Shape optimization of castings by using successive response surface methodology

Gustafsson, Erik; Strömberg, Niclas

doi:10.1007/s00158-007-0114-6

Cited by 11 publications

(4 citation statements)

References 20 publications

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“…The problem in (37) is now solved by performing a DoE procedure and setting up corresponding RBFs which in turn define a new optimization problem that is solved using a global search with a genetic algorithm and a local search with sequential linear and/or quadratic programming. First, a set of sampling points are generated by successive linear response surface optimization of the problem in (37) using four successive iterations with automatic panning and zooming (Gustafsson and Strömberg 2008). This screening generates 12 sampling points according to Fig.…”

Section: Optimization Examplesmentioning

confidence: 99%

Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias

Amouzgar

Strömberg

2016

Struct Multidisc Optim

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In order to obtain a robust performance, the established approach when using radial basis function networks (RBF) as metamodels is to add a posteriori bias which is defined by extra orthogonality constraints. We mean that this is not needed, instead the bias can simply be set a priori by using the normal equation, i.e. the bias becomes the corresponding regression model. In this paper we demonstrate that the performance of our suggested approach with a priori bias is in general as good as, or even for many test examples better than, the performance of RBF with a posteriori bias. Using our approach, it is clear that the global response is modelled with the bias and that the details are captured with radial basis functions. The accuracy of the two approaches are investigated by using multiple test functions with different degrees of dimensionality. Furthermore, several modeling criteria, such as the type of radial basis functions used in the RBFs, dimension of the test functions, sampling techniques and size of samples, are considered to study their affect on the performance of the approaches. surrogate based design optimization is also demonstrated by solving an established engineering benchmark of a welded beam and another benchmark for different sampling sets generated by successive screening, random, Latin hypercube and Hammersley sampling, respectively. The results obtained by evaluation of the performance metrics, the modeling criteria and the presented optimal solutions, demonstrate promising potentials of our RBF with a priori bias, in addition to the simplicity and straight-forward use of the approach.

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Section: Optimization Examplesmentioning

confidence: 99%

Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias

Amouzgar

Strömberg

2016

Struct Multidisc Optim

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“…Metode ini dikembangkan oleh Box dan Wilson tahun 1951 dan telah digunakan secara luas dalam manufaktur diantaranya: penentuan parameter desain (Khuri,2010), multibody system(Etman, 1997), optimisasi pembentukan sheetmetal (Jansson, 2005), optimisasi crashworthiness (Redhe, 2004), optimisasi sudut pengecoran (Gustafsson, 2008).…”

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PENENTUAN POLA KELELAHAN FISIK PADA PEROKOK AKTIF DENGAN MENGGUNAKAN METODE RESPONSE SURFACE METHODOLOGY (Studi Kasus: Mahasiswa PS. Teknik Industri UIN Sunan Kalijaga)

Farihah

2016

Teknik Industri

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AbstrakPenelitian ini bertujuan untuk mengidentifikasi pola kelelahan fisik pada perokok aktif baik di beban kerja ringan, menengah dan beban kerja yang berat dengan faktor suhu dan cahaya. Response Permukaan Metodologi ( RSM ) adalah kumpulan teknik statistik dan matematika yang berguna untuk evaluasi hubungan yang ada pada beberapa faktor kuantitatif terhadap variabel respon. Berdasarkan hasil pengolahan data pada beban kerja ringan dan beban kerja menengah memiliki fungsi pola pelana. Sedangkan pada beban kerja berat memiliki fungsi respon permukaan minimum. Keyword: RSM; workload PendahuluanHampir 1 juta milyar khususnya laki-laki merokok dengan prosentase 35% berada di negara maju, 50% tinggal di negara berkembang dan sisanya berada di negara miskin. Sedangkan perempuan memiliki angka yang tidak jauh berbeda yakni 250 juta dengan 22% berada di negara maju, 9% negara berkembang. Rendahnya tingkat konsumsi tembakau pada perempuan tidak mencerminkan kesadaran akan kesehatan, namun lebih kepada tradisi sosial dan rendahnya pendapatan ekonomi pada perempuan.

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“…The SSM approach has also been used in design optimization studies other than automotive structural design. Gustafsson and Stro¨mberg 38 used SSM to perform shape optimization of castings. Zhang et al 39 used SSM for identification of material parameters of high-strength steel under impact loading.…”

Section: Introductionmentioning

confidence: 99%

Design optimization of an automobile torque arm using global and successive surrogate modeling approaches

Acar

Tüten

Güler

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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The design of lightweight automotive structures has become a prevalent practice in the automotive industry. This study focuses on design optimization of an automobile torque arm subjected to cyclic loading. Starting from an available initial design, the shape of the torque arm is optimized for minimum weight such that the fatigue life of the torque arm does not fall below that of the initial design and the maximum von Mises stress developed in the torque arm does not exceed that of the initial design. The stresses are computed using ANSYS finite element software, and the fatigue life is calculated using the Smith–Watson–Topper model. Surrogate-based optimization approach is used to reduce the computational cost. Optimization results based on global surrogate modeling and successive surrogate modeling approaches are compared. It is found that the successive surrogate modeling approach results in 28.7% weight reduction for the torque arm, whereas the global surrogate modeling approach results in 25.7% weight saving for the torque arm.

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Shape optimization of castings by using successive response surface methodology

Cited by 11 publications

References 20 publications

Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias

Radial basis functions as surrogate models with a priori bias in comparison with a posteriori bias

PENENTUAN POLA KELELAHAN FISIK PADA PEROKOK AKTIF DENGAN MENGGUNAKAN METODE RESPONSE SURFACE METHODOLOGY (Studi Kasus: Mahasiswa PS. Teknik Industri UIN Sunan Kalijaga)

Design optimization of an automobile torque arm using global and successive surrogate modeling approaches

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