A Computer Oriented Mechanical Design System

1965 ◽  
Author(s):  
L. F. Knappe
Keyword(s):  
Mechanical Design ◽  
Design System

“IRIS” A Computerized High Head Pump Turbine Design System

1977 ◽  
Vol 99 (3) ◽  
pp. 567-577
Author(s):  
S. Chacour ◽  
J. E. Graybill
Keyword(s):  
Mechanical Design ◽  
Design Parameters ◽  
Design System ◽  
Performance Requirements ◽  
Manufacturing Process Planning ◽  
Depth Analysis ◽  
High Head ◽  
Critical Components ◽  
Limited Input Data ◽  
Turbine Design

“IRIS” is a computerized design and structural optimization system capable of generating all the major hydraulic and mechanical design parameters of high head pump/turbines from limited input data. The program will size the unit and select the proper hydraulic passage configuration according to performance requirements and optimize the dimensions of all the major components, generate command tapes used by a numerically controlled flame cutter, estimate cost, and issue manufacturing process planning. It also generates finite element models for the “in depth” analysis of critical components.

A Cooperative-Collaborative Design System for Multi-Disciplinary Mechanical Design

2005 ◽  
Author(s):  
Zhiqiang Chen ◽  
Zahed Siddique
Keyword(s):  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
Process Model ◽  
Mechanical Design ◽  
System Level ◽  
Design System ◽  
Design Collaboration ◽  
Design Activities ◽  
Design Process Model

The emergence of computer and network technology has provided opportunities for researchers to construct and build systems to support dynamic, real-time, and collaborative engineering design in a concurrent manner. This paper provides an understanding of the product design in a distributed environment where designers are in different geographic locations and are required to be involved in the design process to ensure successful product design. A design process model that captures the major interactions among stakeholders is presented, based on the observation of cooperation and collaboration. The stakeholders’ interactions are divided into activity and system level to distinguish the interactions in group design activities and design perspective evolution. An initial computer implementation of the design model is presented. The design system consists of a set of tools associated with design and a management system to facilitate distributed designers to support various design activities, especially conceptual design. Our research emphasis of design collaboration in this paper is: (i) Model a Cooperative-collaborative design process; (ii) Support synchronized design activities; and (iii) Structure the complex relations of various design perspectives from engineering disciplines.

A Precise Full-Dimensional Design System for Multistage Steam Turbines: Part I — Philosophy and Architecture of the System

2007 ◽  
Author(s):  
Hongde Jiang ◽  
Kepeng Xu ◽  
Baoqing Li ◽  
Xinzhong Xu ◽  
Qing Chen
Keyword(s):  
Steam Turbine ◽  
Mechanical Design ◽  
Local Level ◽  
Mechanical Analysis ◽  
Design System ◽  
Steam Turbines ◽  
Aerodynamic Design ◽  
3D Design ◽  
Design And Optimization ◽  
Design Consistency

A new, precise full-dimensional (PFD) design system for multistage steam turbine has been developed in the past decades by the present authors. The remarkable features of PFD system different from conventional 3D design methodology are as followings: a). Taking into account of unsteady aerodynamic impact on steam turbine performance, b). Simulating 3D real structure of blade and non-blade components without geometric simplification, c). Coupling of aerodynamic design with FEM structure- mechanical analysis for blade and non-blade components. Three levels of design and optimization at global, regional and local level for steam turbine cycle and flow path design are described. The PFD design system consists of conceptual (0D), 1D, Q3D, F3D/4D aerodynamic design and optimization codes, structure analysis and mechanical design (MD) tools, and pre- and post-processing software. In this part of present paper a detail description of philosophy and architecture of the PFD design system, function of each design tools, principles for design consistency are given. The PFD design system is a new plateau of present author’s long-term effort to bring multistage steam turbine design from a simple, passive, empirical-based situation toward a comprehensive, active, knowledge-based environment.

A Precise Full-Dimensional Design System for Multistage Steam Turbines: Part II — Key Technologies for Blade and Non-Blade Components, Engineering Application and Updating

2007 ◽  
Author(s):  
Xinzhong Xu ◽  
Kepeng Xu ◽  
Baoqing Li ◽  
Qing Chen ◽  
Hongde Jiang
Keyword(s):  
Power Plants ◽  
Performance Test ◽  
Mechanical Design ◽  
Design Method ◽  
Engineering Application ◽  
Control Valve ◽  
Fem Analysis ◽  
Design System ◽  
Steam Turbines ◽  
Key Technologies

In this part of present paper the key technologies for steam turbine blade and non-blade components developed by using the precise, full-dimensional (PFD) system is described firstly. For blade components advanced aerodynamic concept and design method for customized after-loaded profile, compound-lean blade, tandem cascade, contoured endwall, and solid particle erosion protection for HP and IP first nozzle have been developed. For non-blade component including main steam inlet/control valve, LP exhaust hood, packing seal and cavity flow, casing opening and condenser, new aerodynamic and mechanical design has been developed. New blade and non-blade components were experimentally and numerically investigated to verify its performance. Finite element method (FEM) analysis for all key components is also illustrated in this paper. Secondly the approach of validation and updating for the PFD system is introduced. Based on a large amount of on-site performance test data in power plants the statistic accuracy for the PFD system is given. It shows that in comparison with conventional F3D design methodology another 1.5-2 percent of HP and IP overall section efficiency improvement has been achieved.

scholarly journals Integrated Computer-Aided Mechanical Design System using MODEL.

1993 ◽  
Vol 59 (567) ◽  
pp. 3597-3602
Author(s):  
Hideyuki Mori ◽  
Nobuyuki Igata ◽  
Hiroaki Kobayashi ◽  
Tadao Nakamura
Keyword(s):  
Mechanical Design ◽  
Design System ◽  
Computer Aided

Mechanical-Design-Oriented Knowledge-Driven Model

2010 ◽  
Vol 44-47 ◽  
pp. 1987-1990
Author(s):  
De Fang Liu ◽  
Bin Wang ◽  
Hong Pan Wu
Keyword(s):  
Product Design ◽  
Design Process ◽  
Collaborative Design ◽  
Explicit Knowledge ◽  
Mechanical Design ◽  
System Structure ◽  
Design System ◽  
Normal Product ◽  
Knowledge Reasoning ◽  
Product Design Process

According to the characters of mechanical product design, product design knowledge is classified into explicit knowledge and indefinite knowledge. A knowledge-driven product design system model was proposed based on the knowledge management. To meet the normal product design process, the design system structure was built on four layers. A mixed knowledge reasoning strategy was proposed, which is combined by design cases, models, and rules. The system provides a public integration interface, so different design tools such as UG NX, Catia and Pro-E can be applied. To resolve the design conflict in product design process, a collaborative design technique was put forward that the CAD, CAPP, CAM engineers worked togeth

Research on Innovative Product Design System Based on QFD and TRIZ

2006 ◽  
Vol 532-533 ◽  
pp. 1144-1147 ◽  
Author(s):  
Cong Da Lu ◽  
Zhi Ping Liao ◽  
Shao Fei Jiang ◽  
Gao Jin Liu
Keyword(s):  
Product Design ◽  
Mechanical Design ◽  
Design System ◽  
Innovative Product ◽  
House Of Quality ◽  
Technical Measure ◽  
Innovative Design ◽  
Quality Function ◽  
Two Measures ◽  
Quality Function Development

This paper presents an innovative product design system based on Quality Function Development (QFD) and Theory of Inventive Problem Solving (TRIZ in Russian abbreviation). House of Quality (HOQ) is the core of QFD. To make QFD more practical and operable for small and medium-sized companies, a simplified model of HOQ is proposed. A set of reasoning scheme for inferring requirements relationships is adopted to facilitate constructing the HOQ. The contradiction in the process of mechanical design is defined by TRIZ as physical contradiction and technical contradiction. These two contradictions are solved through contradiction matrix and inventive principles of TRIZ. The innovative design system mainly uses the tool of contradiction matrix to solve the bottle techniques attained from QFD. By taking the HOQ as its interface the integration between QFD and TRIZ is realized. After conducting quality function development, two outputs can be obtained. They are the technical measure needing improvement and the technical measure that is getting worse while improving the former one. These two measures are taken as inputs of TRIZ module to analyze and solve the problem of product design.

A Distributed Environment for Collaborative Design

2007 ◽  
Author(s):  
Zhiqiang Chen ◽  
Zahed Siddique
Keyword(s):  
Collaborative Design ◽  
Mechanical Design ◽  
Design System ◽  
Design Tools ◽  
Distributed Environment ◽  
Engineering Project ◽  
Collaborative Environment ◽  
Schedule Design ◽  
Aircraft Component ◽  
Design Systems

Tools and applications are needed to provide engineers with support to design in a distributed and collaborative environment. These systems and tools need to make it possible to share design information, and schedule design process so that a group of distributed engineers can work together. Software level design is the prerequisite condition for applying any design approaches into the distributed mechanical design and in this paper, basic design systems and design tools are developed so that a typical distributed mechanical design can be supported. Requirements for a collaborative design system are presented, along with requirements to develop a prototype distributed system. The system is demonstrated on reverse engineering project for an aircraft component.

Research of 3D Parametric Design System of Worm Drive Based on Pro/E

2013 ◽  
Vol 712-715 ◽  
pp. 1107-1110
Author(s):  
Hong Bin Niu ◽  
Xiao Hua Li
Keyword(s):  
Parametric Design ◽  
Mechanical Design ◽  
Worm Gear ◽  
Secondary Development ◽  
Design System ◽  
Calculation Of Parameters ◽  
Gear Design ◽  
Result Show ◽  
Design Documents ◽  
Worm Drive

Parametric design is one of reliable and effective modern mechanical design technologies. The process of 3D parametric design system of worm gear was developed to aim directly the character of worm drive. Establishment of CAD model of worm gear, design and calculation of parameters of worm drive and the output of design documents and drawings were solved based on the secondary development for Pro/E. Then a relative example is given to prove its feasibility and efficiency. The operation result show design efficiency of worm gear is enhanced greatly by using this 3D parametric design system, which meets the needs of modern mechanical design. This study also provides a reference to 3D parametric design for other parts.

scholarly journals Sparrow: A Magnetic Climbing Robot for Autonomous Thickness Measurement in Ship Hull Maintenance

2020 ◽  
Vol 8 (6) ◽  
pp. 469 ◽  
Author(s):  
Raihan Enjikalayil Abdulkader ◽  
Prabakaran Veerajagadheswar ◽  
Nay Htet Lin ◽  
Selva Kumaran ◽  
Suresh Raj Vishaal ◽  
...  
Keyword(s):  
Mechanical Design ◽  
Life Time ◽  
Thickness Measurement ◽  
Design System ◽  
Operating Efficiency ◽  
System Control ◽  
Ship Hulls ◽  
Inspection Robot ◽  
Metal Thickness ◽  
Human Operators

The maintenance of ship hulls involves a series of routine tasks during dry-docking that renews its life-time and operating efficiency. One such task is hull inspection, which is always seen as harmful for human operators and a time-consuming task. The shipping maintenance industries started using the robotic solutions in order to reduce the human risk. However, most of such robotic systems cannot operate fully autonomously due to the fact that it requires humans in the loop. On the other hand, an autonomous hull inspection robot, called Sparrow, is presented in this paper. The proposed robot is capable of navigating autonomously on the vertical metal surface and it could perform metal thickness inspection. This article summarizes the robot’s mechanical design, system control, autonomy, and the inspection module. We evaluated the robot’s performance by conducting experimental trials on three different metal plates that varied in thickness. The results indicate that the presented robot achieves significantly better locomotion while climbing, and it can autonomously measure the metal thickness, which significantly reduces the human efforts in real-time.

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