| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Acoustic metamaterial composites were investigated by computer simulations. Vibrational properties of elastic composites containing a mass-in-mass microstructure embedded in a solid matrix are numerically studied. Using a lattice model, the vibrational density of states in three-dimensional composite structures where resonant particles are randomly dispersed was investigated. By dispersing resonant particles in the system, a sonic band gap appears. Such band gap can be introduced in a desired frequency regime, and the width of the band gap can be also controlled. In addition, multiple sonic band gaps can be realized using different species of resonant particles. These results give us an useful method to fabricate devices that can inhibit the propagation of elastic waves with specific frequencies using acoustic metamaterials.
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