An Optimal Design of Joint Stiffness on First Order Analysis (FOA) : A Trial of Optimization Method Based on Radial Basic Function Network

2004 ◽  
Vol 2004.14 (0) ◽  
pp. 348-350
Author(s):  
Yasuaki TSURUMI ◽  
Masao ARAKAWA ◽  
Tatsuyuki AMAGO ◽  
Toshiaki NAKAGAWA
Keyword(s):  
Optimal Design ◽  
Joint Stiffness ◽  
Optimization Method ◽  
Basic Function ◽  
Order Analysis ◽  
First Order ◽  
Function Network

Modular Structural Component Design Using the First Order Analysis and Decomposition-Based Assembly Synthesis

2001 ◽  
Author(s):  
Onur L. Cetin ◽  
Kazuhiro Saitou ◽  
Hidekazu Nishigaki ◽  
Shinji Nishiwaki ◽  
Tatsuyuki Amago ◽  
...  
Keyword(s):  
Optimization Method ◽  
Two Dimensional ◽  
Order Analysis ◽  
First Order ◽  
Automotive Body ◽  
Automated Method ◽  
Trade Offs ◽  
Component Design ◽  
Module Geometry ◽  
Topology Optimization Method

Abstract This paper discusses an automated method for designing modular components that can be shared within multiple structural products, such as automotive bodies for sibling vehicles. The method is an extension of the concept of decomposition-based assembly synthesis. A beam-based topology optimization method, originally developed for First Order Analysis (FOA) of the automotive body structures, is utilized in order to obtain the “base” structures subject to decomposition. It is expected that the method will facilitate the early decisions on module geometry in automotive body structures, by enhancing the capability of the FOA system. Several case studies with two-dimensional structures are reported to demonstrate the effectiveness of the proposed method. The results indicate that two structures optimized for a similar, but slightly different boundary loading conditions are successfully decomposed to contain a component that can be shared by the structures. Several Pareto optimal decompositions are presented to illustrate the trade-offs among multiple decomposition criteria, with different weights for each objective function.

Optimal design of planar frames based on stability criterion using first-order analysis

2006 ◽  
Vol 28 (13) ◽  
pp. 1780-1786 ◽  
Author(s):  
Luisa María Gil-Martín ◽  
Enrique Hernández-Montes ◽  
Mark Aschheim
Keyword(s):  
Optimal Design ◽  
Stability Criterion ◽  
Order Analysis ◽  
First Order ◽  
Planar Frames

An Optimal Design Method in First Order Analysis : Topology Optimization Based on Beam and Panel Elements

2001 ◽  
Vol 2001.10 (0) ◽  
pp. 118-121
Author(s):  
Shinji Nishiwaki ◽  
Hidekazu Nishigaki ◽  
Yasuaki Tsurumi ◽  
Yoshio Kojima ◽  
Noboru Kikuchi
Keyword(s):  
Topology Optimization ◽  
Optimal Design ◽  
Design Method ◽  
Order Analysis ◽  
First Order ◽  
Optimal Design Method

An Optimal Design Method in First Order analysis : Shape optimization based on the response surface methodology

2001 ◽  
Vol 2001.10 (0) ◽  
pp. 128-129
Author(s):  
Tatsuyuki AMAGO ◽  
Hidekazu NISHIGAKI ◽  
Shinji NISHIWAKI ◽  
Yoshio KOJIMA ◽  
Noboru KIKUCHI
Keyword(s):  
Response Surface Methodology ◽  
Optimal Design ◽  
Shape Optimization ◽  
Response Surface ◽  
Design Method ◽  
Order Analysis ◽  
First Order ◽  
Optimal Design Method

First Order Analysis for Automotive Body Structure Design

2000 ◽  
Author(s):  
Hidekazu Nishigaki ◽  
Shinji Nishiwaki ◽  
Tatsuyuki Amago ◽  
Noboru Kikuchi
Keyword(s):  
Optimization Method ◽  
Structure Design ◽  
Optimal Designs ◽  
Body Structure ◽  
Analysis Model ◽  
Microsoft Excel ◽  
Order Analysis ◽  
First Order ◽  
Automotive Body ◽  
Basic Ideas

Abstract The concept of Computer Aided Engineering (CAE) was first proposed by J. Lemon at SDRC, and has been widely accepted in automotive industries. CAE numerically estimates the performance of automobiles and proposes alternative ideas that lead to the higher performance without building prototypes. However, most automotive designers cannot directly utilize CAE since specific well-trained engineers are required to achieve sophisticated operations. Moreover, CAE requires a huge amount of time and many modelers to construct an analysis model. In this paper, we propose a new concept of CAE, First Order Analysis (FOA), in order to overcome these problems and to quickly obtain optimal designs. The basic ideas include (1) graphic interfaces for automotive designers using Microsoft/Excel (2) use of sophisticated formulations based on the theory of mechanics of material, (3) the topology optimization method. Further, some prototypes of software are presented to confirm the method for FOA presented here.

First Order Analysis for Automotive Designs

2001 ◽  
Author(s):  
Yoshio Kojima ◽  
Hidekazu Nishigaki ◽  
Hideki Sugiura ◽  
Shinji Nishiwaki ◽  
Noboru Kikuchi
Keyword(s):  
Optimization Method ◽  
Order Analysis ◽  
First Order ◽  
Mechanics Of Materials ◽  
Complex Functions ◽  
Reduce Development Time ◽  
New Type ◽  
Basic Ideas ◽  
Prototype Software ◽  
Structural Mechanisms

Abstract In current automotive development, innovations to reduce development time and to use a virtual prototype have been numerous and progressive. Computer Aided Engineering (CAE) has played an important role in these innovations. CAE numerically estimates the performance of automobiles and proposes alternative ideas that lead to higher performance without building physical prototypes. However, current CAE can not usually be used at the initial design phase due to their difficult, and complex functions and characteristics. In this paper, we propose a new type of CAE, First Order Analysis (FOA). The basic ideas include: (1) graphic interfaces using Microsoft /Excel to achieve a product-oriented analysis, (2) use of mechanics of materials to provide useful information regarding structural mechanisms, and (3) a topology optimization method using function oriented elements. Also, some prototype software is presented to confirm the applicability of method presented here to the automotive designs.

Foundation Plate Optimization

2015 ◽  
Vol 769 ◽  
pp. 81-84
Author(s):  
Katarina Tvrda
Keyword(s):  
Optimal Design ◽  
Optimization Method ◽  
Minimum Volume ◽  
Optimization Analysis ◽  
First Order ◽  
Foundation Plate ◽  
The Individual

This paper deals with some problem on thickness of a plate rested on Winkler ́s foundation using the first order optimization method, while maintaining different restrictive conditions. The optimization analysis is based on a reduction of the thickness in the individual points. The aim is to obtain a minimum volume of the foundation plate. Finally some results of optimal design are presented.

Structural Topology Optimization Using Function-Oriented Elements Based on the Concept of First Order Analysis

2003 ◽  
Author(s):  
Akihiro Takezawa ◽  
Shinji Nishiwaki ◽  
Kazuhiro Izui ◽  
Masataka Yoshimura
Keyword(s):  
Topology Optimization ◽  
Mechanical Design ◽  
Optimization Method ◽  
Structural Topology Optimization ◽  
Structural Topology ◽  
Order Analysis ◽  
First Order ◽  
Design Engineers ◽  
Optimization Methodology ◽  
And Function

Computer Aided Engineering (CAE) has been successfully utilized in mechanical industries, but few mechanical design engineers use CAE tools that include structural optimization, since the development of such tools has been based on continuum mechanics that limit the provision of useful design suggestions at the initial design phase. In order to mitigate this problem, a new type of CAE based on classical structural mechanics, First Order Analysis (FOA), has been proposed. This paper presents the outcome of research concerning the development of a structural topology optimization methodology within FOA. This optimization method is constructed based on discrete and function-oriented elements such as beam and panel elements, and sequential convex programming. In addition, examples are provided to show the utility of the methodology presented here for mechanical design engineers.

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