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Design tool

About: Design tool is a research topic. Over the lifetime, 3864 publications have been published within this topic receiving 46401 citations.


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Journal ArticleDOI
01 Aug 2008
TL;DR: In this paper, the Eurocode-Basis of Structural Design is considered as the appropriate design tool in this respect, however, the design process is translated into a verification process on the basis of partial factors, theoretical considerations and long-term design experience are mixed.
Abstract: Designing a structure essentially comes down to making decisions in the face of uncertainty. This paper discusses how the new generation of European standards, the Eurocodes, deals with this issue. According to EN 1990 Eurocode-Basis of Structural Design, the theory of probability may be considered as the appropriate design tool in this respect. To keep the design process practicable, however, the probabilistic methods are translated into a verification process on the basis of partial factors. In setting values for the partial factors, theoretical considerations and long-term design experience are mixed. Next to the design for normal loading conditions, the Eurocode gives special attention to the design for accidental situations such as fire, explosions or errors. When dealing with these topics the code is of a more informal nature, giving freedom to designers and authorities. The recommendations range from prescribed solutions (minimal ductility and redundancy, horizontal and vertical tyings, etc.) to a formal risk analysis for important or extraordinary structures. Non-structural measures, extra safety for key elements and alternative load paths are presented as valuable elements in the safety strategy. The code reflects the increasing awareness of the engineering society for the importance of risk-based decision making in design and maintenance.

17 citations

Book ChapterDOI
01 Jan 2005
TL;DR: The chapter shows how Greedypipe can be used to obtain good assignments in an environment where the total number of processor stages in all the pipelines is constrained.
Abstract: This chapter presents Greedypipe, a heuristic approach that quickly performs near optimal task-to-pipeline stage assignments in a multiple flow, multiple pipeline environment. Though obtaining optimal assignments is a network processors (NP) hard problem, Greedypipe quickly obtains very good assignments. While Greedypipe can be used in obtaining throughput performance in a variety of pipelining environments, its development was motivated by the growing importance of embedded processor systems that are based on having multiple pipelines on a single chip. This sort of design is used extensively in current network processors. The chapter also illustrates how Greedypipe can be employed as a design tool in situations where the effects of pipeline depth, task sharing, and task partitioning are to be explored as part of the design process. This is done for a generic design case, and a case where three flows are present, each flow requiring one or more networking functions (Longest Prefix Match, Encryption, and Compression). The chapter shows how Greedypipe can be used to obtain good assignments in an environment where the total number of processor stages in all the pipelines is constrained. New methods are now being explored to incorporate into Greedypipe performance issues related to memory constraints and contention, and in using both dynamic programming and statistical optimization techniques to obtain optimal solutions.

17 citations

Proceedings ArticleDOI
01 Sep 2007
TL;DR: OpenProp as mentioned in this paper is an open source computational propeller/turbine design tool, the user-friendly open source MIT Propeller Vortex Lattice Lifting Line Program (OpenProp).
Abstract: An open source computational propeller/turbine design tool, the user-friendly open source MIT Propeller Vortex Lattice Lifting Line Program (OpenProp), is presented in this paper. This code has applications in propeller design for AUV and ROV thrusters as well as conventional propellers. The code is also being utilized for tidal turbine design. OpenProp is designed to be a fast parametric design tool for use by engineers with little training in propeller design. This tool can also be used by more experienced designers, as a preliminary design tool, to produce a starting design for further refinement using more advanced design and analysis codes. Various design examples are presented, including an ROV propeller design and a contra-rotating AUV Thruster design. These propellers were constructed and performance tested. The performance data for these propeller designs is also presented. The code was validated against the US Navy's PLL code and these results are also presented. The OpenProp propeller design tool is part of a suite of open source tools under development for rapid design, building and testing of propeller design models.

17 citations

Proceedings ArticleDOI
24 Mar 2014
TL;DR: It is shown how system-level simulation models suitable for design-space exploration of complex architectures can be synthesized from functional specifications to test and validate the interactions between ECUs, control algorithms, and the multi-physics.
Abstract: This paper presents our multi-year experience in the development of a Functional Modeling Compiler (FMC), a new model-based design tool for the development of multi-disciplinary automotive cyber-physical systems. We show how system-level simulation models suitable for design-space exploration of complex architectures can be synthesized from functional specifications to test and validate the interactions between ECUs, control algorithms, and the multi-physics.

17 citations

Book
15 Oct 2004
TL;DR: Xiaoning Li Conflict-based Method for Conceptual Process Synthesis Lappeenranta 2004 79 p. as mentioned in this paper presents a conflict-based methodology for conceptual process synthesis to support decision-making in design and synthesis and to enhance the creativity of design activities.
Abstract: Xiaoning Li Conflict-based Method for Conceptual Process Synthesis Lappeenranta 2004 79 p. Acta Universitatis Lappeenrantaensis 187 Diss. Lappeenranta University of Technology ISBN 951-764-941-X ISSN 1456-4491 The changing business environment demands that chemical industrial processes be designed such that they enable the attainment of multi-objective requirements and the enhancement of innovative design activities. The requirements and key issues for conceptual process synthesis have changed and are no longer those of conventional process design; there is an increased emphasis on innovative research to develop new concepts, novel techniques and processes. A central issue, how to enhance the creativity of the design process, requires further research into methodologies. The thesis presents a conflict-based methodology for conceptual process synthesis. The motivation of the work is to support decision-making in design and synthesis and to enhance the creativity of design activities. It deals with the multi-objective requirements and combinatorially complex nature of process synthesis. The work is carried out based on a new concept and design paradigm adapted from Theory of Inventive Problem Solving methodology (TRIZ). TRIZ is claimed to be a ‘systematic creativity’ framework thanks to its knowledge based and evolutionary-directed nature. The conflict concept, when applied to process synthesis, throws new lights on design problems and activities. The conflict model is proposed as a way of describing design problems and handling design information. The design tasks are represented as groups of conflicts and conflict table is built as the design tool. The general design paradigm is formulated to handle conflicts in both the early and detailed design stages. The methodology developed reflects the conflict nature of process design and synthesis. The method is implemented and verified through case studies of distillation system design, reactor/separator network design and waste minimization. Handling the various levels of conflicts evolve possible design alternatives in a systematic procedure which consists of establishing an efficient and compact solution space for the detailed design stage. The approach also provides the information to bridge the gap between the application of qualitative knowledge in the early stage and quantitative techniques in the detailed design stage. Enhancement of creativity is realized through the better understanding of the design problems gained from the conflict concept and in the improvement in engineering design practice via the systematic nature of the approach.

17 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20233
20227
202184
2020133
2019139
2018157