| Project/Area Number |
26420187
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | Kansai University |
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Principal Investigator |
Yamada Keisuke 関西大学, システム理工学部, 准教授 (80456798)
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| Co-Investigator(Kenkyū-buntansha) |
宇津野 秀夫 関西大学, システム理工学部, 教授 (00362442)
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| Research Collaborator |
TERAO Yasuki
IMAI Yuki
NISHIDA Hayato
HIRAYAMA Keita
TANAKA Satoshi
OBA Takafumi
KAWABATA Yusuke
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 吸音 / 低周波音 / 圧電素子 / スマート構造システム / 共鳴 / エネルギハーヴェスティング / モード解析 / 振動制御 / スマート構造 / エネルギーハーヴェスティング |
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| Outline of Final Research Achievements |
We proposed a piezoelectric sound absorbing panel in the preceding research. The sound absorption coefficient was maximized at the targeted frequency; however, there remains a problem that the frequency range where the sound absorption coefficient is high is narrow. Therefore, two methods that broaden the frequency range were proposed in this research. One method uses an L-LRC circuit instead of the LR circuit to increase a natural frequency. The other method amplifies the excitation sound pressure that is added to the plate using a microphone and another piezoelectric element. This active method decreases the mechanical impedance of the plate. The frequency range is increased by about 50 % and 250 % by the former and latter methods, respectively. In addition, the modal analysis of the acoustic field that is subjected to the displacement excitation was also studied. Furthermore, the effectiveness of the energy harvesting using the piezoelectric sound absorbing panel has been studied.
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