【作者】 张智；

【导师】 骆寒冰； 李怀亮；

【作者基本信息】 天津大学 ， 船舶与海洋结构物设计制造， 2014， 硕士

【摘要】 21世纪是一个海洋世纪，全球人的目光都集中在占地球70%的蓝色海洋中，丰富的海洋资源使得船舶与海洋工程成为经济建设乃至人类发展中重要的一环。在这一领域里，船体砰击问题一直得到人们的广泛关注和研究。不仅仅是船舶会由于砰击现象造成严重的威胁和破坏，而且船体砰击问题是一个强非线性问题，想要很好地模拟实际的情况，用现有的理论数值方法是不能实现的。因此，该问题必须给予足够的重视。本文通过研究了国内外的大量资料，采用CFD数值模拟的方法，对楔形体结构入水砰击问题进行模拟研究，重点得到速度、加速度、砰击压力等分布情况。在前人所做试验的基础上，自行设计并加工了一个模型，进行模型试验，通过数据采集系统得到楔形体在整个入水过程的加速度、压力、动响应等结果，并与FLUENT软件计算结果作对比，吻合较好。经过变动结构的斜升角和质量以及起始位置的高度，对结构入水砰击问题进行了敏感性分析，给出了一种预报三维砰击载荷的方法，为进一步对船首砰击问题的研究提供了有价值的参考。更多还原

【Abstract】 The21st century is an ocean century. All over the world, People’s attention arefocused on the blue ocean, which covered70%of the earth. Rich Marine resourcesmake the ship and ocean engineering an important part of the economic developmentand human development. In this field, ship slamming problem always get people’sattention and research. Not only for the slamming phenomena cause severe threat anddestruction to the ship itself, but also this a strongly nonlinear problem. Theory ofnumerical calculation method in hand cannot simulate the actual situation precisely.As a result, the problem must be given enough attention.Through review on a large amount of domestic and overseas information, thesimulation study of the wedge structure slamming into the water has been made usingCFD software in this paper. We got the distribution of speed, acceleration, slammingpressure etc. On the basis of the predecessors, a model has been designed andprocessed for model test. Through the data acquisition system, we got the wedge’sacceleration, pressure, dynamic response etc during the whole diving process, andcompared with the results of numerical simulation, which matched fine. By changingthe inclined angle of structure, the mass and the height of free fall, the sensitivityanalysis of structure slamming problem has been made, which presents a forecastmethod of three dimensional slamming loads and responses, in addition, provides avaluable reference for further study of the prow slamming problem.更多还原