STUDYING THE EFFECTS OF DESIGN PARAMETERS ON THE FINAL TOPOLOGY OF PLANAR STRUCTURES BY IMPROVED BI-DIRECTIONAL EVOLUTIONARY STRUCTURAL OPTIMIZATION METHOD

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SHABANI NODEHI SAEED; FALAHATGAR SEYED REZA; ANSARI REZA

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:5 Page(s): 29-38

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Title

STUDYING THE EFFECTS OF DESIGN PARAMETERS ON THE FINAL TOPOLOGY OF PLANAR STRUCTURES BY IMPROVED BI-DIRECTIONAL EVOLUTIONARY STRUCTURAL OPTIMIZATION METHOD

Author(s)

SHABANI NODEHI SAEED | FALAHATGAR SEYED REZA | ANSARI REZA | Issue Writer Certificate

Keywords

EVOLUTIONARY STRUCTURAL OPTIMIZATIONQ1

SOFT KILLQ1

LENGTH SCALE PARAMETERQ1

EVOLUTIONARY RATIOQ1

Abstract

Topology optimization of structure seeks to achieve the best material distribution in the Pre-determined design domain. In this paper, the effect of design parameters including LENGTH SCALE PARAMETER and evolutionary volume ratio in improved bi-directional EVOLUTIONARY STRUCTURAL OPTIMIZATION method with SOFT KILL approach is discussed. The main aim of this method is searching for the stiffest structure with a given volume of material using finite element method. At each iteration of finite element analysis, sensitivity number is calculated for each individual element in design domain and then converted to the nodal sensitivity number. With Filter Scheme and using length scale, an improved sensitivity number is defined. This number is used as a criterion for rating each element in design domain and determining the addition and elimination (remove) of elements. To increase the convergence of the optimization process, the accuracy of the new elemental sensitivity numbers is improved by considering the sensitivity history. This method is convergent and mesh-independent and there are no checkerboard patterns and local solutions in optimal topologies. Using three design samples, a cantilever and classical beam and Michell type structure, affecting factors will be discussed on the final design of the structure. Change of LENGTH SCALE PARAMETER produces various schemes in final structures in which, with increasing this parameter, more iteration is needed for convergent solution. Reducing evolutionary volume ratio forms different and even asymmetric topologies. Better optimized topologies are obtained with higher evolutionary volume ratios.

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APA: Copy

SHABANI NODEHI, SAEED, FALAHATGAR, SEYED REZA, & ANSARI, REZA. (2016). STUDYING THE EFFECTS OF DESIGN PARAMETERS ON THE FINAL TOPOLOGY OF PLANAR STRUCTURES BY IMPROVED BI-DIRECTIONAL EVOLUTIONARY STRUCTURAL OPTIMIZATION METHOD. MODARES MECHANICAL ENGINEERING, 16(5), 29-38. SID. https://sid.ir/paper/177928/en

Vancouver: Copy

SHABANI NODEHI SAEED, FALAHATGAR SEYED REZA, ANSARI REZA. STUDYING THE EFFECTS OF DESIGN PARAMETERS ON THE FINAL TOPOLOGY OF PLANAR STRUCTURES BY IMPROVED BI-DIRECTIONAL EVOLUTIONARY STRUCTURAL OPTIMIZATION METHOD. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(5):29-38. Available from: https://sid.ir/paper/177928/en

IEEE: Copy

SAEED SHABANI NODEHI, SEYED REZA FALAHATGAR, and REZA ANSARI, “STUDYING THE EFFECTS OF DESIGN PARAMETERS ON THE FINAL TOPOLOGY OF PLANAR STRUCTURES BY IMPROVED BI-DIRECTIONAL EVOLUTIONARY STRUCTURAL OPTIMIZATION METHOD,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 5, pp. 29–38, 2016, [Online]. Available: https://sid.ir/paper/177928/en

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