Introduce Dissipation for Cylindrical Structures with Moon-Pool of Restricted Entrances  

作　　者：Hengxu Liu Wenyang Duan 

机构地区：[1]College of Shipbuilding Engineering,Harbin Engineering University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2015年第2期56-60,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.51079032)

摘　　要：In order to consider the viscous effect,the introduction of a parametric dissipation and new results are realized by applying the new formulation combining and dynamic conditions over the free-surface with viscous terms. The dispersion equation is then modified by assuming an additional term in the boundary condition at the free-surface and wave-number becomes complex number with a small imaginary part which ensures the decay of wave amplitudes. The comparisons of numerical results and model test measurement on wave elevation at the moon-pool center is obtained both for the peak period and for the amplitude at resonance by choosing an appropriated dissipation coefficient. The results show that the introduce dissipation is not only effective but also reliable to provide realistic predictions.In order to consider the viscous effect, the introduction of a parametric dissipation and new results are realized by applying the new formulation combining and dynamic conditions over the free-surface with viscous terms. The dispersion equation is then modified by assuming an additional term in the boundary condition at the free-surface and wave-number becomes complex number with a small imaginary part which ensures the decay of wave amplitudes. The comparisons of numerical results and model test measurement on wave elevation at the moon-pool center is obtained both for the peak period and for the amplitude at resonance by choosing an appropriated dissipation coefficient. The results show that the introduce dissipation is not only effective but also reliable to provide realistic predictions.

关 键 词：moon-pool SEMI-ANALYTICAL eigen-function wave number DISSIPATION 

分 类 号：U661.1[交通运输工程—船舶及航道工程]