Wave-induced sound pressure from artificial fish reefs and applicability to sea environment improvement

人工鱼礁波浪引起的声压及其对海洋环境改善的适用性

• 批准号: 08650598
• 负责人: MIZUTANI Norimi
• 金额: $ 1.34万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650598/
• 关键词: Artificial Fish Reef; Sound Pressure

Precise numerical calculation is performed to simulate a flow around two-dimensional structures which were emploved in the experiments carried out in 1996. The pressure vibration are also calculated and their time variations and amplitude spectra are analyzed. The vortices formed around the structure and their behaviors are confirmed to be very similar to those observed in the experiments. Although, the high frequency vibration in the pressure was not able to be reproduced well in the simulation, the amplitude spectrum was well simulated to be increased in a certain frequency domain. This agree with the experimental results in qualitative.Laboratory experiments are also conducted in the three dimensional wave basin using cubic type fish reef models. In the experiments effects of number of fish reef and their arrangements on the sound pressure are investigated. Based on the experimental study, following results are obtaind.1) The installing another fish reef beside the existing one enlarges the velocity between the reefs, however, it does not increase the sound pressure. Similar result is obtained in outer region of the array of the fish reefs.2) The sound pressure in front of the outer corner of the fish reef is enlarged by installing another one. These results suggest that the combined effect of interactions between wave and a group of fish reefs and between flow and each fish reef plays important roles on the characteristics of local sound pressure. This indicates the detail investigations on the arrangement are necessary in installing the fish reefs.

对1996年实验中采用的二维结构绕流进行了精确的数值计算。计算了压力振动，分析了压力振动的时间变化和幅值谱。在结构周围形成的旋涡和它们的行为被证实是非常相似的实验中观察到的。虽然在模拟中不能很好地再现压力中的高频振动，但是在一定的频域中很好地模拟了振幅谱的增加。在三维波浪水池中进行了立方型鱼礁模型的实验研究。在实验中，鱼礁的数量和它们的排列对声压的影响进行了研究。通过实验研究，得到了以下结论：1）在鱼礁旁增设鱼礁，增大了鱼礁间的速度，但并不增加声压。在鱼礁阵列的外部区域也得到了类似的结果。2）通过安装另一个鱼礁来增大鱼礁外角前方的声压。这些结果表明，波与一组鱼礁之间的相互作用和流与每个鱼礁之间的相互作用的联合作用对局部声压特性起着重要的作用。这表明在安装鱼礁时，有必要对布置进行详细调查。

项目成果

水谷 法美・鈴木 篤・内藤 耕治・富田 孝史・岩田 好一朗: "複数の潜水構造物より発生する波動音圧に関する実験的研究" 平成9年度土木学会中部支部研究発表会講演概要集. 309-310 (1998)

Norimi Mizutani、Atsushi Suzuki、Koji Naito、Takashi Tomita、Koichiro Iwata：“多个潜水结构产生的波浪声压的实验研究”1997 日本土木工程师学会中部分会研究报告摘要 309-310 (1998)。

水谷 法美・金 俊圭・鈴木 篤・内藤 耕治・富田 孝史・岩田 好一朗: "潜水構造物より発生する波動音圧に関する実験的研究" 海洋開発論文集. 13. 507-512 (1997)

Norimi Mizutani、Toshikyu Kim、Atsushi Suzuki、Koji Naito、Takashi Tomita 和 Koichiro Iwata：“潜水结构产生的波浪声压的实验研究”海洋研究杂志 13. 507-512 (1997)。

N.Mizutani, J.Q.Kim, A.Suzuki, T.Tomita, K.Iwata: "Fundamental Study on Sound Pressure Generated by Wave-Submerged Structure Interaction" Proc.of Coastal Engineering, JSCE. Vol.44. 1226-1230 (1997)

N.Mizutani、J.Q.Kim、A.Suzuki、T.Tomita、K.Iwata：“波浪-淹没结构相互作用产生的声压的基础研究”Proc.of Coastal Engineering，JSCE。

N.Mizutani, J.Q.Kim, A.Suzuki, K.Naito, T.Tomita, K.Iwata: "Experimental Study on Sound Pressure Generated by Wave-Submerged Structure Interaction" Proc.of Civil Engineering in the Ocean. Vol.13. 507-512 (1997)

N.Mizutani、J.Q.Kim、A.Suzuki、K.Naito、T.Tomita、K.Iwata：“波浪-淹没结构相互作用产生的声压的实验研究”海洋土木工程论文。

N.Mizutani, A.Suzuki, K.Naito, T.Tomita, K.Iwata: "Experimental study on wave induced sound pressure from a group of submerged structures" Proc.of Annual Conference of Chubu Branch.JSCE. 309-310 (1998)

N.Mizutani、A.Suzuki、K.Naito、T.Tomita、K.Iwata：“来自一组水下结构的波感生声压的实验研究”Proc. of Annual Conference of Chubu Branch.JSCE。