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Purpose <p>An optimized design model for the three-component locally resonant phononic crystal (TCLRPC) is proposed by using artificial neural networks and genetic algorithms.</p> Methods <p>Through this optimized design model, three-component material capable of producing low-frequency wide band gaps are selected from existing civil engineering materials. Besides, based on the range of dominant frequency observed ground vibration arising from high-speed trains (HSTs), and combined with the selected three component materials, an optimized TCLRPC is designed, with a bandgap range that can fully cover the dominant range of HST-induced vibration frequency.</p> Results <p>The optimized TCLRPC can effectively mitigate and control HST-induced vibration, and the ground vibration attenuation can reach about 70% after adopting the optimized TCLRPCs.</p> Conlusion <p>The optimized design model can effectively select three-component materials that meet the requirements based on the main frequency of vibration, providing a new method for material design of TCLPRC.</p>

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Optimization Design and Vibration Reduction Characteristics of Three-Component Local Resonance Phononic Crystals

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Li Feng,
  • Jia Luo,
  • Dawei Shi,
  • Huirong Hu,
  • Haizhong Zheng

摘要

Purpose

An optimized design model for the three-component locally resonant phononic crystal (TCLRPC) is proposed by using artificial neural networks and genetic algorithms.

Methods

Through this optimized design model, three-component material capable of producing low-frequency wide band gaps are selected from existing civil engineering materials. Besides, based on the range of dominant frequency observed ground vibration arising from high-speed trains (HSTs), and combined with the selected three component materials, an optimized TCLRPC is designed, with a bandgap range that can fully cover the dominant range of HST-induced vibration frequency.

Results

The optimized TCLRPC can effectively mitigate and control HST-induced vibration, and the ground vibration attenuation can reach about 70% after adopting the optimized TCLRPCs.

Conlusion

The optimized design model can effectively select three-component materials that meet the requirements based on the main frequency of vibration, providing a new method for material design of TCLPRC.