scholarly journals Path Planning Analysis of Decelerator Assembly Based on Virtual Technology

2015 ◽  
Vol 11 (4) ◽  
pp. 30
Author(s):  
Xiangyang Jin ◽  
Yiming Sun
Keyword(s):  
Design Method ◽  
Structural Characteristics ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Virtual Technology ◽  
Assembly Simulation ◽  
Development Cycle ◽  
Assembly Technology ◽  
The Cost ◽  
Hierarchical Relation

Aiming at the structural characteristics of different parts of decelerator, the general rules of 3D part modeling was summarized, three-dimensional model of gear bracket was established, all marshaled parts were generated into the whole parts assembly, added a variety of assembly relation and hierarchical relation to the parts. Then the reducer assembly path was sketched out, assembly sequence of parts was determinated, the final completion of assembly simulation was finished. Virtual assembly technology is conducive to the rapid introduction of technology of advanced design method, improve product quality, reduce the cost of development, and shorten the development cycle, which lays the foundation of practical disassembly and assembly parts.

The Design of Optomechanical for Bear Severe Mechanics Environment

2013 ◽  
Vol 552 ◽  
pp. 52-56
Author(s):  
Hong Tao Yang ◽  
Zhe Yuan Fan ◽  
Wei Ning Chen ◽  
Zhao Hui Zhang ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Optical System ◽  
Design Theory ◽  
Design Method ◽  
Three Dimensional ◽  
Ansys Software ◽  
Three Dimensional Model ◽  
Rubber Bearing ◽  
Environment Adaptation ◽  
Assembly Technology

Optical lenses act as the important methods for acquire the image information is applied increasingly board ,In accordance with the application environment that require content the precision and the force environment adaptation yet more power, so it is necessary that research on the adaption ability to the big level vibration and shock. In order to stand the bitter force environment put to use the centering assembly technology to ensure the image quality of the optical system. Design the different damping coefficient rubber-bearing isolation that assimilate the big level shock energy. At first, by the Pro/e software establish the three-dimensional model and use the ANSYS software simulate and analysis the result of the design. We want to apple the Sigfit software to simulate the effect that the vibration and shock affect on the MTF of the optical system. After optimize the design theory so as to attain the optimized result. By the experiment test the lenses about the accommodate ability, the result which can meet the shock of5000g.and 20g random vibration, camera can work effectively. This kind of design technology is mature and reliable and live through the examination under all kinds of environment, this design method is provided the reference for the design and development of optical mechanism production.

Numerical Simulation and Optimization on Casting Hoisting Sheave

2011 ◽  
Vol 225-226 ◽  
pp. 92-96
Author(s):  
Guo Fa Mi ◽  
Li Lin Chen ◽  
Hong Yan Nan ◽  
Hai Yan Wang
Keyword(s):  
Design Method ◽  
Hot Spot ◽  
Structural Characteristics ◽  
Three Dimensional ◽  
Solidification Process ◽  
Casting Process ◽  
Three Dimensional Model ◽  
Simulation And Optimization ◽  
Thick Part ◽  
Cold Iron

The design of the casting process was obtained by traditional casting design method. The process was composed of the choice of the casting position and the determination of casting parameters and the design of the gating system. According to the structural characteristics of sheave and quality requirements, the sheave hub and rim were poured separately. In order to achieve progressive solidification, two insulated risers were laid on the top of the wheel, and some risers were placed on the top of the hot spot in the rim and cold iron was introduced near by the thick part of the wheel hub. Three-dimensional model of the casting was generated and the solidification process of the sheave was simulated by View Cast. The results showed that the hot spot areas in the rim and thick part of the wheel hub have frozen finally, and the shrinkage formed in those areas. According to the simulation results and analysis, the casting process program was optimized by increasing the size of riser and the thickness of cold iron. After simulated once again, the defects were transferred to risers. The defects were eliminated to the greatest extent and the progressive solidification was achieved. So the reasonable program of the casting process was obtained.

scholarly journals Research on Parametric Design of Hydraulic Retarder Based on Multi-Field Coupling of Heat, Fluid and Solid

2015 ◽  
Vol 9 (1) ◽  
pp. 58-64 ◽  
Author(s):  
Kuiyang Wang ◽  
Jinhua Tang ◽  
Guoqing Li
Keyword(s):  
Numerical Simulation ◽  
Parametric Design ◽  
Design Method ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Field Coupling ◽  
Sequential Coupling ◽  
Fluid Coupling ◽  
Hydraulic Retarder

In order to optimize the design method and improve the performance of hydraulic retarder, the numerical simulation of multi-field coupling of heat, fluid and solid is carried out to hydraulic retarder, based on the numerical computation and algorithm of heat-fluid coupling and fluid-solid coupling. The computation models of heat-fluid coupling and fluid-solid coupling of hydraulic retarder are created. The three dimensional model of hydraulic retarder is established based on CATIA software, and the whole flow passage model of hydraulic retarder is extracted on the basis of the three dimensional model established. Based on the CFD calculation and the finite element numerical simulation, the temperature field, stress field, deformation and stress state are analysised to hydraulic retarder in the state of whole filling when the rotate speed is 1600 r/min. In consideration of rotating centrifugal force, thermal stress and air exciting vibration force of blade surface, by using the sequential coupling method, the flow field characteristics of hydraulic retarder and dynamic characteristics of blade structure are analysised and researched based on multi-field coupling of heat, fluid and solid. These provide the theoretical foundation and references for parametric design of hydraulic retarder.

Parametric Design of Tractor Configuration Using API Based on CATIA

2010 ◽  
Vol 455 ◽  
pp. 411-416
Author(s):  
Ji Shun Li ◽  
L.H. Chen ◽  
L. Li
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Three Dimensional ◽  
Parametric Representation ◽  
Material Object ◽  
Chain Reactions ◽  
Development Cycle ◽  
Cad Cam ◽  
Key Issues ◽  
Small Change

The traditional shape design method of tractor is mainly completed based on the manual design. Messages are transmited mainly through material object, model, blueprint and template. The material object and model even have a small change that will cause massive chain-reactions such as tedious blueprint revision. And there will be a great many of problem, such as the development cycle of tractor to be long, the accumulative error of design to be big, the development cost to be high and product universalization and serialized degree to be low. This problem is key problem to be solved for shape designer. Advanced design method such as CAD/CAM provid solutions for us, and especially the concept of parametric design was applied. In this paper an appfoach for the parametric design of tractor configuration will be presented. To this end, there are two key issues to be solved: First, the parametric representation of the tractor configuration, second，how to generate a three—dimesional shape of the tractor automatically based on the parametric representation. The parametric design of the tractor configuration is implemented by making use of the API technique of the CAD software，namely automation in CATIA．The test example shows that the approach presented is able to generate a three dimensional shape of the tractor automatically and meet the need of the parametric design of tractor configuration.

Research on Fatigue Life of the Casting Crane’s Girder

2011 ◽  
Vol 295-297 ◽  
pp. 598-602
Author(s):  
Zhi Cheng Huang
Keyword(s):  
Fatigue Life ◽  
Fracture Mechanics ◽  
Design Method ◽  
Three Dimensional ◽  
Data Access ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Safe Operation

Taken a certain type of casting crane’s girder as research object, established its three-dimensional model by using Pro/ENGINEER software, and then import it into the ANSYS program for analysis with ANSYS data access module (DDA), integrating the analysis results and the theory of fracture mechanics, the thesis comprehensively analyzed the fatigue life of the casting crane’s girder with damnification-limit design method. It provided some theory basis and reference for casting crane’s safe operation and fatigue lift design.

Optimization Design of Hydraulic Cylinder Based on ANSYS

2012 ◽  
Vol 562-564 ◽  
pp. 709-712
Author(s):  
Yi Lun Han ◽  
Li Jun Huang ◽  
Xue Lei Wen
Keyword(s):  
Optimization Design ◽  
Three Dimensional ◽  
Basic Structure ◽  
Hydraulic Cylinder ◽  
Stress And Strain ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
The Cost

The basic structure of the piston hydraulic cylinder was introduced. A three-dimensional model was carried out for the hydraulic cylinder by using Pro/E soft，the finite element analysis to the largest hydraulic condition while hydraulic cylinder working by using ANSYS soft，and the distribution of the stress and strain of hydraulic cylinder was derived from it. It optimized the structure of hydraulic cylinder effectively and the cost was saved.

scholarly journals Noncontact restoration of missing parts of stone Buddha statue based on three-dimensional virtual modeling and assembly simulation

2020 ◽  
Author(s):  
Young Hoon Jo ◽  
Seonghyuk Hong ◽  
Seong Yeon Jo ◽  
Yoon Mi Kwon
Keyword(s):  
3D Printing ◽  
Reference Model ◽  
Three Dimensional ◽  
Contact Method ◽  
Cultural Artifacts ◽  
Three Dimensional Model ◽  
Analog Simulation ◽  
Interface Surface ◽  
Assembly Simulation ◽  
The Right

Abstract Three-dimensional (3D) digital technology is one of the most essential conservation methods that complements the traditional technique of the restoration of cultural artifacts. In this study, 3D scanning, virtual restoration modeling, and 3D printing were used as a non-contact approach for the restoration of a damaged stone seated Bodhisattva (stone Buddha statue). First, a three-dimensional model with an average point density of 0.2 mm was created by integrating the fixed high-precision scanning of the exterior and the handheld mid-precision scanning of the interior excavated hole. Through a 3D deterioration map of the stone Buddha statue, the area of the missing parts was measured as 400.1 cm 2 (5.5% of the total area). Moreover, 257.1 cm 2 (64.2% of the missing part area) of four parts such as the head, the surrounding area of the Baekho, the right ear, and the right eye, for which symmetry was applicable for modeling or there could be ascertainable historical evidence for the total missing parts, was selected for restoration. The virtual restoration of the missing parts of the stone Buddha statue was performed using a haptic modeling system in the following order. First, the location of the three fragments detached from the head was determined. Next, the reference model was selected, and its symmetrization and modification with respect to the original were conducted. Also, estimation modeling and outer shape description were performed through historical research and consultation with experts. The created virtual-restoration model’s (461 cm 3 ) heuristic-based assembly suitability was verified by design mock-up printing and digital–analog simulation. In particular, to address the assembly interference, the interface surface was modified and reprocessed several times. Accordingly, the final design mock-up’s volume size was decreased by 5.2% (437 cm 3 ). Photopolymerization 3D printing technology was used for the actual restoration of the stone Buddha statue and the layer thickness of the material used was set as 0.10 mm considering the surface roughness. Finally, the surface of the printed output was colored to prevent yellowing and joined to the missing part of the stone Buddha statue. This study presents a great case to shift from the traditional manual-contact method to the contactless digital method for the restoration of artifacts and is expected to largely contribute to increasing the usability of digital technologies in the restoration of cultural artifacts.

scholarly journals Performance Optimization of High Specific Speed Centrifugal Pump Based on Orthogonal Experiment Design Method

Processes ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 728 ◽  
Author(s):  
Li ◽  
Ding ◽  
Shen ◽  
Jiang
Keyword(s):  
Centrifugal Pump ◽  
Performance Optimization ◽  
Design Method ◽  
Orthogonal Experiment ◽  
Three Dimensional ◽  
Experiment Design ◽  
Three Dimensional Model ◽  
Pump Design ◽  
Orthogonal Experiment Design ◽  
Specific Speed

A high specific speed centrifugal pump is used in the situation of large flow and low head. Centrifugal pump parameters need to be optimized in order to raise its head and efficiency under off-design conditions. In this study, the orthogonal experiment design method is adopted to optimize the performance of centrifugal pump basing on three parameters, namely, blade outlet width b2, blade outlet angle β2 and blade wrap angle φ. First, the three-dimensional model of the centrifugal pump is established by CFturbo and SolidWorks. Then nine different schemes are designed by using orthogonal table, and numerical simulation is carried out in CFX15.0. The final optimized combination of parameters is b2 = 24 mm, β2 = 24°, φ = 112°. Under the design condition, the head and efficiency of the optimized centrifugal pump are appropriately improved, the increments of which are 0.74 m and 0.48%, respectively. However, the efficiency considerably increases at high flow rates, with an increase of 6.9% at 1.5 Qd. The anti-cavitation performance of the optimized centrifugal pump is also better than the original pump. The results in this paper can provide references for parameter selection (b2, β2, φ) in the centrifugal pump design.

Design of noncircular bevel gear with concave pitch curve

2012 ◽  
Vol 227 (3) ◽  
pp. 542-553 ◽  
Author(s):  
Kan Shi ◽  
Jiqiang Xia ◽  
Chunjie Wang
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Bevel Gear ◽  
Polar Coordinate System ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Profile Equation ◽  
Variable Transmission ◽  
Polar Coordinate ◽  
Pitch Curve

Noncircular bevel gear can achieve variable transmission between intersecting axes. This article proposes the design method of high-order noncircular bevel gear with concave pitch curve. The parametric equations for driving and driven gear, addendum and dedendum surface under given transmission ratio and axis angle are established in a spherical polar coordinate system. The tooth profile equation of noncircular bevel gear is derived according to the generation method by using bevel gear cutter. The three-dimensional model for noncircular bevel gear is developed to verify the correctness of the design method.

Research on the Virtual Assembly-Disassembly and Electrical Control Process of AC Contactor Based on 3DVIA Composer

2013 ◽  
Vol 325-326 ◽  
pp. 1140-1144
Author(s):  
Wei Gang Deng ◽  
Hai Jun Li
Keyword(s):  
Design Method ◽  
Three Dimensional ◽  
Control Process ◽  
Virtual Simulation ◽  
Simulation Platform ◽  
Technical Documentation ◽  
Three Dimensional Model ◽  
Program Code ◽  
Electrical Control ◽  
Production Practice

The article made a research on the CJT1-10 AC Contactor, established its three-dimensional model in SolidWorks software, using Bottom-Up and Top-Down design method, and virtually simulated the assembly, disassembly and electrical control process in 3DVIA Composer software. A dedicated virtual simulation platform for AC Contactor was developed, and the simulation process was controlled individually by the program code. The virtual simulation platform effectively reproduced the assembly-disassembly and electrical control process of AC Contactor, which provided a good technical documentation for the production practice and teaching application.

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