Hydroelastic effect and new reduction device on sloshing load

为了建立考虑罐壁水弹性效应的晃动载荷估算方法，开发新型的晃动压力减小装置，采用不同型号的罐体模型进行了试验研究。结果表明，与水箱模型的比例尺比R相比，平均峰值压力的比值在0.7R ~ 1.3R之间，在对水箱顶板施加脉冲压力时，通过四分之一圆模型可以估算出附加水的质量。此外，虽然膜材料对内部流体大填充比下的晃动压力降低效果显著，但在中高填充比下，绳索支撑点处的反作用力变得较大。因此，仅针对低填充率对减速装置进行了改进，并通过实验验证了其有效性。

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.