digital datcom 源代码及实例分析

ADINA 系统是一个单机系统的程序，用于进行固体、结构、流体以及结构相互作用的流体流动的复杂有限元分析。借助 ADINA 系统，用户无需使用一套有限元程序进行线性动态与静态的结构分析，而用另外的程序进行非线性结构分析，再用其他基于流量的有限元程序进行流体流动分析。此外， ADINA 系统还是最主要的、用于结构相互作用的流体流动的完全耦合分析程序（多物理场）。(ADINA System is a stand-alone system program for performing complex fluid flow finite element solid structure, and fluid structure interaction analysis. With ADINA system, users do not need to use a finite element program linear static and dynamic structural analysis, but with additional nonlinear structural analysis program, and then the other program flow based on finite element analysis of fluid flow. In addition, ADINA system or main, fully coupled analysis program for fluid flow structure interaction (multi-physics).)

pscad的单相接地故障仿真，按照教程还原版，文中自带仿真结果(pscad of single-phase ground fault simulation, follow the tutorial also the original, the paper comes with simulation results)

计算天体力学中常用的HANSEN函数,对偏心率小于0.1时适用(This code for hansen function )

不可压缩后稳态径向滑动轴承润滑计算方法，等刚度，不考虑负压(Incompressible steady-state radial sliding bearing lubrication calculation method on the stiffness, do not consider the negative pressure)

先定义各个失效模式下的刚度矩阵，如基体拉伸失效就定义dagmatrix（nblock），按照你的退化方式用if语句判断，符合条件就把相应刚度赋予折减后的值(Define the stiffness matrix of each failure mode first, if the matrix tensile failure defines the dagmatrix (nblock), according to your degradation mode judged by if statement, accord with the conditions of the corresponding stiffness given reduced value)

用户子程序帮助文档，官方文件，包含vumat和umat(User subroutine help documentation)

粘塑性模型的算法，带有INP文件，用于二维的平面模型。(viscosity plasticity model ,with inp files ,used for plane models)

ISAAC采用多块网格技术求解二维或三维的Euler或者NS方程，并且提供了大量的湍流模型供使用，为相关研究人员提供了很好的参考。(ISAAC solves 2D or 3D Euler or NS equatioon based on a multiblock grid technique, also lots of turbulence models is included in the code. ISAAC provides a good reference for relative researches.)

说明：  3维hashin失效准则~复合材料层合板(3-D Hashin Failure Criterion ~Composite Laminates)

求解二维声子晶体能带结构XY模式，内附注释，希望能帮到你(Solving the two-dimensional phononic crystal band structure XY mode, included comments, I hope it may give some help )