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Topology optimization-enabled destructive interference metastructure design for flexural wave manipulation
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DOI：10.1016/j.compstruc.2025.108031.png)
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Abstract
En 中文
Destructive interference-based mechanical metamaterials hold promise for manipulating flexural waves in host structures, demonstrating superior performance in mitigating mechanical vibrations over a broad frequency range. This paper presents an embedded phononic structure designed to attenuate flexural wave propagation in beam structures, using the topology optimization method. First, the theoretical framework for flexural wave propagation in a beam structure is derived. Then, an optimization objective is formulated to manipulate the flexural wavelength, and the solid isotropic material penalization (SIMP) method is employed to optimize the material distribution of the beam cross-section. Subsequently, an embedded phononic structure based on destructive interference is designed to control flexural waves in the beam. Finally, numerical simulations are conducted to evaluate the performance of the proposed method in attenuating flexural wave propagation. The results confirm the effectiveness of the embedded phononic structure for bending wave mitigation in beam structures. This study represents a novel approach to designing mechanical vibration absorbers based on destructive interference for flexural wave manipulation with assistance of topology optimization method.
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