Design Shell: A Framework for Interactive Parametric Design

1990 ◽  
Author(s):  
Raman V. Srinivasan ◽  
Rajiv Agrawal ◽  
Gary L. Kinzel
Keyword(s):  
Design Methodology ◽  
Parametric Design ◽  
Simultaneous Equation ◽  
Design Parameters ◽  
Design Tools ◽  
Design Environment ◽  
Computer Tool ◽  
Overall Design ◽  
Computer Based ◽  
Torsion Bar

Abstract This paper consists of a study of the mechanical engineering design methodology and the development of a computer-based framework for performing design. The framework, known as the Design Shell, provides the essential design tools, such as, constraint manager, nonlinear simultaneous equation solvers, optimizers, sensitivity analyzer, and graphics handler, in an interactive design environment. The design shell attempts to enhance the designer’s understanding of the relationships between the various design parameters and how these affect the overall design. As an illustration of the capabilities of the computer tool, the design of a torsion bar spring is presented in the paper.

Space Hardware Advanced Manufacturing Engineering: SHAME to miss out on a potential game changer?

2018 ◽  
Vol 26 (1) ◽  
pp. 117-126
Author(s):  
Laurent Pambaguian ◽  
Eleonie van Schreven ◽  
Ilaria Roma
Keyword(s):  
Systems Engineering ◽  
Design Methodology ◽  
European Space Agency ◽  
Systems Design ◽  
Design Parameters ◽  
Concurrent Design ◽  
Potential Game ◽  
Advanced Manufacturing ◽  
Design Environment ◽  
The Impact

Advanced Manufacturing is widely used with features and applications playing a game changing role in our daily life. The European Space Agency has initiated in April 2016 a multi-disciplinary approach exploring the impact of infusing Advanced Manufacturing into space practices. A Concurrent Design Facility study was performed investigating potential design methodology amendments produced by introducing Advanced Manufacturing techniques into the design space. Innovative materials and processes were added to the conventional design parameters usually populating the systems design trade-spaces. This enabled multifunctional solutions, previously inconceivable, with a redefinition of interfaces and related requirements, shifted from ‘discipline’ boundaries to ‘units’ or ‘assembly’ boundaries. The Concurrent Design Facility Study identified the core domains of expertise required in a ‘Design for Advanced Manufacturing’ frame, governed by a flexible, open-minded systems engineering coordination. Early involvement of material and process engineers in the design proved to be an essential ingredient of the ‘Design for Advanced Manufacturing’ recipe. The design freedom brought by Advanced Manufacturing calls for unconventional design solutions, creativity becomes a need and infusion from non-space is invaluable. Biomimicry and architecture principles enriched the concurrent design environment, which proved to be very well suited with the needs and objectives of the new design methodology. This article reports the Concurrent Design Facility study conduct, as first attempt to understand Advanced Manufacturing impact on design methodology, the study cases selected for analysis, the observations on the methodology and on the interactions among the specialists in the team. The study outcome is reported, including an overview of benefits, disadvantages and points for further investigation in relation to the study cases assessed. In addition, the paper proposes recommendations for injecting Advanced Manufacturing into the project life cycle, from early design up to procurement phases and ultimately to the assembly, integration and verification phases, indicating required modelling tools, technologies and redefined engineering roles and expertise.

A Computer Based Design Methodology

1987 ◽  
Author(s):  
K. Andersen ◽  
G. E. Cook ◽  
A. M. Strauss
Keyword(s):  
Design Methodology ◽  
Design Concept ◽  
Design Parameters ◽  
Design Structure ◽  
Computer Based ◽  
Design Requirements ◽  
Feasible Solutions ◽  
Human Designer ◽  
Selection Of

Abstract A methodology is presented for automating or at least aiding a human designer in selection of a design concept for given design requirements. Futhermore the proposed methodology provides reasonable estimates for the various parameters of the design structure. This is accomplished by representing design requirements and design parameters as multidimensional vectors and performing appropriate interpolations to estimate feasible solutions.

Assessment of land-use change in coastal areas through geographical information systems

2020 ◽  
Vol 13 (10) ◽  
Author(s):  
Verónica Lango-Reynoso ◽  
Karla Teresa González-Figueroa ◽  
Fabiola Lango-Reynoso ◽  
María del Refugio Castañeda-Chávez ◽  
Jesús Montoya-Mendoza
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Geographical Information Systems ◽  
Design Methodology ◽  
Scientific Information ◽  
Coastal Ecosystems ◽  
Coastal Areas ◽  
Geographical Information ◽  
Coastal Zones ◽  
Computer Based

Objective: This article describes and analyzes the main concepts of coastal ecosystems, these as a result of research concerning land-use change assessments in coastal areas. Design/Methodology/Approach: Scientific articles were searched using keywords in English and Spanish. Articles regarding land-use change assessment in coastal areas were selected, discarding those that although being on coastal zones and geographic and soil identification did not use Geographic Information System (GIS). Results: A GIS is a computer-based tool for evaluating the land-use change in coastal areas by quantifying variations. It is analyzed through GIS and its contributions; highlighting its importance and constant monitoring. Limitations of the study/Implications: This research analyzes national and international scientific information, published from 2007 to 2019, regarding the land-use change in coastal areas quantified with the digital GIS tool. Findings/Conclusions: GIS are useful tools in the identification and quantitative evaluation of changes in land-use in coastal ecosystems; which require constant evaluation due to their high dynamism.

Acoustic meta-silencer: Toward enabling ultrawide-band air-permeable noise barrier

2021 ◽  
pp. 107754632110011
Author(s):  
Mohammad Javad Khodaei ◽  
Amin Mehrvarz ◽  
Reza Ghaffarivardavagh ◽  
Nader Jalili
Keyword(s):  
Heat Transfer ◽  
Design Methodology ◽  
Heat Transfer Performance ◽  
Transmission Loss ◽  
Design Parameters ◽  
Transfer Performance ◽  
Noise Mitigation ◽  
Acoustic Cavity ◽  
Road Map ◽  
Noise Barrier

In this article, we have first presented a metasurface design methodology by coupling the acoustic cavity to the coiled channel. The geometrical design parameters in this structure are subsequently studied both analytically and numerically to identify a road map for silencer design. Next, upon tuning the design parameters, we have introduced an air-permeable noise barrier capable of sound silencing in the ultrawide band of the frequency. It is has been shown that the presented metasurface can achieve +10 dB sound transmission loss from 170 Hz to 1330 Hz (≈3 octaves). Furthermore, we have numerically studied the ventilation and heat transfer performance of the designed metasurface. Enabling noise mitigation by leveraging the proposed metasurface opens up new possibilities ranging from residential and office noise reduction to enabling ultralow noise fan, propellers, and machinery.

Research on the Optimal Design Method of the Main Components for the Wheelchair Pickup

2013 ◽  
Vol 791-793 ◽  
pp. 799-802
Author(s):  
Ya Ping Wang ◽  
H.R. Shi ◽  
L. Gao ◽  
Z. Wang ◽  
X.Y. Jia ◽  
...  
Keyword(s):  
Parametric Design ◽  
Design Method ◽  
Basic Function ◽  
Design Parameters ◽  
Algorithm Optimization ◽  
Optimization Analysis ◽  
Research Designs ◽  
Optimal Design Method ◽  
Main Components

With the increasing of the aging of population all over the world, and With the inconvenience coming from diseases and damage, there will be more and more people using the wheelchair as a tool for transport. When it cant be short of the wheelchair in the daily life, the addition of the function will bring the elevation of the quality of life for the unfortunate. Staring with this purpose, the research designs a pickup with planetary bevel gear for the wheelchair. After determining the basic function of the wheelchair aids, the study determines the design parameters by using the knowledge of parametric design and completes the model for the system with Pro/E, on the other hand, it completes key components optimization analysis which is based on genetic algorithm optimization.

Momentum exchange impact damper design methodology for object-wall-collision problems

2017 ◽  
Vol 24 (14) ◽  
pp. 3206-3218
Author(s):  
Yohei Kushida ◽  
Hiroaki Umehara ◽  
Susumu Hara ◽  
Keisuke Yamada
Keyword(s):  
Optimal Design ◽  
Design Methodology ◽  
Design Parameters ◽  
Momentum Exchange ◽  
Impact Damper ◽  
One Dimensional ◽  
Practical Design ◽  
Wall Collision ◽  
Damper Design ◽  
And Control

Momentum exchange impact dampers (MEIDs) were proposed to control the shock responses of mechanical structures. They were applied to reduce floor shock vibrations and control lunar/planetary exploration spacecraft landings. MEIDs are required to control an object’s velocity and displacement, especially for applications involving spacecraft landing. Previous studies verified numerous MEID performances through various types of simulations and experiments. However, previous studies discussing the optimal design methodology for MEIDs are limited. This study explicitly derived the optimal design parameters of MEIDs, which control the controlled object’s displacement and velocity to zero in one-dimensional motion. In addition, the study derived sub-optimal design parameters to control the controlled object’s velocity within a reasonable approximation to derive a practical design methodology for MEIDs. The derived sub-optimal design methodology could also be applied to MEIDs in two-dimensional motion. Furthermore, simulations conducted in the study verified the performances of MEIDs with optimal/sub-optimal design parameters.

Shape-design optimization of hull structures considering thermal deformation

2013 ◽  
Vol 228 (13) ◽  
pp. 2266-2277
Author(s):  
Myung-Jin Choi ◽  
Min-Geun Kim ◽  
Seonho Cho
Keyword(s):  
Optimal Design ◽  
Design Optimization ◽  
Thermal Deformation ◽  
Parametric Design ◽  
Optimization Method ◽  
Optimization Process ◽  
Design Parameters ◽  
Shape Design ◽  
Shape Design Optimization ◽  
Modified Method

We developed a shape-design optimization method for the thermo-elastoplasticity problems that are applicable to the welding or thermal deformation of hull structures. The point is to determine the shape-design parameters such that the deformed shape after welding fits very well to a desired design. The geometric parameters of curved surfaces are selected as the design parameters. The shell finite elements, forward finite difference sensitivity, modified method of feasible direction algorithm and a programming language ANSYS Parametric Design Language in the established code ANSYS are employed in the shape optimization. The objective function is the weighted summation of differences between the deformed and the target geometries. The proposed method is effective even though new design variables are added to the design space during the optimization process since the multiple steps of design optimization are used during the whole optimization process. To obtain the better optimal design, the weights are determined for the next design optimization, based on the previous optimal results. Numerical examples demonstrate that the localized severe deviations from the target design are effectively prevented in the optimal design.

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