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Layout and sizing optimization of discrete truss based on continuum

Wu, Qinglong / Zhou, Qicai / Xiong, Xiaolei / Zhang, Richeng

Abstract A new method combined continuum topology with discrete truss is proposed for truss optimization. The optimized material distribution is obtained by means of continuum topology optimization and then transformed into initial truss. Based on the element principal stress and 8-neighborhood elements of continuum, force flow path extraction method is presented to obtain the initial truss layout. For section size optimization, criterion is deduced from a mathematical model by Lagrange multiplier method. Leveraging the free-form nature of continuum, this method can avoid the restriction of traditional ground structure. And it can achieve a better solution with less mass, smaller deformation and more uniform stress.

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Layout and sizing optimization of discrete truss based on continuum

Wu, Qinglong / Zhou, Qicai / Xiong, Xiaolei / Zhang, Richeng

Abstract A new method combined continuum topology with discrete truss is proposed for truss optimization. The optimized material distribution is obtained by means of continuum topology optimization and then transformed into initial truss. Based on the element principal stress and 8-neighborhood elements of continuum, force flow path extraction method is presented to obtain the initial truss layout. For section size optimization, criterion is deduced from a mathematical model by Lagrange multiplier method. Leveraging the free-form nature of continuum, this method can avoid the restriction of traditional ground structure. And it can achieve a better solution with less mass, smaller deformation and more uniform stress.

Layout and sizing optimization of discrete truss based on continuum

Wu, Qinglong / Zhou, Qicai / Xiong, Xiaolei / Zhang, Richeng

Abstract A new method combined continuum topology with discrete truss is proposed for truss optimization. The optimized material distribution is obtained by means of continuum topology optimization and then transformed into initial truss. Based on the element principal stress and 8-neighborhood elements of continuum, force flow path extraction method is presented to obtain the initial truss layout. For section size optimization, criterion is deduced from a mathematical model by Lagrange multiplier method. Leveraging the free-form nature of continuum, this method can avoid the restriction of traditional ground structure. And it can achieve a better solution with less mass, smaller deformation and more uniform stress.

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Title:

Layout and sizing optimization of discrete truss based on continuum

Contributors:

Wu, Qinglong (author) / Zhou, Qicai (author) / Xiong, Xiaolei (author) / Zhang, Richeng (author)

Published in:

International Journal of Steel Structures ; 17 ; 43-51

Publication date:

2017-03-01

Size:

9 pages

ISSN:

2093-6311 , 1598-2351

DOI:

https://doi.org/10.1007/s13296-016-0033-8

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Truss , Continuum , Topology optimization , SKO , Force flow path , Size optimization Engineering , Civil Engineering , Structural Mechanics , Materials Science, general

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