Experimental Investigations on Slamming Impacts by Drop Tests
Experimental Investigations on Slamming Impacts by Drop Tests
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跌落试验对撞击影响的实验研究
DOI：
10.3744/snak.2010.47.3.410
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Sang
中科院分区：
文献类型：
--
作者：
Hyunkyoung Shin;Sung;Sang
船舶在大风浪中作大幅度运动时，会产生砰击现象，并承受冲击压力载荷。近年来，随着船舶的大型化和快速化，船舶的艏艉部受到较大冲击的可能性越来越大。长期以来，许多学者对砰击问题进行了大量的实验和理论研究。在公开的文献中，大多数研究报告集中在如何准确地估计砰击峰值压力的幅值。根据最近发表的工作结果，不仅峰值压力的幅值，而且峰值的宽度可以在预测冲击结构的损伤程度中起重要作用。许多研究者已经指出了砰击引起的冲击压力载荷的不确定性。然而，脉冲压力载荷的概率处理很少。在这项研究中，在具有0°和10°的死升角的楔形物上进行跌落试验。不仅测量了峰值压力的幅度，而且测量了峰值压力的宽度。此外，还为砰击问题的概率方法提供了这些值的变化。
AbstractWhen ships are sailing with large motions in rough waves, the slamming phenomenon occurs and the ships suffer from impulsive pressure loadings. Recently, ships are becoming lager and faster than before and it becomes more possible that the ships experience larger impacts on their bows and sterns. Many researchers have been pe rforming the investigations on slamming experimentally and theoretically for a long time. Most of the research reported in the open literature focused on how to accurately estimate the amplitude of the peak pressure of slamming. According to the results of a recently published work, not only the amplitude of peak pressure but als o the width of the peak may play an important role in predicting the extents of damage of impacted structures. The uncertainty of impulsive pressure loadings due to slamming has been indicated by many researchers. However, probabilistic treatments of the impulsive pressure loadings are few. In this study, drop tests were conducted on wedges having dead-ris e angles of 0° and 10°. Not only the amplitude of peak pressure but also the width of peak pressure were measured. Furthermore, the variations of those values are also provided for the probabilistic approach of the slamming problem.