3to1

diff 2 for stationary data

说明：  梯形断面明槽水面曲线计算源程序,输入数据即可自动计算结果(Calculation of Water Surface Curve of Trapezoidal Section Open Channel)

39节点系统稳态和暂态运算的bpa源代码(BPA power flow calculation code for 39-node system)

梯形断面明槽水面曲线计算源程序,输入数据即可自动计算结果(Calculation of Water Surface Curve of Trapezoidal Section Open Channel)

说明：  可利用八节点有限单元进行力学分析，荷载形式可以为点荷载或均布荷载等形式(This code can be used for mechanical analysis of eight-node quadrilateral element, and it is suitable for various load forms such as concentrated load, uniform load and so on.)

3维米塞斯屈服准则模型，子程序为vumat，用于abaqus(ABAQUS 3-dimensional Mises yield criterion)

说明：  abaqus的平板塑性圆孔数值模拟源文件，适合abaqus新手操作练习使用(ABAQUS source files for numerical simulation of plate constraints, suitable for ABAQUS novice operation exercises)

说明：  张拉膜结构非线性有限元法找形程序，采用ANSYS APDL语言编制，附带详细注释(Non-linear Finite Element Method (FEM) finding program for tensioned membrane structures, wrote by ANSYS APDL with detailed comments.)

说明：  三层框架，瑞雷阻尼。 激励是白噪声。 先计算得到理论的响应时程，理论频率，再利用响应做峰值法识别频率模态，与理论频率对比。 程序只写到了画ANPSD曲线，还需要自己写一个拾取峰值的代码。(Three story frame, Rayleigh damping. The excitation is white noise. First, the theoretical response time history and frequency are calculated, and then the peak response method is used to identify the frequency mode, which is compared with the theoretical frequency. Later, you need to write a code to pick up the frequency corresponding to the peak value.)

abaqus的动态力学数值模拟源文件，适合abaqus新手操作练习使用(ABAQUS source files for numerical simulation of plate constraints, suitable for ABAQUS novice operation exercises)