摘要
对空气中简支边界矩形板在点简谐力激励下的振速响应公式从附加质量和声辐射阻尼的角度进行修正,得到了浸水矩形板的振速响应公式。从浸水矩形板振速公式出发,结合声辐射阻尼的定义,从能量的角度推导了矩形板声辐射阻尼的表达式,给出了其与模态辐射效率之间的关系,文中推论与已发表有关文献相比较一致性良好。研究表明:辐射阻尼随着波数比的变化而变化;在中高频段,单面临水矩形板的辐射阻尼远高于其在空气中时的辐射阻尼;板越厚,其声辐射阻尼越小。
For a rectangular plate submerged in water, which is drived by an point harmonic force and embed into the infinite rigidity baffle with simply supported boundary condition, the vibration velocity expression is obtained by revising the mass and damping for a rectangular plate in air. According to the definition of the damping loss factor, the expression of the radiation damping is obtained from the the angle of the energy. The relation of the radiation damping with the modal radiation effency is found. The results show that the radiation damping changes with the increasing of the wave number ratio, the radiation damping of the plate with one side submerged in water is well above the one submerged in air with two sides in the middle and high frequency band, and the more the thickness, the smaller the radiation damping is.
出处
《船舶力学》
EI
CSCD
北大核心
2016年第12期1619-1625,共7页
Journal of Ship Mechanics
基金
Supported by the Natural Science Foundation of Shaanxi Province(2011JM1017)
the Science Research Project of the Education Committee of the Shaanxi Province(2013JK0618)
关键词
矩形板
辐射阻尼
附加质量
the rectangular plate
radiation damping
attached mass
