scholarly journals A Conceptual Design Tool for Resolving Conflicts Between Product Functionality and Environmental Impact

2010 ◽  
Vol 132 (9) ◽  
Author(s):  
Daniel P. Fitzgerald ◽  
Jeffrey W. Herrmann ◽  
Linda C. Schmidt
Keyword(s):  
Environmental Impact ◽  
Conceptual Design ◽  
Unit Cost ◽  
Design Tool ◽  
Time To Market ◽  
Development Organizations ◽  
Conceptual Design Phase ◽  
Design By Analogy ◽  
Phase Design ◽  
Product Functionality

Product development organizations are unwilling to compromise product functionality, unit cost, or time to market in order to create products that have less environmental impact than that required by regulations. Thus, designers may face a conflict between improving product functionality and reducing environmental impact. The design for environment (DfE) tools currently available are inadequate with respect to helping designers determine how to resolve this conflict during the conceptual design phase. Design-by-analogy is a promising conceptual design approach for this problem. Examples of products that simultaneously reduce environmental impact and improve product functionality can inspire designers to do likewise. The challenges are to generate the relevant knowledge and to organize it in an accessible DfE tool. This paper describes an approach for generating and organizing this knowledge, an analysis of successful products, and a table of successful designs.

scholarly journals Conceptual Design for Assembly in Aerospace Industry: A Method to Assess Manufacturing and Assembly Aspects of Product Architectures

2019 ◽  
Vol 1 (1) ◽  
pp. 2961-2970 ◽  
Author(s):  
Francois Bouissiere ◽  
Claude Cuiller ◽  
Pierre-Eric Dereux ◽  
Corentin Malchair ◽  
Claudio Favi ◽  
...  
Keyword(s):  
Production Rate ◽  
Conceptual Design ◽  
Process Improvement ◽  
Design Tool ◽  
Test Case ◽  
Architecture Design ◽  
Passenger Transport ◽  
Conceptual Design Phase ◽  
Civil Aircraft ◽  
Preliminary Application

AbstractIn recent years, the air transport market has quickly grown, creating new civil aircrafts demand, challenging the actual production rate of aerospace industries. The bottleneck of the current civil aircrafts production rate lies in the capability of the manufacturing and assembly facilities in relation to the aircrafts architecture design.The aim of this work is to develop a methodology and a related mathematical model that can be used at the conceptual design phase for the assessment of criticalities related to the product assemblability. The methodology allows to recognize modules and/or interfaces which are mostly affecting the assembly time providing a design tool for the comparison and evaluation of product architecture alternatives.A preliminary application has been done on the nose-fuselage of a civil aircraft for passenger transport. The test case provides interesting outcome in the identification of modules and module interfaces which are strongly affecting the assembly phase and required a re-arrangement (new architecture design) for the process improvement.

A New Analytical Model of a Centrifugal Compressor and Validation by Experiments

2010 ◽  
Vol 26 (1) ◽  
pp. 37-45 ◽  
Author(s):  
H. Pourfarzaneh ◽  
A. Hajilouy-Benisi ◽  
M. Farshchi
Keyword(s):  
Conceptual Design ◽  
Centrifugal Compressor ◽  
Experimental Studies ◽  
Design Tool ◽  
Operating Conditions ◽  
Experimental Results ◽  
Design Phase ◽  
Robust Model ◽  
Conceptual Design Phase ◽  
Wide Range

AbstractIn the conceptual design phase of a turbocharger, where emphasis is mainly on parametric studies, before manufacturing and tests, a generalized and robust model that implies over a wide range properly, is unavoidable. The critical inputs such as compressor maps are not available during the conceptual design phase. Hence, generalized compressor models use alternate methods that work without any supplementary tests and can operate on wide range. One of the common and applicable modeling methods in design process is the ‘Dimensionless Modeling’ using the constant coefficient scaling (CCS). This method almost can predict the compressor characteristics at design point. However, at off design conditions, error goes up as mass flow and speed parameters increase. Therefore, the results are not reliable at these points. In this paper, a variable coefficient scaling (VCS) method is described. Then, a centrifugal compressor is modeled using the VCS method. To evaluate the model and compare it with the experimental results, some supplementary experiments are performed. Experimental studies are carried out on the compressor of a S2B model of the Schwitzer turbocharger in the turbocharger Lab., at Sharif University of Technology. The comparison between the experimental results and those obtained by the VCS method indicates a good agreement. It also suggests that the present model can be used as an effective design tool for all operating conditions.

Conceptual Cost Estimation of Multistage Axial Compressor Modules

2019 ◽  
Author(s):  
Claudio Favi ◽  
Federico Campi ◽  
Marco Mandolini ◽  
Irene Martinelli ◽  
Michele Germani
Keyword(s):  
Conceptual Design ◽  
Cost Estimation ◽  
Gas Turbines ◽  
Axial Compressor ◽  
Cost Effective ◽  
Design Tool ◽  
Design Solution ◽  
Cost Models ◽  
Conceptual Design Phase ◽  
The Right

Abstract Development of product architectures is a fundamental task in the conceptual design of complex products such as axial compressor of gas turbines. The definition of cost-effective architectures results from the introduction of conceptual cost estimation models aiming at the assessment of economical performances of different modules. Conceptual cost estimation means the product cost assessment in conceptual design phase. These models vary based on the technical and geometrical features of the defined product modules as well as to the specific manufacturing processes. The paper aims to describe the approach for early design cost estimation of Axial Compressor modules. The approach includes the design workflow and the required steps to build product architectures driven by cost indicator. The main limitation overtaken by the adoption of the proposed approach is the needs of a design tool able to characterize cost-effective design solution and to guide designer in product definition with the right level of confidence. The axial compressor product has been analyzed to retrieve different architectures and a case study of a rotor disc module is presented to demonstrate the feasibility of the proposed approach in the development of conceptual cost models starting from preliminary design information.

Accuracy of Analytical Engine Weight Estimation During the Conceptual Design Phase

2010 ◽  
Author(s):  
Fabian Donus ◽  
Reinhold Schaber ◽  
Klaus-Juergen Schmidt ◽  
Stephan Staudacher
Keyword(s):  
Conceptual Design ◽  
Estimation Method ◽  
Design Tool ◽  
Parameter Study ◽  
Test Case ◽  
Design Phase ◽  
Weight Estimation ◽  
Geometric Models ◽  
Conceptual Design Phase ◽  
Engine Design

This paper addresses the quality of weight estimation that can be achieved in the early design phase and illustrates the significance of the results for conceptual engine design. A study was undertaken to determine the accuracy of weight estimation during the conceptual design phase. To this end, different engines were modeled using the preliminary design tool MOPEDS. The estimation method used to generate the results is based on geometric models for the considered component parts that have been calibrated as closely as possible to the existing geometries. Furthermore, the modeled part weights provided by MOPEDS have been compared to the real part weights to assess the uncertainty of the estimation method. The deviations are discussed to identify where an improvement of the method could be profitable with regard to a better overall estimation. It has been shown that for some hardware the estimation method is already very accurate, whereas some parts have geometric models that require improvement to realize an overall high quality. One of the calibrated engine models was used additionally as the basis for a parameter study to determine the accuracy of the part weight estimation method using MOPEDS in automatic design mode. The results showed that the deviation in the overall component mass for each test case was nearly constant during this study.

A Computational Approach to Conceptual Design

2002 ◽  
Author(s):  
Zeke Strawbridge ◽  
Daniel A. McAdams ◽  
Robert B. Stone
Keyword(s):  
Conceptual Design ◽  
Morphological Analysis ◽  
Design Research ◽  
Computational Approach ◽  
Design Tool ◽  
Design Stage ◽  
Concept Selection ◽  
Computational Tools ◽  
Detail Design ◽  
Conceptual Design Phase

Design research has generated many computational tools to aid the designer over the years. Most of these tools are focused on either the preliminary steps of customer need gathering or the concluding steps of embodiment or detail design. The conceptual design phase has seen fewer computational tools even though well known methods are available such as brainstorming, intrinsic and extrinsic searches and morphological analysis. In this paper a generalized computational conceptual design tool is presented to aid designers at the conceptual design stage. It relies on storing and reusing existing design knowledge to create new concept variants. Concept variants are computed using matrix manipulations, essentially creating a mathematical morphological matrix. The concept generator produces quick concepts that can be used for concept selection or as a basis for generating additional concept variants through non-computational, creative techniques.

Multi-Level Optimization Method for Vehicle Body in Conceptual Design

2015 ◽  
Author(s):  
Wenbin Hou ◽  
Chunlai Shan ◽  
Hongzhe Zhang
Keyword(s):  
Conceptual Design ◽  
Optimal Algorithm ◽  
Optimization Method ◽  
Design Tool ◽  
The Body ◽  
Vehicle Body ◽  
Concept Design ◽  
Cross Sectional ◽  
Design Engineers ◽  
Conceptual Design Phase

Since product development lead-time needs to be as short as possible in contemporary enterprises, it is necessary to assess and optimize the performance of the structure in conceptual design phase for avoiding the time consuming production of trial models for vehicle body. This paper proposes a conceptual design tool based on optimization algorithms for global body frames named Vehicle Concept Design-Intelligent CAE system (VCD-ICAE). A multilevel optimization algorithm is applied to optimize the body performance, decide the size parameters, and generate cross-sectional shapes that satisfy design engineers’ required characteristics. The global body stiffness and vibration property would be optimized while decreasing the mass of body. The paper describes the implementation of the optimal algorithm, and Genetic algorithms are applied to solve the optimization problem. A case of optimization for a real car is given to verify the validity of the algorithm.

Correction: Nozzle Jet Effects Conceptual Design Tool for a Generic Fighter

2019 ◽  
Author(s):  
Valeria S. Guevara ◽  
Mark Moening ◽  
Brian R. Smith ◽  
Dennis B. Finley ◽  
Patrick J. Yagle
Keyword(s):  
Conceptual Design ◽  
Design Tool

Applying Function-Based Failure Propagation in Conceptual Design

2007 ◽  
Author(s):  
Daniel Krus ◽  
Katie Grantham Lough
Keyword(s):  
Risk Analysis ◽  
Product Design ◽  
Conceptual Design ◽  
Functional Model ◽  
Thermal Control ◽  
Design Phase ◽  
Historical Knowledge ◽  
Conceptual Design Phase ◽  
Failure Propagation ◽  
Potential Risks

When designing a product, the earlier the potential risks can be identified, the more costs can be saved, as it is easier to modify a design in its early stages. Several methods exist to analyze the risk in a system, but all require a mature design. However, by applying the concept of “common interfaces” to a functional model and utilizing a historical knowledge base, it is possible to analyze chains of failures during the conceptual phase of product design. This paper presents a method based on these “common interfaces” to be used in conjunction with other methods such as Risk in Early Design in order to allow a more complete risk analysis during the conceptual design phase. Finally, application of this method is demonstrated in a design setting by applying it to a thermal control subsystem.

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