Design scaling of aeroballistic range models

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2004

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Kutluay, Ümit

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The aim of this thesis is to develop a methodology for obtaining an optimum configuration for the aeroballistic range models. In the design of aeroballistic range models, there are mainly three similarity requirements to be matched between the model and the actual munition: external geometry, location of the centre of gravity and the ratio of axial mass moment of inertia to the transverse mass moment of inertia. Furthermore, it is required to have a model with least possible weight, so that the required test velocities can be obtained with minimum chamber pressure and by use of minimum propellant while withstanding the enormous launch accelerations. This defines an optimization problem: to find the optimum model internal configuration and select materials to be used in the model such that the centre of gravity location and the inertia ratio are matched as closely as possible while the model withstands the launch forces and has minimum mass. To solve this problem a design methodology is devised and an optimization code is developed based on this methodology. Length, radius and end location of an optimum cylinder which has to be drilled out from the model are selected as the design variables for the optimization problem. Builtاin functions from the Optimization Toolbox of Matlab® are used in the optimization routine, and also a graphical user interface is designed for easy access to the design variables. The developed code is a very useful tool for the designer, although the results are not meant to be directly applied to the final product, they form the starting points for the detailed design.

Subject Keywords

Mechanical engineering.

URI

http://etd.lib.metu.edu.tr/upload/12605698/index.pdf
https://hdl.handle.net/11511/14770

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Ü. Kutluay, “Design scaling of aeroballistic range models,” M.S. - Master of Science, Middle East Technical University, 2004.