Optimum design of a multi-functional acoustic metasurface using topology optimization based on Zwicker’s loudness model

2018 ◽  
Vol 331 ◽  
pp. 116-137 ◽  
Author(s):  
Kohei Miyata ◽  
Yuki Noguchi ◽  
Takayuki Yamada ◽  
Kazuhiro Izui ◽  
Shinji Nishiwaki
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Loudness Model

The Layout Optimization for Axial Stiffness of a Flexplate Disk with Weight and Inertial Moment Constraints

2013 ◽  
Vol 655-657 ◽  
pp. 630-635 ◽  
Author(s):  
Da Ke Zhang ◽  
Chong Wang ◽  
Yi Chao Yang ◽  
Han He
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Automatic Transmission ◽  
Torque Converter ◽  
Layout Optimization ◽  
Axial Stiffness ◽  
Manufacturing Cost ◽  
Mechanical Component ◽  
Inertial Moment

A flexplate is a mechanical component that couples the crankshaft to the torque converter of a car with automatic transmission. A higher axial stiffness is one of significant requirements for it in order to ensure its performance. In this paper an optimum design of the flexplate disk is described that maximizes the axial stiffness of the flexplate disk with weight and inertial moment constraints. The strategy for optimizing the layout of the disk is to perform topology optimization first then position optimization. The relation is presented which shows the variation of axial stiffness with respect to changes of the number, shape and position of the holes on the flexplate disk. The research shows that the shape of the hole punched on the disk does not affect the axial stiffness greatly. Thus, the manufacturing cost should be considered first in the optimum design of the flexplate disk

Numerical and Experimental Verification of Optimum Design Obtained from Topology Optimization

2003 ◽  
Author(s):  
Hui Wang ◽  
Zheng-Dong Ma ◽  
Noboru Kikuchi ◽  
Christophe Pierre ◽  
Basavaraju Raju
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Experimental Verification

Topology optimization for acoustic-structural coupled metasurface based on Zwicker's loudness model

2016 ◽  
Vol 2016.29 (0) ◽  
pp. 4_112
Author(s):  
Kohei MIYATA ◽  
Yuki NOGUCHI ◽  
Takayuki YAMADA ◽  
Kazuhiro IZUI ◽  
Shinji NISHIWAKI
Keyword(s):  
Topology Optimization ◽  
Loudness Model

A FULLY STRESSED DESIGN METHOD TO DETERMINE THE OPTIMUM STRUT-AND-TIE MODEL FOR BEAM–COLUMN CONNECTIONS

2012 ◽  
Vol 09 (03) ◽  
pp. 1250035 ◽  
Author(s):  
FATİH MEHMET ÖZKAL ◽  
HABİB UYSAL
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Design Method ◽  
Strut And Tie ◽  
Fully Stressed Design ◽  
As Stress ◽  
Strut And Tie Model ◽  
Parameter Values ◽  
Element Removal ◽  
Stressed Design

Topology optimization and strut-and-tie model methods have a remarkable success in the detailing of reinforced concrete structures, especially for discontinuity regions of the beam–column connections. However, it has always been complicated to determine an optimum design throughout all the offers of an optimization process, since it is not obvious which of the decision variables should be considered in order to select the optimum design. This paper presents the application of a new selection method on topology optimization and strut-and-tie modeling of the beam–column connections. A performance index formulation assists the selection of the optimum design from the process by considering the fully stressed design concept unlikely other performance indices. Former indices take just one of the structural criterions into consideration such as stress, strain energy, displacement, etc. The efficiency and capability of the approach have been demonstrated by the comparison of element removal criterions and different parameter values on several bidimensional design examples.

An Optimum Design Method for a Thermal-Fluid Device Incorporating Multiobjective Topology Optimization With an Adaptive Weighting Scheme

2018 ◽  
Vol 140 (3) ◽  
Author(s):  
Yuki Sato ◽  
Kentaro Yaji ◽  
Kazuhiro Izui ◽  
Takayuki Yamada ◽  
Shinji Nishiwaki
Keyword(s):  
Topology Optimization ◽  
Heat Exchange ◽  
Pressure Drop ◽  
Optimum Design ◽  
Heat Sink ◽  
Pareto Front ◽  
Design Method ◽  
Optimization Method ◽  
Microchannel Heat Sink ◽  
Topology Optimization Method

This paper proposes an optimum design method for a two-dimensional microchannel heat sink under a laminar flow assumption that simultaneously provides maximal heat exchange and minimal pressure drop, based on a topology optimization method incorporating Pareto front exploration. First, the formulation of governing equations for the coupled thermal-fluid problem and a level set-based topology optimization method are briefly discussed. Next, an optimum design problem for a microchannel heat sink is formulated as a bi-objective optimization problem. An algorithm for Pareto front exploration is then constructed, based on a scheme that adaptively determines weighting coefficients by solving a linear programming problem. Finally, in the numerical example, the proposed method yields a Pareto front approximation and enables the analysis of the trade-off relationship between heat exchange and pressure drop, confirming the utility of the proposed method.

Study on Topology Optimum Design of Baffle of Scraper Conveyer

2011 ◽  
Vol 228-229 ◽  
pp. 96-100
Author(s):  
Yan Hui Qie ◽  
Bo Liu ◽  
Xiu Hong Wang ◽  
Hai Peng Jia ◽  
Jian Peng Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Topology Optimization ◽  
Conceptual Design ◽  
Optimum Design ◽  
Homogenization Method ◽  
Homogenization Theory ◽  
Design Stage ◽  
Mean Compliance ◽  
Selection Of

At present the study on the application of the topology optimum design in scraper conveyor is still under development. In this paper the topology optimization based on the homogenization method is applied to the design of the baffle on the scraper conveyer, which can provide a valuable conceptual design scheme for the selection of the baffle pattern. In conjunction with the homogenization theory and Finite Element Method (FEA), the mathematical models for designing the baffle by the minimizing mean compliance are developed in this paper. By applying the topology optimum design to the baffle, the topology optimization based on the homogenization method is proved to be reliable and practical at the conceptual design stage of baffle.

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