【作者】 何广华； 张子豪； 王正科； 漆池；

【Author】 HE Guanghua;ZHANG Zihao;WANG Zhengke;QI Chi;School of Naval Architecture and Ocean Engineering,Harbin Institute of Technology (Weihai);

【机构】 哈尔滨工业大学(威海)船舶与海洋工程学院；

【摘要】 为了对迎浪航行船舶的大幅运动和甲板上浪进行预报分析,基于自由液面捕捉法的多相流软件FINE/Marine建立了数值模型,基于该模型对Wigley船甲板上浪的动态过程进行了系统的模拟。针对甲板上浪的重要影响因素(波长和波幅等)模拟了在不同波长下Wigley船的运动响应和不同波幅下Wigley船的甲板上浪过程。为了更加真实地模拟上浪过程,模型基于粘性流理论,采用固-液-气三相流耦合模型,并利用BRICS可压缩型离散格式精确捕捉自由液面,减小自由液面附近构成函数的数值扩散,比较理想地处理了波浪破碎和自由液面的复杂演化问题。基于该数值模型计算了Wigley船的辐射问题,其结果与试验数据相符较好。模拟和分析了Wigley船各时段的运动响应特性和水动力性能特性,模拟结果表明相对波长1.2的海况更易发生上浪现象。该研究成果对甲板上浪问题的机理探索以及甲板上浪导致的冲击载荷研究具有重要的作用,对船体主尺度和结构的设计具有一定的参考价值。更多还原

【Abstract】 To predict the large-amplitude motion and green water loading of a wave-facing sailing ship,a numerical model was established using a multiphase-flow software FINE/Marine based on a free-surface capturing method. In this study,the dynamic process of green water loading of a Wigley ship was systematically simulated on the basis of the model. To determine the influence of wavelength and amplitude on green water loading,a green water process was simulated to study the motion responses of the Wigley hull under different wavelengths and amplitudes. To achieve a more realistic simulation,a three-phase solid-liquid-gas flow coupling model based on the viscous flow theory was developed,and the compressible discrete Blended Reconstruction Interface Capturing Scheme( BRICS)was utilized to precisely capture a free liquid surface,which reduces the numerical diffusion of the forming function near the free surface. The model effectively processes breaking waves and complex free surface evolution. The radiation forces at the Wigley hull was calculated on the basis of the numerical model,and the results properly corresponded with the experiment data. Subsequently,the motion response characteristics and hydrodynamic characteristics of Wigley hull at intervals were simulated and analyzed. The simulation results indicate that green water loading occurs more easily under a relative wavelength of 1. 2. The research clarifies the mechanism and impact loads of green water and can help in the design of the principal dimensions and structure of ship.更多还原