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首页> 外文会议>Society of Naval Architects and Marine Engineers Annual Meeting; 2005; >Wet Drop Test for LNG Cargo Containment Systems
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Wet Drop Test for LNG Cargo Containment Systems

机译：LNG货物围护系统的湿滴测试

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摘要

In recent years, the worldwide demand for LNG is increasing significantly and larger sized LNG carriers are being considered for economical transport for this trade. As the size of LNG carriers is getting larger, sloshing loads become a very important concern because higher impact pressures will be applied on the cargo containment system, which may cause severe damage. It is therefore necessary to verify the strength and safety of these large vessels under sloshing loads. Based on this interest, this paper intends to introduce the results of wet drop tests for MARK III LNG containment system. The objectives of wet drop tests are to confirm the structural safety and to understand the characteristics of the LNG insulation system under impact loads. The test rig, which can drop the model into water with various impact speeds and water entry angles, has been developed by SHI. Three type models have been made: a rigid steel model and two MARK III system models with flat/corrugated membrane, respectively. The pressure time histories on the membrane side have been recorded by a data acquisition system with high sampling frequency. By comparing the pressures of each model, one can obtain the damping effect of insulation panel and cushioning effect by entrapped gas between corrugations of MARK III system.
机译：近年来，全球对液化天然气的需求正在显着增加，并且正在考虑将较大尺寸的液化天然气运输船用于这种贸易的经济运输。随着液化天然气运输船的尺寸越来越大，晃荡载荷成为一个非常重要的问题，因为更高的冲击压力将施加在货物围护系统上，这可能会导致严重的损坏。因此，有必要验证这些大型容器在晃荡载荷下的强度和安全性。基于这种兴趣，本文打算介绍MARK III LNG密闭系统的湿滴试验结果。湿滴试验的目的是确定结构安全性并了解冲击载荷下LNG保温系统的特性。 SHI开发了可将模型以各种撞击速度和进水角度掉入水中的试验台。制作了三种类型的模型：分别是刚性钢模型和具有平坦/波纹膜的MARK III系统模型。膜侧的压力时间历史记录已通过具有高采样频率的数据采集系统进行了记录。通过比较每个模型的压力，可以得到MARK III系统波纹之间夹带气体的隔热板的阻尼效果和缓冲效果。

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