scholarly journals A Cost Based Methodology for Design Optimization

2005 ◽  
Author(s):  
A. R. Rao ◽  
A. J. Keane ◽  
J. P. Scanlan
Keyword(s):  
Design Optimization ◽  
Cost Estimation ◽  
Decision Support Tool ◽  
Aircraft Engine ◽  
Optimization Techniques ◽  
Automated System ◽  
Manufacturing Cost ◽  
Element Analysis ◽  
Support Tool ◽  
Feature Based

Design optimization algorithms have traditionally focused on lowering weight and improving structural performance. Although cost is a vital factor in every emerging design, existing tools lack key features and capabilities in optimizing designs for minimum product cost at acceptable performance levels. This paper presents a novel methodology for developing a decision support tool for designers based on manufacturing cost. The approach focuses on exploiting the advantages offered by combining parametric CAD, Finite element analysis, feature based cost estimation and optimization techniques within a single automated system. This methodology is then applied in optimizing the geometry for minimum manufacturing cost of an engine mounting link from a Rolls-Royce civil aircraft engine.

scholarly journals DESIGN OPTIMIZATION FOR WEIGHT REDUCTION OF LOCOMOTIVE WHEEL USING RESPONSE SURFACE METHODOLOGY

2020 ◽  
Vol 6 (1) ◽  
pp. 39-46
Author(s):  
Harmesh Lal ◽  
Balkar Singh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Response Surface Methodology ◽  
Design Optimization ◽  
Response Surface ◽  
Weight Reduction ◽  
Equivalent Stress ◽  
Manufacturing Cost ◽  
Element Analysis ◽  
Structural Loading

Manufacturing cost of locomotive wheel largely depends on mass of locomotive wheel and to reduce mass of wheel, design optimization is necessary. In this research the design of locomotive wheel is optimized considering hub radius and hub width as input parameters to DOE (Design of Experiments). Initially finite element analysis is performed under static structural loading conditions to determine equivalent stress and safety factor which is followed by design optimization using Response Surface Methodology. The software used for design and analysis is ANSYS.

Design Optimization of a Ship Hull Block Based on Finite Element Analysis

2005 ◽  
Author(s):  
Chang Doo Jang ◽  
Ha Cheol Song ◽  
In Seop Hwang ◽  
Sang Hoon Shin ◽  
Jong Hwan Lee ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Optimization ◽  
Analytical Data ◽  
Optimization Techniques ◽  
Ship Hull ◽  
Iteration Step ◽  
Design Stage ◽  
Element Analysis ◽  
Target Model

Optimization techniques for shipbuilding have been developed to design large-scaled commercial vessels based on classification rules and analytical data, but most of the target model in the past were restricted to the mid-ship section design in the preliminary design stage. By contrast, preceding researches about the design optimization of detailed structures are relatively rare since narrow information has been provided as the design guide for such structures. In this study, the minimum weight design of a ship hull block was carried out based on the finite element analysis. The target model for design optimization is a stiffened deck block of LNG carrier for upholding a main boiler. The weight of a ship hull block and the main dimensions of structural members are chosen as an objective function and design variables, respectively. An optimization algorithm was adopted to escape the local minima and reduce CPU time in analysis procedure, and finite element analysis was performed to determine the constraint parameters at each iteration step in optimization loop. Optimization results were compared with an existing ship, and the effects of optimum design were examined from various points of view.

Warehouse management system customization and information availability in 3pl companies

2019 ◽  
Vol 119 (2) ◽  
pp. 251-273 ◽  
Author(s):  
Giulia Baruffaldi ◽  
Riccardo Accorsi ◽  
Riccardo Manzini
Keyword(s):  
Management System ◽  
Decision Support Tool ◽  
Optimization Techniques ◽  
Warehouse Management ◽  
Management Scenarios ◽  
Content Type ◽  
Support Tool ◽  
Information Availability ◽  
Digital Twin ◽  
Warehouse Management System

PurposeThe purpose of this paper is to illustrate an original decision-support tool (DST) that aids 3PL managers to decide on the proper warehouse management system (WMS) customization. The aim of this tool is to address to the three main issues affecting such decision: the cost of the information sharing, the scarce visibility of the client’s data and the uncertainty of quantifying the return from investing into a WMS feature.Design/methodology/approachThe tool behaves as a digital twin of a WMS. In addition, it incorporates a set of WMS’s features based both on heuristics and optimization techniques and uses simulation to perform what-if multi-scenario analyses of alternative management scenarios. In order to validate the effectiveness of the tool, its application to a real-world 3PL warehouse operating in the sector of biomedical products is illustrated.FindingsThe results of a simulation campaign along an observation horizon of ten months demonstrate how the tool supports the comparison of alternative scenarios with theas-is, thereby suggesting the most suitable WMS customization to adopt.Practical implicationsThe tool supports 3PL managers in enhancing the efficiency of the operations and the fulfilling of the required service level, which is increasingly challenging given the large inventory mix and the variable clients portfolio that 3PLs have to manage. Particularly, the choice of the WMS customization that better perform with each business can be problematic, given the scarce information visibility of the provider on the client’s processes.Originality/valueTo the author’s knowledge, this paper is among the first to address a still uncovered gap of the warehousing literature by illustrating a DST that exploits optimization and simulation techniques to quantify the impacts of the information availability on the warehousing operations performance. As a second novel contribution, this tool enables to create a digital twin of a WMS and foresee the evolution of the warehouse’s performance over time.

scholarly journals Applying Multiobjective Cost and Weight Optimization to the Initial Design of Turbine Disks

2007 ◽  
Vol 129 (12) ◽  
pp. 1303-1310 ◽  
Author(s):  
A. R. Rao ◽  
J. P. Scanlan ◽  
A. J. Keane
Keyword(s):  
Fatigue Life ◽  
Minimum Weight ◽  
Minimum Cost ◽  
Aircraft Engine ◽  
Integrated System ◽  
Structural Performance ◽  
Manufacturing Cost ◽  
Optimization Approach ◽  
Element Analysis ◽  
Conflicting Objectives

Aerospace design optimization typically explores the effects of structural performance and aerodynamics on the geometry of a component. This paper presents a methodology to incorporate manufacturing cost and fatigue life models within an integrated system to simultaneously trade off the conflicting objectives of minimum weight and manufacturing cost while satisfying constraints placed by structural performance and fatigue. A case study involving the design of a high pressure turbine disk from an aircraft engine is presented. Manufacturing cost and fatigue life models are developed in DECISIONPRO™, a generic modeling tool, whereas finite element analysis is carried out in the Rolls-Royce PLC proprietary solver SC03. A multiobjective optimization approach based on the nondominated sorting genetic algorithm (NSGA) is used to evaluate the Pareto front for minimum cost and volume designs. A sequential workflow of the different models embedded within a scripting environment developed in MATLAB™ is used for automating the entire process.

Design Optimization Study of Isolation Mount Systems for Gas Turbine Engine Accessories

2005 ◽  
Author(s):  
William Sheridan ◽  
Kazem Kazerounian
Keyword(s):  
Design Optimization ◽  
Gas Turbine ◽  
Cost Effective ◽  
Gas Turbine Engine ◽  
Optimization Techniques ◽  
Optimization Process ◽  
Element Analysis ◽  
Isolation System ◽  
Turbine Engine ◽  
Effective Manner

Design optimization has become increasingly important in today’s world. The ability to develop products that offer the best possible solution, distinguish industry leaders from those that lag behind. To reach this goal, optimization techniques are required which provide solutions in a timely and cost effective manner. This paper addresses a specific optimization process for designing isolation mount systems for gas turbine engine accessory components. This process enables the designer to quickly select an isolation system that will reduce the loads on components without the use of a time consuming Finite Element Analysis (FEA). Commercially available tools such as MATLAB [7] and MSC-WORKING MODEL 2D [6] are used to study a range of mount systems and help the designer focus his attention on the best choice of design variables. Gas Turbine engine accessory mount systems are generally sized by emergency conditions such as Fan Blade Out (FBO). These emergency conditions are rarely seen in service, but since they can drive the cost and weight of the mount system, an optimization process is needed to select the best configurations. References [8] through [10] discuss this in detail. Design Cycle time is just as important as cost and weight. The ability to size and package components quickly and accurately is vital to the design process. Poor utilization of space can drive cost and weight as much as poor component design. Knowing the correct size of the mount system in a rapid fashion offers further opportunities for surrounding components & systems to be optimized.

A HYBRID FUZZY-PROMETHEE METHOD FOR LOGISTICS SERVICE SELECTION: DESIGN OF A DECISION SUPPORT TOOL

2010 ◽  
Vol 18 (04) ◽  
pp. 345-369 ◽  
Author(s):  
DAVIDE ALOINI ◽  
RICCARDO DULMIN ◽  
VALERIA MININNO
Keyword(s):  
Service Providers ◽  
Selection Process ◽  
Service Selection ◽  
Decision Support Tool ◽  
Automated System ◽  
Electronic Market ◽  
Support Tool ◽  
Logistics Service ◽  
Carrier Selection ◽  
Promethee Method

Among the traditional logistics services, transportation is one of the most commonly outsourced activities. Nevertheless the carrier selection process is critic presenting its own peculiarities which should be accurately managed. This paper presents a hybrid multi-criteria/fuzzy method for the selection of the carrier among a number of pre-selected logistics service providers. The method was developed and applied to the case of Power-One Inc., a multinational company in the Power-electronic market. Finally, an automated system supporting the decision making process was designed to support users.

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