Hydroelastic effect and new reduction device on sloshing load

为了建立考虑液舱壁水弹性效应的晃荡载荷估算方法和研制新型晃荡压力减小装置，利用不同类型的液舱模型进行了试验研究。结果表明，当脉冲压力作用于储罐顶板时，平均峰值压力与储罐模型的比例比R的比值在0.7 ~ 1.3R之间，并且可以用四分之一圆模型来估算储罐顶板的附加水量。此外，虽然膜材料对内流体填充率较宽时的晃动压力降低效果显著，但在中高填充率时，绳索支点处的反力较大。因此，仅针对低充液比的情况对缩径装置进行了改进，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.