源汇分布法求解非对称剖面水动力系数  

Source-sink distribution method for solving hydrodynamic coefficients of asymmetrical section

作　　者：孙晓雅[1] 宋竞正[2] 林焰[1] 

机构地区：[1]大连理工大学船舶CAD工程中心,辽宁大连116024 [2]哈尔滨工程大学船舶工程学院,黑龙江哈尔滨150001

出　　处：《大连海事大学学报》2006年第2期106-110,共5页Journal of Dalian Maritime University

摘　　要：在线性切片理论中水动力系数的计算剖面按对称剖面处理,而在大幅波浪中剖面非对称的影响不容忽视,为此提出了一种基于源汇分布法的二维非对称剖面水动力系数的求解方法.首先在二维柱体周界表面上连续分布强度待定的脉动点源,然后使流场速度势及流函数满足除物面条件以外的全部边界条件,再通过流函数物面条件的满足来求解出待定的源强,进而由流场的辐射势计算水动力系数.经与有关文献数据和实验数据的比较,验证了该方法计算的有效性.且实算表明,剖面非对称性对某些水动力系数的影响较大.In linear strip theory, the hydrodynamic coefficients were calculated on the basis of symmetrical section, but the influence of asymmetrical section in large amplitude waves could not be neglected. The author presented an approach to calculate the hydrodynamic coefficients of asymmetrical section based on the source-sink distribution method. First, source points were distributed on the surface of the 2D cylinder, the strengths of the source points was determined through the current function satisfying the surface conditions, then the hydrodynamic coefficients was acquired when the radiation potential of the flow fluid was solved. Compared with the data of the document and the experiment, the approach was proved effectively. The result of the calculation shows that the asymmetrical section influences the hydrodynamic coefficients greatly.

关 键 词：波浪理论 源汇分布法 非线性理论 水动力系数 非对称剖面 

分 类 号：O353.2[理学—流体力学]