Study On Slamming Of The Bottom And Bow Flare Of River-to-sea Ship

Recently，with the rapid development of economy, the exchange of goodsbecomes more and more frequent, which makes the requirement of river-to-sea ship ishigher and higher. Meanwhile, In order to meet the high requirement of carryingcapacity, save the cost and improve the efficiency of shipping, it is important todevelop the new type of river-to-sea ship. A obvious feature of river-to-sea ship iswide-flat, however, the new type will be wider and more flat which makes theslamming of the bow of the ship easier. And the result of the full scale test shows theinfluence of the slamming when river-to-sea ship enter the sea is very tremendous.Therefore, it is very necessary to take the slamming into consideration whendeveloping the new type.In this paper, on the basis of previous studies, experimental method andnumerical method are applied to investigate the slamming of river-to-sea shipentering water. And the following efforts have been made and the conclusions arepresented:1) learning and summarizing the home and abroad basic theories and researchmethods about slamming of structure entering water, and focusing on the basictheories of the bottom slamming, bow flare slamming and three-dimensional structureslamming;2)Designing the model test of entry water slamming of the bow of river-to-seaship, recording the overall process of entry water slamming of the bow, and obtainingthe distribution regularities of the bottom and bow flare slamming load;3) On the basis of the model test, using the finite element softwareANSYS/LS-DYNA to simulate the overall process of entry water slamming of thebow, comparing simulation result with experimental result, perfecting simulationmethod according to the experimental results and making a deep research oninfluence factor of bow slamming, such as transverse curvature, longitudinalcurvature and slamming velocity.