首页|Elastic wave insulation and propagation control based on the programmable curved-beam periodic structure
Elastic wave insulation and propagation control based on the programmable curved-beam periodic structure
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Curved-beams can be used to design modular multistable metamaterials(MMMs)with reprogrammable material properties,i.e.,programmable curved-beam pe-riodic structure(PCBPS),which is promising for controlling the elastic wave propagation.The PCBPS is theoretically equivalent to a spring-oscillator system to investigate the mechanism of bandgap,analyze the wave propagation mechanisms,and further form its geometrical and physical criteria for tuning the elastic wave propagation.With the equiv-alent model,we calculate the analytical solutions of the dispersion relations to demon-strate its adjustability,and investigate the wave propagation characteristics through the PCBPS.To validate the equivalent system,the finite element method(FEM)is employed.It is revealed that the bandgaps of the PCBPS can be turned on-and-off and shifted by varying its physical and geometrical characteristics.The findings are highly promising for advancing the practical application of periodic structures in wave insulation and propa-gation control.
curved-beam based periodic structureequivalent stiffnessspring-oscillator systemdispersion relationwave propagation
Jiajia MAO、Hong CHENG、Tianxue MA
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Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures,Department of Mechanics,School of Mathematics,Statistics and Mechanics,Beijing University of Technology,Beijing 100124,China
Department of Mechanics,School of Physical Science and Engineering,Beijing Jiaotong University,Beijing 100044,China
National Natural Science Foundation of ChinaNational Natural Science Foundation of China
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