Hydroelastic effect and new reduction device on sloshing load

为了建立考虑液舱壁面水弹性效应的晃荡载荷估算方法，研制新型的液舱晃动压力减振装置，采用不同类型的液舱模型进行了试验研究。结果表明，与罐体模型的比例尺比R相比，平均峰值压力的比值为0.7R~1.3R，当冲击压力作用于罐顶时，可用四分之一圆模型估算附加水的质量。另外，尽管在充填率较大的情况下，膜材料对晃动压力的降低效果显著，但在中高填充率时，绳索支撑点的反作用力变大。因此，只有在低充填率的情况下才对减速装置进行了改进，并在实验上验证了其有效性。

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.