scholarly journals 1111 Construction of a New Boundary Tracking Type Level-set Topology Optimization Method

2013 ◽  
Vol 2013.23 (0) ◽  
pp. _1111-1_-_1111-8_
Author(s):  
Shintaro YAMASAKI ◽  
Atsushi KAWSMOTO ◽  
Tsuyoshi NOMURA ◽  
Kikuo FUJITA
Keyword(s):  
Topology Optimization ◽  
Level Set ◽  
Optimization Method ◽  
Boundary Tracking ◽  
Topology Optimization Method

Electromagnetic Design of In-Vehicle Reactor Using a Level-Set Based Topology Optimization Method

2014 ◽  
Author(s):  
Shintaro Yamasaki ◽  
Atsushi Kawamoto ◽  
Akira Saito ◽  
Masakatsu Kuroishi ◽  
Kikuo Fujita
Keyword(s):  
Topology Optimization ◽  
Level Set ◽  
Design Problem ◽  
Design Method ◽  
Reactor Core ◽  
Optimization Method ◽  
State Variables ◽  
Boundary Tracking ◽  
Level Set Function ◽  
Topology Optimization Method

In this paper, we propose a level-set based topology optimization method for designing a reactor, which is used as a part of the DC-DC converter in electric and hybrid vehicles. Since it realizes a high-power driving motor and its performance relies on its component, i.e., reactor core, it is valuable to establish a reasonable design method for the reactor core. Boundary tracking type level-set topology optimization is suitable for this purpose, because the shape and topology of the target structure is clearly represented by the zero boundary of the level-set function, and the state variables are accurately computed using the zero boundary tracking mesh. We formulate the design problem on the basis of electromagnetics, and derive the design sensitivities. The derived sensitivities are linked with boundary tracking type level-set topology optimization, and as a result, a useful structural optimization method for the reactor core design problem is developed.

Displacement and Stress Constrained Topology Optimization

2013 ◽  
Author(s):  
Meisam Takalloozadeh ◽  
Krishnan Suresh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Level Set ◽  
Numerical Experiments ◽  
Optimization Method ◽  
Stress Constraints ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Topology Optimization Method

The objective of this paper is to demonstrate a topology optimization method subject to displacement and stress constraints. The method does not rely on pseudo-densities; instead it exploits the concept of topological level-set where ‘partial’ elements are avoided. Consequently: (1) the stresses are well-defined at all points within the evolving topology, and (2) the finite-element analysis is robust and efficient. Further, in the proposed method, a series of topologies of decreasing volume fractions are generated in a single optimization run. The method is illustrated through numerical experiments in 2D.

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