艏部构型对内倾船型运动响应和上浪砰击压力的影响研究

Influence of bow configuration on the motion response and green water loads of tumblehome hull

内倾船型的艏部构型对船舶在波浪中的运动和上浪载荷特性具有一定的影响。本文基于艏柱倾斜角度选取了倾角为30°、45°和60°的三种艏部构型方案,采用中国数值水池-直角网格有限差分方法(CNTCGFDM),研究了在不同的艏部构型方案下内倾船型在规则波中的运动响应以及甲板上浪载荷特性。其中物体边界及运动的模拟采用浸没边界法来实现,并利用THINC/SW方法来捕捉自由液面。选取艏柱倾角为45°和60°的船型进行模型试验研究,与试验值相比,本文的数值模拟结果吻合良好。结果表明:艏部构型对内倾船型在规则波中的运动响应总体上影响较小,只在某些海况下表现出一定的局部差异,但对内倾船型的上浪砰击载荷则有一定的影响,相较于倾角为30°和60°的构型方案,艏柱倾角为45°的内倾船型在甲板上浪中的载荷性能更加优异。

The bow configuration of the tumblehome hull has a certain influence on the motion and the char⁃acteristics of green water loads in waves.In this paper,based on the inclination angle of stem,three kinds of bow configurations with inclination angles of 30°,45°and 60°were selected.The motion response of the tum⁃blehome hull in regular waves and the load characteristics of green water were studied by using the CNTCGFDM method.The simulation of object boundary and motion was realized by immersed boundary method,and the free surface was captured by THINC/SW method.The ship models with 45°and 60°inclination an⁃gles of stem were selected for model test.The numerical simulation results are in good agreement with the ex⁃perimental results.The results show that the bow configuration has little effect on the motion response of the tumblehome hull in regular waves,and show that some local differences exist only in some sea conditions.It has a certain influence on the slamming load of green water on the tumblehome hulls.Compared with the con⁃figuration scheme with the inclination angles of 30°and 60°,the load performance of green water on tumble⁃home hull with the inclination angle of 45°is more excellent.