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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (5): 225225-225225.doi: 10.7527/S1000-6893.2021.25225

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Integrated layout and topology optimization of multi-component structural systems considering component shape-preserving design constraints

GUO Wenjie1, ZHU Jihong2, LUO Lilong1, CHANG Liang1   

  1. 1. Aircraft Strength Research Institute of China, Xi'an 710065, China;
    2. School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2021-01-06 Revised:2021-04-08 Published:2021-05-24
  • Supported by:
    Science and Technology Program of Guangdong Province (2019B090911003);National Research Project

Abstract: A formulation considering the shape-preserving design of components for the integrated layout and topology optimization design of a multi-component structural system is proposed. Based on the conventional integrated layout and topology optimization design of a multi-component structural system, the static strain energy of the movable component is defined to illustrate and measure its elastic deformation. To suppress the warping deformation of load-carrying components in the design of multi-component structural systems, the proposed static strain energy of the movable component is treated as a design constraint of the optimization model, also called shape-preserving design constraint of the movable component. The analytical design sensitivity of the shape-preserving design constraint of components to the topological design variable and the component layout design variable is given, the wane and wax relationship between the shape-preserving design constraint of the movable component and the global stiffness discussed, the influence of the shape-preserving design constraint of the movable component on its supporting structure studied, and the centroid position constraint of the structural system is introduced into the optimization design of the multi-component structural system considering component shape-preserving design constraints. By conducting numerical examples, we achieve the design results taking the shape-preserving design constraint of movable components, material usage fractions and centroid position constraint into account. The design results show that the proposed shape-preserving design constraint of movable components is effective in suppressing the elastic deformation of load-carrying components for the integrated layout and topology optimization design of multi-component structural systems. The desired shape-preserving design of movable components can be obtained using the proposed formulation.

Key words: topology optimization, layout optimization, multi-component structural system, shape-preserving, elastic strain energy, centroid position constraint

CLC Number: