摘要
为研究刚体附连水质量及其影响因素,本文提出一种基于测量自由振动固有频率的方法测量附连水质量,并设计实验装置研究不同工况下刚体振动频率、刚体浸深、水域宽度与深度对附连水质量的影响。实验结果表明,附连水质量随浸深及水域深度的变化规律与刘易斯法结果相近,水域越窄,附连水质量越大。在此基础上提出水中垂振刚体附连水质量的窄航道修正系数,对刘易斯法进行修正,修正后的计算结果与实测数据趋势一致,误差在可接受的范围之内,该结论对估算船舶附连水质量有一定的参考意义。
A method measuring added mass based on free vibration test is put forward in order to study rigid body＇s added mass and its＇ influencing factors, and a simplified experiment device is designed. Rigid body＇s vibration frequency, immersion depth, width and depth of the waters are changed, and the according added mass under different conditions is calculated in the experiment. The added mass＇ variation with immersion depth and the waters＇ depth measured in experiment is in good agreement with Lewis＇ method. The results also show the narrower the waters is, the larger the added mass will be, thus, a narrow fairways correction coefficient is put forward to amend lewis＇ method. Experiments coincide with the theory, and the coefficient proposed has some reference value for estimating added mass.
出处
《舰船科学技术》
北大核心
2015年第12期7-12,共6页
Ship Science and Technology
