弹性楔形体各状态参数对入水运动性能的影响  

Effect of status parameters for elastic wedge on dynamic performance of water-entry

作　　者：王文华[1,2] 黄一[2,3] 王言英[2] 翟钢军[3] 黄亚南[2,4] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学船舶工程学院,辽宁大连116024 [3]大连理工大学深海工程研究中心,辽宁大连116024 [4]大连海洋大学航海与船舶工程学院,辽宁大连116024

出　　处：《船舶力学》2014年第11期1320-1330,共11页Journal of Ship Mechanics

基　　金：国家自然科学创新研究群体基金资助项目"海洋环境灾害作用与结构安全防护"(50921001);国家青年科学基金项目"运动物体穿过深海密度分界面的水动力特性研究"(11202047)

摘　　要：为了分析砰击问题的各种状态参数对船舶入水运动性能的影响,文章采用一种新的CFD(Computational Fluid Dynamic)方法动态数值模拟了二维弹性楔形结构的自由入水过程。此方法利用液面捕捉法和直角切割网格系统解决入水过程中瞬时移动的自由液面和动边界问题,结合弹性板条梁结构的有限元理论将算法扩展应用于弹性结构的入水特性分析。其中,根据流场的直角切割网格和弹性结构的板条梁单元的特点,提出适合该文算法的流固耦合策略和边界数据传递方法。通过与实验数据进行比较,证明了文中算法求解弹性楔形体入水问题的正确性和合理性。最后,建立不同状态参数(结构材料属性、板厚和质量、底面斜升角和入水高度等)的弹性楔形结构自由入水模型,研究了各参数对自由入水的弹性楔形结构的整体运动性能和局部变形响应的影响。In order to analyze the influence of various status parameters of ship slamming on dynamic per-formance of water-entry, a new CFD method was presented to numerically simulate the physical process of 2D elastic wedge entering water. Therein surface capturing method and Cartesian cut cell mesh system were used to treat moving free surface and solid boundary. Furthermore, by combining with finite element theory of elastic beam structure, the CFD method was developed to study hydroelastic performance of elastic struc-ture during water-entry process. In this method, based on the characteristic of Cartesian cut cell mesh and beam element, a particular data transfer method on elastic boundary is deduced and described. By com-paring with the experimental data, the calculated results show the feasibility and validity of this present method to calculate water entry problem of elastic wedge. Finally, free falling water-entry models of elastic wedge with various structural parameters （material properties, structural thickness and mass, deadrise an-gle, initial height, and so on） were created, and then the effects of structural parameters on global rigid mo-tion and local elastic response of free-falling elastic wedge were studied and discussed.

关 键 词：弹性楔形结构 自由入水 液面捕捉法 直角切割网格系统 有限元理论 数据传递方法 

分 类 号：U671.5[交通运输工程—船舶及航道工程]