3D Aided Design Solution for Integrated Pipe Network of Subway Station

2013 ◽  
Vol 368-370 ◽  
pp. 1438-1442
Author(s):  
Yong Zhang ◽  
Qian Kun Wang ◽  
Chen Bin
Keyword(s):  
Design Process ◽  
Optimization Design ◽  
3D Visualization ◽  
Design Method ◽  
Secondary Development ◽  
Design Solution ◽  
Subway Station ◽  
Pipe Network ◽  
Analysis Technique ◽  
Aided Design

Based on analysis of problems existing in the design process of integrated pip network, the authors put forward the aided design method of converting 2D design drawings to 3D visualization model. Based on the 3D aided design workflow, the solution of 3D aided design is proposed, the kernel contains include: making drawing standard and development of the plug-in, selection and secondary development of 3D platform, report of conflict analysis and optimization design. The key analysis technique is discussed in the end of this paper.

scholarly journals Finocyl Grain Design Using the Genetic Algorithm in Combination with Adaptive Basis Function Construction

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Saeed Mesgari ◽  
Mehrdad Bazazzadeh ◽  
Alireza Mostofizadeh
Keyword(s):  
Genetic Algorithm ◽  
Level Set Method ◽  
Level Set ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Design Method ◽  
Burning Surface ◽  
Aided Design ◽  
Function Construction

This study deals with the application of optimization in Finocyl grain design with ballistic objective functions using a genetic algorithm. The classical sampling method is used for space filling; a level-set method is used for simulating the evaluation of a burning surface of the propellant grain. An algorithm is developed beside the level-set code that prepares the initial grain configuration using a computer-aided design (CAD) to export generated models to the level-set code. The lumped method is used to perform internal ballistic analysis. A meta-model is used to surrogate the level-set method in an optimization design loop. Finally, a case study is done to verify the proposed algorithm. Observed results show that the grain design method reduced the design time significantly, and this algorithm can be used in designing any grain type.

A Secondary Development System on Grader Working Device Oriented to Mechanism Optimization

2011 ◽  
Vol 84-85 ◽  
pp. 115-119
Author(s):  
Rui Mu ◽  
Na Zhao ◽  
Yong Jun Pan
Keyword(s):  
User Interface ◽  
New Product Development ◽  
Optimization Design ◽  
Design Method ◽  
Complex Structure ◽  
Secondary Development ◽  
Development System ◽  
Second Development ◽  
Parametric Programs ◽  
Working Device

Because of the complex structure of grader working device, its optimization is a repeated, continuously improved process. A new model has to be set up before each optimization. In order to solve the problem of repeating modeling and improve the product optimization efficiency, a second development system of working device is established. Parametric driving about working device is realized in term of spatial mechanism. At first, the overall design framework of this second development system was established, then customized user interface was completed based on UG/Open API and parametric programs about the working device system were complied based on UG/Open Grip subsequently. The connection among customized user interface, parametric programs and human-computer interaction was realized by using Visual C++, the integrated second development system design of working device was eventually completed. This second development system could not only provide engineers with a rapid design method to shorten the new product development cycle, but solve the problem of repeating modeling during optimization design as well.

scholarly journals Shape Optimization Design for a Centrifuge Structure with Multi Topological Configurations Based on the B-Spline FCM and GCMMA

2020 ◽  
Vol 10 (2) ◽  
pp. 620
Author(s):  
Xinyao Li ◽  
Liangli He
Keyword(s):  
Shape Optimization ◽  
Optimization Design ◽  
Design Method ◽  
Von Mises Stress ◽  
Design Solution ◽  
Deformation And Failure ◽  
B Spline ◽  
Geotechnical Centrifuge ◽  
Final Configuration ◽  
Deep Groove

The geotechnical centrifuge applied in various geotechnical engineering fields provides physical data for investigating mechanisms of deformation and failure and for validating analytical and numerical methods by simulating and studying the geotechnical problems. The basket, as one of the important components used to place the inspection model of centrifugal test, is designed to withstand complex loads. This paper presents an optimization design method for the basket based on the weighted B-Spline Finite Cell Method (FCM) and the globally-convergent method of moving asymptotes (GCMMA). In order to obtain a superior design solution, four topological configurations, i.e., original single web, porous dual web, open deep groove dual web, and connected closed dual web, are investigated and optimized. The mass is selected as the optimization objective, while key shape parameters and stress are regarded as design variables and the constraint, respectively. By optimization, the final masses of the four configurations are reduced greatly compared with the initial configurations, where the greatest weight loss, in case 4, is 10.6%. This indicates that the weighted B-Spline FCM and GCMMA can be well applied for shape optimization of structure in engineering design. In contrast to the final single web adopted in the traditional basket design in case 1, the final configuration in case 4, i.e., connected closed dual web, has the least mass. The final mass is reduced by 133.38 kg when the centrifuge strength requirement is met. Therefore, the final configuration in case 4, where the maximum von-Mises stress is 398.72MPa and mass is 781.82 kg, is superior to the three other configurations.

A Extended Algorithm for Generation of Fibrous Form in the Emergent Design System

2009 ◽  
Author(s):  
Koichiro Sato ◽  
Yoshiki Ujiie ◽  
Yoshiyuki Matsuoka
Keyword(s):  
Design Process ◽  
Design Method ◽  
Design Solution ◽  
Design System ◽  
Early Design ◽  
Evaluation Indexes ◽  
Form Generation ◽  
System A ◽  
Emergent Design ◽  
Existing Form

In the early design process called conceptual design and basic design, diverse ideas of design must be obtained from global solution search under the constraint of unclear design conditions. It is difficult to apply the conventional engineering design method from the necessity of the setting of the objective function in the early design process. Therefore, in a previous study, the emergent design system, which is applicable from the early design process, has been proposed. In this study, the degree of freedom in an emergent design solution was extended, to form a method with two types of form elements: existing form elements (matrix element) and fiber form elements. To help construct the system, a differentiation phenomenon, which is seen in the morphogenesis of organisms with diverse forms, was introduced into the form generation algorithm in this system, and the relationship between the input parameters and the newly defined evaluation indexes was analyzed.

A Study on Virtual Prototyping Technology for Vacuum Switch

2011 ◽  
Vol 187 ◽  
pp. 528-534 ◽  
Author(s):  
Hua Bin Wen ◽  
Yong Duan Song ◽  
Rui Li
Keyword(s):  
Optimal Design ◽  
Computer Aided Design ◽  
Optimization Design ◽  
Design Method ◽  
Virtual Prototyping ◽  
Vacuum Switch ◽  
Important Research Topic ◽  
Switch Design ◽  
Virtual Prototyping Technology ◽  
Aided Design

The optimal design of vacuum switch is becoming an important research topic with the extensive application and increasing demands of vacuum switches. This paper analyzes the main elements of the vacuum switch design, and gives the design process of the vacuum switch. An optimal design method is proposed for the vacuum switch based on the concept and characteristics of virtual prototyping (VP) technology. By using computer aided design and the related software, we propose a method for vacuum switch modeling VP, the stress field VP of parts, the thermal field VP of electric heat, the electric field VP of insulation parts and the mechanical dynamic VP of kinematics system, which are integrated for optimization design for vacuum switches. This work is expected to provide a new idea for optimal and rapid design of vacuum switches.

Development of an Optimization Design Method for Turbomachinery by Incorporating the Cooperative Coevolution Genetic Algorithm and Adaptive Approximate Model

2011 ◽  
Author(s):  
Peng Song ◽  
Jinju Sun ◽  
Ke Wang ◽  
Zhilong He
Keyword(s):  
Optimal Design ◽  
Objective Function ◽  
Optimization Algorithm ◽  
Optimization Design ◽  
Design Method ◽  
Mathematical Optimization ◽  
Cryogenic Liquid ◽  
Design Solution ◽  
Cooperative Coevolution ◽  
The Real

An optimization design method is developed, which is motivated by the optimal design of a cryogenic liquid turbine (including an asymmetric volute, variable stager vane nozzles, shroud impeller and diffuser) for replacement of the Joule-Thompson throttling valve in the internal compression air-separation unit. The method involves mainly three elements: geometric parameterization, prediction of objective function, and mathematical optimization algorithm. Traditional parameterization approach is used for the geometry representation, while some novel work in the latter two aspects (i.e. objective function evaluation and optimization algorithm) is done to reduce the computing time and improve the optimization solution. A modified Cooperative Coevolution Genetic Algorithms (CCGA) is developed by incorporating a modified variable classification algorithm and some new self-adapted GA operators, which help to enhance the global search ability with an excessive number of optimization variables. Design of Experiment (DOE) is carried out to initialize the kriging approximation model, which is used to approximate the time-costly objective function. Then the CCGA is started, and once a potential superior individual is found, a decision will be made by the in-house code on whether or not it needs a updating. If required, the true objective function prediction based on the real model will be conducted and the obtained value of objective function will be used to update the kriging model. In such a way, the CCGA can complete its optimal searching with a limited number of real evaluations for objective function. All the above features are integrated into the optimization framework and encoded for the optimal turbine design. In addition, CFD software ANSYS CFX is used for the real objective function evaluations, and a well-organized batch code is developed by the authors for calling the CFD simulation which helps to promote this automation of the optimization process. For validation, the optimization method is used to solve some classical mathematical optimization problems and its effectiveness is demonstrated. The method is then used in the optimal design of the cryogenic liquid turbine stage, it is demonstrated that the optimal design method can help to reduce significantly the searching time for the optimal design and improve the design solution to the liquid turbine.

Modular Design on Basic Parameters of Volume Reducer

2011 ◽  
Vol 86 ◽  
pp. 633-636
Author(s):  
Tie Wang ◽  
Jun Shen ◽  
Fu Qiang Zhao
Keyword(s):  
Design Process ◽  
Optimization Design ◽  
Modular Design ◽  
Design Method ◽  
Low Cost ◽  
High Volume ◽  
Basic Parameters ◽  
Programming Software ◽  
Access Database ◽  
Mechanical Optimization

In order to meet high-volume, low-cost reducer and ensuring quality in the production of reducer, a new design method is necessary. This paper applies the design method of ‘modular’ in high-volume reducer production, preferred numbers and mechanical optimization design thought, then based on access database and VB programming software research modular design process of the volume reducer. Higher degree basic modular parameters of volume reducer are obtained.

scholarly journals E-LEARNING AND GROUPS‐ORIENTED E‐TRAINING, A REPORT OF EXPERIENCE

2006 ◽  
Vol 12 (3) ◽  
pp. 246-252
Author(s):  
Fritz-Jürgen Schwarzat
Keyword(s):  
Design Process ◽  
Computer Aided Design ◽  
Video Sequence ◽  
Steel Structure ◽  
Design Solution ◽  
Course Of Action ◽  
E Learning ◽  
The Subject ◽  
Aided Design ◽  
Support Facility

This contribution reports on experience of media‐supported tutoring in the subject “CAD in steel construction”. A better understanding of the procedures within the design process is reached by using methodologically prepared and media‐supported design solutions. Special attention is paid to the actions involved in e‐training. The calculation and design of a simple steel structure is given as an example. An interactive design‐making support facility offers a structural knowledge base for the respective case. When deciding on a particular design solution, a video sequence of the necessary course of action will be offered in the computer‐aided design process.

Parametric Design Study of the Nonstandard Serialized Assembly

2013 ◽  
Vol 385-386 ◽  
pp. 1879-1882
Author(s):  
Feng Xu ◽  
Wei He ◽  
Nian Fu Xu
Keyword(s):  
Software Development ◽  
Programming Language ◽  
Design Process ◽  
Parametric Design ◽  
Design Method ◽  
Secondary Development ◽  
Assembly Design ◽  
C Programming Language ◽  
C Programming ◽  
3D Software

The parametric design method and software development of nonstandard serialized assembly components based on Pro/Engineer 3D software platform are introduced. The parametric assembly design process is done by the usage of Pro/Toolkit secondary development kit and C programming language. An intermittent star-wheel assembly is presented as an example. The design accuracy and productivity of non-standard serialized assembly components can be significantly increased by adapting this method.

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