Issues of commercial optimization software development

Thomas, Harold; Zhou, Ming; Schramm, Uwe

doi:10.1007/s00158-002-0170-x

Cited by 54 publications

(17 citation statements)

References 11 publications

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“…The dynamic simulation-based design Downloaded by [Dalhousie University] at 10:10 26 December 2014 approach has been considered to be a very effective way to meet market demands. A number of works have been reported for the improvement of shockproof characteristics of small-scale products (Goyal et al, 1999;Lim and Low, 2002;Mishiro, 2002;Tee et al, 2003a,b;Yeh and Lai, 2004;Yu et al, 2004;Zhu, 2003;Zhu and Marcinkiewicz, 2005), and optimization methods by integrated manner of commercial engineering software were reported (Thomas et al, 2002).…”

Section: Introductionmentioning

confidence: 96%

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#

Kim¹,

Kum²,

Park³

2009

Mechanics Based Design of Structures and Machines

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In transportation and use environments, electronic appliances, especially those that are large and heavy, suffer many different types of mechanical shocks. Generally, to prevent damage to the products from severe shocks, various cushion materials used for packaging have been widely utilized. However, the external shape of electronic appliances is complex, and the mass distribution of the inside parts is unbalanced. Consequently, it is not easy when using empirical approaches to design the cushioning package to ensure that it has a high absorption of shock energy. In this study, experimental and analytical approaches have been used to propose an effective design process for the optimization of cushioning packages so that they have less volume and a greater cushioning ability. An examination of the optimization of cushioning package was conducted for a large-size refrigerator with a weight of more than 100 kg to demonstrate the usefulness of the proposed method; findings from the study show that the volume reduction of a package was as much as 22% with the reduction of maximum acceleration at 25%.

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Section: Introductionmentioning

confidence: 96%

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#

Kim¹,

Kum²,

Park³

2009

Mechanics Based Design of Structures and Machines

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“…When the design space in topology optimization is discretized using finite elements of small dimensions, the optimization algorithm usually forms the final solution -thin rod-like structures with low usability in the production process (Thomas, Zhou, and Schramm, 2002). Therefore, a new design space preprocessing methodology has been presented.…”

Section: Manufacturing Constraints Proceduresmentioning

confidence: 99%

Application of manufacturing constraints to structural optimization of thin-walled structures

Kuczek

2015

Engineering Optimization

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Topology optimization can be a very useful tool for creating conceptual designs for vehicles. Structures suggested by topology optimization often turn out to be difficult to implement in manufacturing processes. Presently, rail vehicle structures are made by welding sheet metal parts. This leads to many complications and increased weight of the vehicle. This article presents a new design concept for modern rail vehicle structures made of standardized, thin-walled, closed, steel profiles that fulfil the stress and manufacturing requirements. For this purpose, standard software for topology optimization was used with a new way of preprocessing the design space. The design methodology is illustrated by an example of the topology optimization of a freight railcar. It is shown that the methodology turns out to be a useful tool for obtaining optimal structure design that fulfils the assumed manufacturing constraints.

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“…When the design space of topological optimization is discretized by the finite elements of small dimensions, the optimization algorithm usually shapes the final solution in the form of thin rod structures with low usefulness for the production process (see Thomas et al (2002)). For that reason a new design space preprocessing procedure was proposed.…”

Section: Topology Optimization With Design Space Constraintsmentioning

confidence: 99%

Uniform crashworthiness optimization of car body for high-speed trains

Mrzygłód

Kuczek

2013

Struct Multidisc Optim

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The paper deals with a new uniform crashworthiness concept of car bodies optimization of high-speed trains. The design optimization was done from the point of view of structural protection of occupants' survival space. For the reason that it is impossible to find a highly probable scenario for the derailment, the authors decided to find the solution in the form of rigid frame structure (survival cells), which will provide safety space for the passengers.In the optimization example a typical passenger car body was divided into cells of approximately equal dimensions. The optimization problem was to minimize the mass of the structure with stress constraints. The survival cell was subjected to a sequence of high value loads. The loads are acting in an asynchronous way in three load directions what gives the optimized structure uniform crashworthiness.The optimization strategy consists of three stages. In the first step, the constant criterion surface algorithm (CCSA) of topology optimization is applied to find a preliminary solutions. For improving the manufacture properties of this solution, a new concept of design space constraints was proposed. The sizing optimization with evolutionary algorithms was used to define a thin-walled structure in the second step. For evolutionary optimization a standard procedure was employed. Finally, CCSA optimization algorithm was This paper was presented in the 9th World Congress on Structural and Multidisciplinary Optimization, International Society for Structural and Multidisciplinary Optimization, Shizuoka, Japan, 2011 M. Mrzygłód · T. Kuczek ( ) Institute of Rail Vehicles, Cracow University of Technology, al. Jana Pawła II 37, Kraków, M. Mrzygłód e-mail: mrzyglod@mech.pk.edu.pl applied again to remove excessive material from a car body structure. As the optimization result a new design proposition of a car body with multiple survival cells of high uniform stiffness was obtained. By maintaining passengers' survival space, the passive safety of a high-speed car body was significantly increased.

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Issues of commercial optimization software development

Cited by 54 publications

References 11 publications

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#

Application of manufacturing constraints to structural optimization of thin-walled structures

Uniform crashworthiness optimization of car body for high-speed trains

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Issues of commercial optimization software development

Cited by 54 publications

References 11 publications

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances#

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances#

Application of manufacturing constraints to structural optimization of thin-walled structures

Uniform crashworthiness optimization of car body for high-speed trains

Contact Info

Product

Resources

About

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#

Effective Design of Cushioning Package to Improve Shockproof Characteristics of Large-Sized Home Appliances^#