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Seismic phononic crystals by elastodynamic Navier equation.

Dongwoo Lee1, Joo Hwan Oh2, In Seok Kang3

  • 1Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.

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Summary
This summary is machine-generated.

This study introduces seismic phononic crystals to block seismic waves, inspired by photonic crystals. This innovation could lead to advanced seismic-resistant structures and techniques.

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Area of Science:

  • Solid mechanics
  • Seismology
  • Materials science

Background:

  • Photonic crystals exhibit complete band gaps, preventing light propagation.
  • This concept is extended to seismic wave propagation in engineered materials.

Purpose of the Study:

  • To investigate the creation of complete band gaps for seismic body (P) and shear (S) waves.
  • To develop thinner, effective seismic phononic crystals.
  • To understand material property impacts on wave propagation.

Main Methods:

  • Exploiting the elastodynamic Navier equation for seismic phononic crystals.
  • Utilizing weak formulation for band structure analysis.
  • Estimating propagation length via evanescent modes and complex wave vectors.

Main Results:

  • Demonstrated the induction of complete band gaps for P and S seismic waves.
  • Developed a method to reduce the physical size of phononic crystals.
  • Analyzed the influence of material properties on wave propagation length and particle velocity.

Conclusions:

  • Seismic phononic crystals offer a novel approach to controlling seismic wave propagation.
  • The findings contribute to the development of advanced seismic-resistant technologies.
  • Further research can optimize material selection for enhanced seismic protection.