Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Developing an investment decision methodology for helicopter systems related to technology factor and base price
Download
index.pdf
Date
2014
Author
Kara, Gözde
Metadata
Show full item record
Item Usage Stats
199
views
52
downloads
Cite This
In this thesis, a decision methodology is generated using purchase price of a helicopter related to its geometry sizing and performance parameters during design and technology factors in order to compare these prices with investment costs. MATLAB® and Minitab® software were used for technical computing and methodology implementation. Firstly, helicopter base price formulation was verified by 21 helicopters. Then, technology parameters were defined which effect base price value. After that, total base price was generated which contains R&D investments. Finally, the methodology was implemented on real samples, BELL429 composite shaft and Sikorsky UH-60 composite tail cone, in order to show that the methodology can be used as a practical tool for decision makers.
Subject Keywords
Helicopters.
,
Helicopter industry.
,
Helicopter industry
URI
http://etd.lib.metu.edu.tr/upload/12617767/index.pdf
https://hdl.handle.net/11511/23966
Collections
Graduate School of Natural and Applied Sciences, Thesis
Suggestions
OpenMETU
Core
A Support vector regression method for conceptual cost estimate of construction projects
Yolasığmaz, İsmet Berki; Sönmez, Rifat; Department of Civil Engineering (2015)
Conceptual cost estimate is very important for initial project decisions when the design information is limited and the scope is not finalized at the early stages of the construction projects. It has serious effects on planning, design, cost management and budgeting. Therefore, the decision makers should be as accurate as possible while estimating the conceptual cost at the initial stage since a misestimation on the conceptual cost may lead to serious problems during feasibility analysis or at the later sta...
COMPARATIVE STRUCTURAL OPTIMIZATION STUDY OF COMPOSITE AND ALUMINUM HORIZONTAL TAIL PLANE OF A HELICOPTER
Arpacıoğlu, Bertan; Kayran, Altan (2019-11-11)
This work presents structural optimization studies of aluminum and composite material horizontal tail plane of a helicopter by using MSC. NASTRAN SOL200 optimization capabilities. Structural design process starts from conceptual design phase, and structural layout design is performed by using CATIA. In the preliminary design phase, study focuses on the minimum weight optimization with multiple design variables and similar constraints for both materials. Aerodynamic load calculation is performed using ANSYS ...
Site specific design optimization of a horizontal axis wind turbine based on minimum cost of energy
Sağol, Ece; Uzol, Oğuz; Department of Aerospace Engineering (2010)
This thesis introduces a design optimization methodology that is based on minimizing the Cost of Energy (COE) of a Horizontal Axis Wind Turbine (HAWT) that is to be operated at a specific wind site. In the design methodology for the calculation of the Cost of Energy, the Annual Energy Production (AEP) model to calculate the total energy generated by a unit wind turbine throughout a year and the total cost of that turbine are used. The AEP is calculated using the Blade Element Momentum (BEM) theory for wind ...
Comparison of continuous and pulsed pump and treat for mass transfer limited aquifers
Aksoy, Ayşegül (2004-01-01)
On efficient use of simulated annealing in complex structural optimization problems
Hasançebi, Oğuzhan (Springer Science and Business Media LLC, 2002-01-01)
The paper is concerned with the efficient use of simulated annealing (SA) in structural optimization problems of high complexity. A reformulation of the working mechanism of the Boltzmann parameter is introduced to accelerate and enhance the general productivity of SA in terms of convergence reliability. Two general and complementary parameters, referred as "weighted Boltzmann parameter" and "critical Boltzmann parameter," are proposed, Several alternative methodologies are suggested for these two parameter...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
G. Kara, “Developing an investment decision methodology for helicopter systems related to technology factor and base price,” M.S. - Master of Science, Middle East Technical University, 2014.