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Layout optimization of box girder with RBF-NNM-APSO algorithm

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Abstract

The layout optimization problem of complex box girder structure is solved with a new method RBF-NNM-APSO formed with the digital neural network model (NNM) of radial basis function (RBF) and adaptive particle swarm optimization (APSO) algorithm in this paper. The optimized surrogate model is proposed and applied to the configuration optimization of heavy-duty box girder of casting crane for improving the mechanical properties of the optimized object and expediting proceedings. First, the parametric command flow finite element numerical model of box girder is established. The RBF neural network is trained by constructing a mixed orthogonal experimental table of parameters, and the relationship between the design variables and the maximum stress and deformation is established. Subsequently, the trained RBF neural network design scheme is optimized by APSO algorithm. Finally, on the premise of not increasing the total mass, a new layout form of box girder is obtained.

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Abbreviations

X :

Variable matrix

X i :

Particle position

V i :

Particle speed

P i :

Current position of particle

P gb :

Current best position of population

v ij :

Velocity of particle

ω :

Inertia weight

H :

Radial basis vector

C j :

Center vector

B :

Base width vector of RBF neural network

W :

Weight vector

y m :

Output of the network

E :

Performance index function of RBF network

η :

Learning efficiency

α :

Momentum factor

Net1:

Design variable and the maximum stress

Net2:

Design variable and the maximum deformation

σ s :

Yield strength of the material

σ b :

Tensile strength of the material

[Y]:

Allowable deformation of box girder

M t :

Quality before optimization

M :

Quality after optimization

Lb [X]:

Lower bound of a variable

Ub [X]:

Upper bound of a variable

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Acknowledgments

This work was supported by Shanxi provincial Key Research and Development Project, China (201903D121067), the National Natural Science Foundation of China (51478290) and the Fund for Shanxi ‘1331 Project’ Key Subjects Construction [1331KSC].

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Correspondence to Yixiao Qin.

Additional information

Junle Yang is a graduate student of Taiyuan University of Science and Technology. His research includes structure optimization and hoisting machinery.

Yixiao Qin is a Professor and doctoral supervisor in Taiyuan University of Science and Technology. He received the Ph.D. from Shanghai Institute of Applied Mathematics and Mechanics. His research interests include optimization design of engineering structure.

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Yang, J., Qin, Y. & Jiao, Q. Layout optimization of box girder with RBF-NNM-APSO algorithm. J Mech Sci Technol 36, 5575–5585 (2022). https://doi.org/10.1007/s12206-022-1021-x

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  • DOI: https://doi.org/10.1007/s12206-022-1021-x

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