Please use this identifier to cite or link to this item:
Title: Optimization of Shapes of Shell Structures using FEM as analysis tool
Researcher: Alapati, Mallika
Guide(s): Rao, N V Ramana
Keywords: Analysis
Upload Date: 20-May-2014
University: Jawaharlal Nehru Technological University, Hyderabad
Completed Date: 2013
Abstract: The present work deals with arriving at the optimum shapes of structures with respect to thickness, shape, topology optimization treating them separately and also by combining them. The targets are achieved by integrating geometric modeling, structural analysis,sensitivity analysis and built-in optimization modules.The First part of the thesis aims on optimization based on hickness newlineand shape. The illustrative examples considered are the Shell structures newlineobtained by inverse technique, cylindrical shells and examples of straight and curved forms of box girder bridges. Inverse technique is the method in which the static analysis is performed and the hanging model is created from the deflection profile which in turn is inverted to get deflection free model as a first step of optimization. These inverse models are further optimized for various objective functions such as minimizing the structural volume, minimizing the weighted frequency etc as single newlineobjective optimization. Four cases of support conditions are considered for optimizing the respective inverse models. Cylindrical shells are considered for three cases of support conditions for the same objective functions. Structural Energy norms are calculated for each case and found to be within user specified limits. The second part of the thesis deals with the case of optimization, the topology optimization. This part of the thesis concentrates on optimum shapes of shell structures obtained by inverse technique for four support.
Pagination: 172 p.
Appears in Departments:Faculty of Civil Engineering

Files in This Item:
File Description SizeFormat 
01_title.pdfAttached File87.33 kBAdobe PDFView/Open
02_dedication.pdf168.44 kBAdobe PDFView/Open
03_declaration.pdf64.16 kBAdobe PDFView/Open
04_certificate.pdf70.46 kBAdobe PDFView/Open
05_acknowledgement.pdf64.77 kBAdobe PDFView/Open
06_abstract.pdf71.51 kBAdobe PDFView/Open
07_contents.pdf105.13 kBAdobe PDFView/Open
08_list of tables & figures.pdf94.45 kBAdobe PDFView/Open
09_chapter 1.pdf102.03 kBAdobe PDFView/Open
10_chapter 2.pdf127.5 kBAdobe PDFView/Open
11_chapter 3.pdf2.52 MBAdobe PDFView/Open
12_chapter 4.pdf4.58 MBAdobe PDFView/Open
13_chapter 5.pdf1.81 MBAdobe PDFView/Open
14_chapter 6.pdf100.72 kBAdobe PDFView/Open
15_references.pdf230.53 kBAdobe PDFView/Open

Items in Shodhganga are protected by copyright, with all rights reserved, unless otherwise indicated.

Altmetric Badge: