A systematic design of multifunctional lattice structures with energy absorption and phononic bandgap by topology and parameter optimization
Source abstract
Abstract
Lattice structure can realize excellent multifunctional characteristics because of its huge design space, and the cellular configuration directly affects the lattice structural performance and lightweight. A novel energy-absorbing multifunctional lattice structure with phononic bandgap is presented by topology and parameter optimization in this paper. First, the two-dimensional (2D) cellular configuration is lightweight designed by using independent continuous mapping (ICM) topology optimization method. The 2D cell is reconstructed by geometric parameters and rotated into a three-dimensional (3D) cell by using chiral shape to achieve bandgap. Subsequently, the surrogated model with energy absorption as the object and first-order natural frequency as the constraint is established to optimize a parametric 3D cell based on the Response Surface Methodology (RSM). Finally, the lattice structures are assembled with dodecagonal staggered arrangements to avoid the deformation interference among the adjacent cells. In addition, the lattice structural energy absorption and bandgap characteristics are analyzed and discussed. Compared to Kelvin lattice structure, the optimal lattice structure shows significant improvement in energy absorption efficiency. Besides, the proposed design also performs well in damping characteristics of the high-frequency and wide-bandgap. The lattice structural optimization design framework has great meaning to achieve the equipment structural lightweight and multi-function in the aerospace field.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Cellular and Composite Structures · Topology Optimization in Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, PR, China
College of Engineering, Peking University, Beijing, PR, China
Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, PR, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Beijing Municipality
References (72)
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