Hydroelastic effect and new reduction device on sloshing load

水弹性效应和新型晃荡载荷减少装置

• 批准号: 21246131
• 负责人: TANAKA Yoshiteru
• 金额: $ 15.97万
• 依托单位: National Maritime Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21246131/
• 关键词: 船舶工学; スロッシング; 流力弾性応答; 低減装置; LNG船; 縮尺影響; 相似則; 有限要素法解析

In order to establish the estimation method of sloshing load in consideration of the hydroelastic effect of tank walls and to develop the new reduction device for sloshing pressure, the experimental study was conducted by using the various types of tank models. As results, it was cleared that the ratio of the average peak pressure showed from 0.7R to 1.3R compared with the scale ratio R of tank models and that the mass of additional water could be estimated by the quarter circle model when the impulsive pressure was applied to tank top plate. In addition, though the reduction effect of sloshing pressure by membrane materials was remarkable for wide filling ratio of inside fluid, it was found that the reaction force at supporting points of ropes got to large in the middle and high filling ratio. Therefore, the reduction device was improved only for low filling ratio and its effectiveness was verified experimentally.

为建立考虑罐壁水弹效应的晃动载荷估算方法，研制新型晃动压力降低装置，利用各类罐体模型进行了试验研究。结果表明，与水箱模型的比例R相比，平均峰值压力的比率为0.7R至1.3R，并且当脉冲压力施加到水箱顶板时，可以通过四分之一圆模型来估计额外水的质量。此外，虽然膜材料对内部流体填充率较宽时的晃动压力降低效果显着，但发现在中、高填充率时，绳索支撑点处的反作用力变大。因此，仅针对低填充率的情况对减缩装置进行了改进，并通过实验验证了其有效性。

项目成果

スロッシング荷重軽減装置及びスロッシング荷重軽減装置付き船舶

晃动减载装置和配备晃动减载装置的船舶

• 发表时间: 2010