CAJ | 학술논문

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。
위료분석팽격문제적각충상태삼수대선박입수운동성능적영향，문장채용일충신적 CFD （Computational Fluid Dynamic）방법동태수치모의료이유탄성설형결구적자유입수과정。차방법이용액면포착법화직각절할망격계통해결입수과정중순시이동적자유액면화동변계문제，결합탄성판조량결구적유한원이론장산법확전응용우탄성결구적입수특성분석。기중，근거류장적직각절할망격화탄성결구적판조량단원적특점，제출괄합해문산법적류고우합책략화변계수거전체방법。통과여실험수거진행비교，증명료문중산법구해탄성설형체입수문제적정학성화합이성。최후，건립불동상태삼수（결구재료속성、판후화질량、저면사승각화입수고도등）적탄성설형결구자유입수모형，연구료각삼수대자유입수적탄성설형결구적정체운동성능화국부변형향응적영향。
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.