diff2

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.)

说明：  用于求解悬臂梁前3阶固有频率和振型（假设模态法，解析法，瑞利里兹法）(It is used to solve the first three natural frequencies and modes of cantilever beam (assumed mode method, analytical method, Rayleigh Ritz method))

说明：  diff 2 for stationary data

说明：  利用地震波生成加速度、速度、位移反应谱曲线(Using seismic wave to generate response spectrum curve)

说明：  用于房屋、大坝、桥梁、水电站等大型结构的时程分析，根据桥梁抗震细则规范标准谱得到的25条地震波(For time history analysis of large structures such as buildings, dams, bridges and Hydropower stations, 25 seismic waves are obtained according to the standard spectrum of seismic rules for bridges.)

说明：  滞回环面积求解，实验数据中滞回曲线的面积计算，采用MATLAB编写。(Solving the area of hysteresis loop)

说明：  简易的配筋软件，适用CAD2014及以下版本。(Simple reinforcement software, applicable to CAD2014 and below version.)

该程序可进行2D和3D恒定流分析，程序中对矩阵含义和比较难理解的部分进行了简要说明(The program can be used for 2 D and 3 D constant flow analysis. The meaning of matrix and the parts that are difficult to understand are briefly explained in the program)

说明：  适合各种桥梁杆系单元计算的有限元计算软件，自带许多算例(Finite element calculation software suitable for the calculation of all kinds of bridge bar system elements, with many examples of its own)

说明：  该文档为双块式无砟轨道建模命令流，该命令可用于ansys平台运行(This document is the command flow for modeling the double block ballastless track)