Shape optimization with the Biological Growth Method

Güneri, A. Alper


Shape optimization with the biological growth method: A parameter study
Tekkaya, AE; Guneri, A (1996-01-01)
Studies the effect of parameters controlling the biological growth method by applying it to the classical optimization problem of a plate with a central hole under biaxial stress state. It has been found that the optimization character of the method depends strongly on the so-called reference stress. Depending on the magnitude of this parameter either a local or global optimum is approached. A global optimum corresponds to the minimum possible v. Mises stress along the hole boundary (and hence in the plate)...
Shape Optimizations of Metallic Sheets Using a Multigrid Approach
Altinoklu, Askin; Karaova, Gokhan; Ergül, Özgür Salih (2017-09-27)
We present a novel multigrid approach for the shape optimizations of corrugated metallic sheets by using genetic algorithms (GAs) and the multilevel fast multipole algorithm (MLFMA). The overall mechanism is obtained by an efficient integration of GAs and MLFMA, while the optimizations are improved by applying multiple grids at different layers. We show that the multigrid approach provides more effective optimizations than the conventional no-grid optimizations that employ the discretization nodes directly....
Shape optimization of an excavator boom by using genetic algorithm
Uzer, Cevdet Can; Söylemez, Eres; Department of Mechanical Engineering (2008)
This study concerns with the automated structural optimization of an excavator boom. The need for this work arises due to the fact that the preparation of the CAD model, performing finite element analysis and model data evaluation are time consuming processes and require experienced man power. The previously developed software OptiBOOM, which generates a CAD model using a finite set of parameters and then performs a finite element analysis by using a commercial program has been modified. The model parameter...
Shape optimization of helicopter subfloor intersection element under crash loading
Türe, Mustafa Okan; Dağ, Serkan; Department of Mechanical Engineering (2017)
The aim of the crashworthiness is maintaining a survivable space for occupants and absorb crash energy as much as possible. The statistics showed that 85% of all rotorcraft accidents can be survivable. Thus, crashworthy design has direct effect on occupants' survival. This thesis analyses a longitudinal beam and lateral frame intersection point on helicopter subloor. Analysis is performed on ABAQUS Dynamic/Explicit solver. Analysis includes high deformation levels, self-contact and nonlinearities. 110 kg ma...
Shape recognition using orientational and morphological scale-spaces of curvatures
Akagündüz, Erdem (2015-10-01)
In this study, a scale-invariant representation for closed planar curves (silhouettes) is proposed. The orientations of all points within the Gaussian scale-space of the curve are extracted. This orientation scale-space is used to create the silhouette orientation image in which the positions of each pixel indicate the curve's pixel positions and scales, whereas the colour represents orientation. The representation is extracted for multiple levels of the morphological scale-space of the silhouette. The prop...
Citation Formats
A. A. Güneri, “Shape optimization with the Biological Growth Method,” Middle East Technical University, 1993.