Studies on the Measures for Prevention of Noise on Chute Used Block Roughness

溜槽用块粗糙度噪声防治措施的研究

• 批准号: 06660310
• 负责人: IZUMI Mattashi
• 金额: $ 0.64万
• 依托单位: HIROSAKI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06660310/
• 关键词: Block roughness; Chutes; Noise prevention; Drops; Noise characteristics; Sound level; Scoustic power level; 流水音特性

This study investigated the measures against noise generated by flow of drops or chutes, based on the case study of noise generation in irrigational canals. And also noise characteristics, such as the scoustic power level (PWL), the A-weighted sound level (L(A)) in a hydraulic-jump-type and water-cushion-type drops were studied in fields.The results of this study are summarized as follows :1. As a preventive measure of that noise, a hydraulic model test was performed experimentally with chute used block roughness and the chute with block roughness was applied to the field based on the hydraulic model. The results of this experiment suggest that this method of energy-dissipation be effective as a measures for noise prevention.2. It was found that both the scoustic power level and the A-weighted sound level increase linearly with the inflow energe of hydraulic-jump and the drop of energe per unit width canal. And, both the hydraulic-junmp-type and the water-cushion-type drops, the ratio of diminishment of A-weighted sound level in the traverse direction drops tends to be higher than that in either downstream or upstrieam direction

本研究以灌溉渠系中水滴流噪声为例，探讨水滴流噪声的防治措施。并对水跃式和水垫式水滴的声功率级（PWL）、A计权声级（L（A））等噪声特性进行了现场试验研究。作为噪声的预防措施，对带块糙溜槽进行了水工模型试验，并在水工模型的基础上将带块糙溜槽应用于现场。实验结果表明，这种消能方式是一种有效的噪声防治措施.结果表明，水跃的声功率级和A声级均随水跃的入流能量和单位宽度渠道能量的下降而线性增加。无论是水跃型还是水垫型落差，其A声级沿落差横向的衰减率均大于沿落差上游或下游的衰减率

项目成果

Mattashi Izumi: "Measures for Prevention of Noise on Chute Used Block Roughness." Jour.JSIDRE. Vlo.61-2. 19-24 (1993)

Mattashi Izumi：“防止溜槽使用的块体粗糙度产生噪音的措施”。

Mattashi Izumi: "The Noise Characteristics in Sloping Channels of Hydraulic Jump-Type Drops." Jour.JSIDRE. Vlo.63-5. 53-58 (1995)

Mattashi Izumi：“液压跳跃式跌落倾斜通道中的噪声特性。”

泉 完: "ブロック粗度を用いた急流工の騒音防止対策について" 農業土木学会誌. 第61巻. 19-24 (1993)

Kan Izumi：“利用块体粗糙度的快速流动施工的噪音预防措施”日本农业和土木工程师学会杂志第 61 卷 19-24（1993 年）。

泉 完: "斜面上の跳水における減勢音特性-落差工の流水音調査について(2)-" 平成6年度農業土木学会東北支部研究発表会. 16-17 (1994)

Kan Izumi：“斜坡上跳水的断电声音特性 - 滴水工程中流水声音的调查（2） -” 1994年日本农业土木学会东北分会研究报告16-17（1994）。

泉 完: "跳水型落差工の斜面上における減勢音特性について" 農業土木学会誌、. 第63巻. 53-58 (1995)

Kan Izumi：“关于跳落结构的斜坡上的能量损失声音的特征”日本农业和土木工程学会杂志，第 63 卷，53-58（1995）