源汇法 meaning in English
concept of source and sinks
method of sources and sinks
source and sink method
source-and-sink method
source-sink method
source-sinkmethod
Examples
- In the thesis the low drag - low noise optimization of the vehicle main form design is realized , main accomplishments are as follows . researched the knowledge of drag and flow noise , the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method . the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved , then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization
主要研究内容和成果如下：对航行器绕流流场进行分析，深入研究了阻力和流噪声产生机理，建立了阻力系数和自噪声的评估数值计算模型；采用物面分布源汇法和边界层动量积分法对绕流流场的流体动力参数进行计算，改进了转捩区长度和边界层位移厚度的计算，应用于航行器头部驻点自噪声的计算；最后设计了阻力系数和自噪声数值计算程序模块。 - The calculated drafts covers the whole possible ship draft in the large amplitude motion ; secondly , the research creates and solves the ship large amplitude motion equations . on the one hand , the actual calculation takes into account the coupling between the different motion modes , on the other hand , in the process of calculation of the ship hydrodynamic coefficient , it considers the influence of the nonlinear factor . the hydrodynamic coefficient used in the calculation of froude - krylov force , diffraction force and radiation force changes instantaneously following the draft , and the hydrostatic buoyancy is computed very accurately for the instantaneous immerse hull
本文的研究分为二个部分：首先利用frank源汇法计算水动力系数，计算包括不同吃水时的附加质量和阻尼系数，吃水范围涵盖了船舶大幅度运动时所有可能的吃水；然后建立和求解船舶大幅度运动方程，在实际计算时一方面考虑了运动模态之间的耦合，另一方面在计算水动力时，考虑了非线性因素的影响。 froude - krylov力、辐射力、绕射力中的水动力系数随吃水瞬时变化，静浮力的计算精确到船体瞬时湿表面积，最后用四阶龙格?库塔方法在时域内求解船舶运动方程，并进行了载荷计算。