input-output Motions (Parallel, Perpendicular, Incline) and Motion Characteristics (Linearity and Non-Linearity). In the paper the representatives of five types of the Motions are analysed and for each basic kinematic building block is presented: Motion Characteristic Code, Screw Motion and picture showing the spatial orientation.
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design of lathe blade mechanism with basic kinematics blocks using methodology of dual vector algebra
2010Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The methodology of dual-vector algebra for design of mechanisms was elaborated in this paper. The lathe – blade mechanism was designed using basic kinematics blocks. For all types of kinematics blocks the Characteristic code of screw Motion with respected illustration has been given. Screw Motion using dual-vector algebra in its general presentation includes dual number, direction and position vector of Motion that fulfils topological synthesis during the mechanisms design process. Motion Characteristic code includes Motion, continuity, linearity and direction of kinematics blocks.
Kastriot A Buza - One of the best experts on this subject based on the ideXlab platform.
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ALGORITHM FOR MECHANISMS DESIGN AND ITS APPLICATION AT COPIER-BLADE MECHANISM USING DUAL-VECTOR ALGEBRA IN TOPOLOGICAL SYNTHESIS
2012Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The methodology of mechanisms design takes into consideration Motion specifics, functional, topological and dimensional synthesis. The algorithm presents the methodology for mechanism design using basic kinematics building blocks. In this paper the application of mechanisms design methodology for copier-blade mechanism is analysed using dual-vector algebra. Copier-blade mechanism is combination of Cylindrical Cam-Follower and Six-Bar Dwell Linkage, transforming rotational Motion at input to the translation at output. This mechanism was design selecting the basic kinematic building blocks from database, using the Motion Characteristic Code (MCC) for functional synthesis is uses and the dual-vector algebra for topological synthesis.
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the Motion Characteristic code screw Motion and spatial presentation of five combinations of Motions for basic kinematics blocks at the mechanism design
2011Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The concept of mechanisms design methodology includes the Motion Characteristics, and functional, topological and dimensional synthesis. Functional synthesis selects the basic kinematic building blocks using the Motion Characteristic Code (MCC), while during topological synthesis the basic kinematics building blocks are assembled using dual-vector algebra. From the data base of the basic kinematics building blocks can be determined: types of Motion (Rotation – Rotation, Rotational –Translation, Translation – Translation, Helical – Rotation, Helical – Translation), relation between input-output Motions (Parallel, Perpendicular, Incline) and Motion Characteristics (Linearity and Non-Linearity). In the paper the representatives of five types of the Motions are analysed and for each basic kinematic building block is presented: Motion Characteristic Code, Screw Motion and picture showing the spatial orientation.
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design of lathe blade mechanism with basic kinematics blocks using methodology of dual vector algebra
2010Co-Authors: Kastriot A Buza, Agim RamadaniAbstract:The methodology of dual-vector algebra for design of mechanisms was elaborated in this paper. The lathe – blade mechanism was designed using basic kinematics blocks. For all types of kinematics blocks the Characteristic code of screw Motion with respected illustration has been given. Screw Motion using dual-vector algebra in its general presentation includes dual number, direction and position vector of Motion that fulfils topological synthesis during the mechanisms design process. Motion Characteristic code includes Motion, continuity, linearity and direction of kinematics blocks.
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Motion Characteristic code at the screw Motion for some basic kinematics blocks using dual vector algebra
2008Co-Authors: Kastriot A Buza, Arbnor PajazitiAbstract:In this paper the Motion Characteristic code that complies to functional synthesis during the mechanisms design is elaborated. Motion Characteristic code includes Motion, continuity, linearity and direction of kinematics blocks. Screw Motion using dual-vector algebra in its general presentation includes dual number, direction and position vector of Motion that fulfils topological synthesis during the mechanisms design process. Motion Characteristic code at the screw Motion for a number of basic kinematics blocks are also given in the paper.
Mengchen Pei - One of the best experts on this subject based on the ideXlab platform.
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construction strategy and performance analysis of large scale spherical solar concentrator for the space solar power station
Solar Energy, 2020Co-Authors: Yang Yang, Yiqun Zhang, Guanheng Fan, Mengchen PeiAbstract:Abstract The space solar power station is a gigantic power satellite to provide the earth with continuous energy. The front-end system of space solar power station, solar concentrator, has significant influences on the optical performance. Regarding the proposed orb-shaped membrane energy gathering array scheme, this paper deals with the construction strategy of its large-scale spherical concentrator to reduce the complexity of manufacturing and improve the optical properties. The optical principle of the spherical concentrator is described and the spatial Motion Characteristic is presented. A novel construction strategy for the large-scale concentrator is proposed via partitioning octahedron on the sphere and polygonal partition. This paper evaluates the optical performance of the concentrator constructed by the novel strategy using ray tracing method. Performance parameters such as optical concentration ratio and collection efficiency are obtained. Comparison with the other strategies are also implemented. In addition, influence factors such as the sun's non-parallelism, the tracking precision, the orbital periodic Motion, and the potential blockage effects of microwave transmitting antenna and supporting structure are mathematically discussed and evaluated. The numerical results indicate that the proposed strategy achieves a high collection rate, a small efficiency fluctuation, appropriate energy distribution, and relatively small splicing modules, which is conducive to improve optical performance and decrease difficulty in manufacturing.