subroutine fric

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)

说明：  赤平投影软件 赤平投影安装时间为2010年7月26日。 试用期（一个月）过后，需将系统时间更改为上次安装时间方可继续使用该程序。(The LISP program. The installation time of stereographic projection is July 26, 2010. After the probation period (one month), you need to change the system time to the last installation time before you can continue to use the program.)

针对轨道动力学，模拟轨道不平顺的matlab编程，对轨道增加不平顺性，美国六级谱(Addition of track irregularity)

说明：  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)

说明：  四参数建模，matlab编写，用于多孔介质，煤炭，岩石等(Four parameter modeling, matlab preparation, for porous media, coal, rock, etc)

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)

说明：  abaqus的平板约束数值模拟源文件，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：  diff 2 for stationary data

说明：  铝合金门窗辅助设计营销。输入门窗洞口尺寸，系统自动打印下料单、玻璃单、示意图、收银……(Aluminum alloy doors and windows aided design marketing. Input the size of the door and window opening, the system automatically prints the blanking list, glass sheet, schematic diagram, cash register...)

黏弹性阻尼器试验设计，方案以及尺寸设计，涉及到相似转换原则(Test Design of Viscoelastic Damper)