VUMAT example

DESIGN - Hardin and Sloane Spherical Designs DESIGN implements a number of Hardin and Sloane spherical designs. A set of N points which lie on the sphere is called a spherical T-design if the integral on the surface of the sphere of any polynomial of degree at most T is equal to the average value of the polynomial evaluated at the set of points. Note that the degree of a polynomial is the highest degree of any of its terms, and that the degree of a term like XAYBZC is A+B+C.

mini hydro power plant with squirrel cage induction generator

考虑混沌效应的粒子群算法，比常规粒子群更容易跳出局部解(optimization method of PSO, concerning the Chaos effect.)

该损伤模型通过 商用有限元软件ABAQUS /Explicit 的用户子程序VUMAT 实现，并使用该模型对碳纤维增强环氧树脂 复合材料层合板在横向低速冲击作用下的损伤和变形行为进行预测分析． 数值仿真的结果与试验结 果进行了比较，吻合良好，验证了该模型的有效性．(Through coding user subroutine VUMAT of finite element software ABAQUS /explicit， and applied the model to an example，carbon fiber reinforced epoxy composite laminates under low velocity impact，the prediction for damage and deformation were good agreement with the experimental results．)

实现Cu基材料的本构关系的回滞模型，可用于超弹性材料的子程序，但对于残余应变的实现不足(A hysteresis model for realizing the constitutive relationship of Cu-based materials can be used for subroutines of superelastic materials, but the implementation of residual strain is insufficient.)

ivf Fortran 有限元计算 一端固支 另一端自由移动的二维梁结构的振动(calculate the 2D beam vibration based on Finite Element Method in Fortran)

介质共形FDTD技术，可以很好地计算圆柱介质的谐振频率，也可以计算谐振腔中含有介质球的谐振频率(Dielectric conformal FDTD technique can be a good medium to calculate the resonant frequency of the cylinder can also calculate the resonant frequency of the resonant cavity containing a dielectric sphere)

说明：  求解二维亥姆霍兹方程的fortran程序，包含网格文件。(Fortran two-dimensional Helmholtz equation solving procedures, including the grid file.)

地球科学：重力场积分(Fortran90) Stokes/Hotine/V_M垂线偏差积分：数值积分、二维平面FFT、二维球面FFT、一维FFT(Earth Sciences: Gravity Field Points (Fortran90) Stokes/Hotine/V_M deflection of the vertical integration: numerical integration, the two-dimensional plane FFT-dimensional sphere FFT, one-dimensional FFT)

滞后相关系数Sllcorrelation 可用于计算滞后/超前相关系数等(The lag correlation coefficient Sllcorrelation can be used to calculate the hysteresis/lead correlation coefficient, etc.)