潮汐调和分析

用拟牛顿法求非线性方程组 fi( x1, x2, ?, xn ) = 0, i = 1, 2, ?, n 的一组实数解。(A quasi-Newton method is used to find a set of real solutions of the nonlinear equations.)

说明：  大名鼎鼎的burges 方程的Fortran语言程序。Burges方程式源项为零的NS方程，在某些情况下市很有用的。(Famous burges equation Fortran language program. Burges equation source term to zero NS equations, in some cases, city, very useful.)

说明：  在abaqus软件中输出应力三轴度和罗德角，使用的uvarm子程序编写的，程序较为简单(In ABAQUS software, the stress triaxiality and Rhode angle are output, which is written by uvarm subroutine, and the program is relatively simple)

说明：  fortran语言中自由格式与固定格式的区别讲解(Explanation of the Difference between Free Format and Fixed Format in Fortran Language)

使用振型叠加法以及模态截断法分别求解物体振动位移（附详细说明报告）(Using the mode superposition method and the modal truncation method were used to solve the vibration displacement of the object (with detailed reporting))

VUMAT J2 用户子程序，可以进行简单的弹塑性各向同性材料计算(VUMAT J2 Sample, good for abaqus beginner)

弹性流体动压润滑数值计算程序，是全套的完整程序，包含所有的章节(Elastic hydrodynamic lubrication numerical calculation program, is a full range of complete program, including all sections)

关于最新的边界元快速算法的专著，提出了一种代数方法来加快边界元方程组的求解。值得一看。(Boundary Element Methods (BEM) play an important role in modern numer- ical computations in the applied and engineering sciences. Such algorithms are often more convenient than the traditional Finite Element Method (FEM), since the corresponding equations are formulated on the boundary, and, there- fore, a signifi cant reduction of dimensionality takes place. Especially when the physical description of the problem leads to an unbounded domain, traditional methods like FEM become unalluring)

说明：  ABAQUS显式子程序用来计算材料是否破坏和对应刚度折减。(ABAQUE/Explicit subroutine vumat)

pscad的主流仿真 建立了主流输电系统 网络电压380V 频率50Hz(the simulation of DC power system based on pscad)