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Topological Optimization of Thin Elastic Metamaterial Plates for Ultrawide Flexural Vibration Bandgaps by Gengwang Yan; Song Yao; Yingli Li; Wenxi Zhou is a Engineering article available to read on EtoBox.
What is Topological Optimization of Thin Elastic Metamaterial Plates for Ultrawide Flexural Vibration Bandgaps about?
The properties of bandgaps (BGs) for manipulating elastic/acoustic waves are highly determined by the spatial distribution of materials in the primitive unit cell. In this work, the topological optimization strategy is implemented to design thin elastic metamaterial plates to broaden the total relative width of flexural vibration bandgaps (FVBGs). It is formulated based on the adaptive genetic algorithm (AGA) and solved using the improved fast plane wave expansion method (IFPWEM), which can contribute to improving the efficiency of optimization. The effects of initial designs and material volume fraction constraints on the optimization are discussed in detail. Based on the optimized solutions evolved from Initialization IV and volume fraction constraint f 0 = 0.25, the wave propagation (iso-frequency contours, the phase, and group velocities) is utilized to investigate the physical mechanisms. The numerical and experimental results of the finite-size lattices composed of optimized unit cells demonstrate that out-of-plane flexural waves can be transmitted or prohibited, which is in perfect match with the predicted results of band structures. Additionally, the present methodology is
Who reads Topological Optimization of Thin Elastic Metamaterial Plates for Ultrawide Flexural Vibration Bandgaps?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Gengwang Yan; Song Yao; Yingli Li; Wenxi Zhou
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)