弹塑性固体刚度矩阵、变形、节点位移等有限元计算程序(Calculation of ElastoPlastic solid stiffness Matrix, deformation and displacement)

该函数计算单元的刚度矩阵，输入弹性模量E、横截面的惯性矩I和梁单元的长度L，输出单元的刚度矩阵(Computational unit stiffness matrix)

本程序采用matlab编写。程序加载由用户提供的前处理数据，包括网格数据和载荷数据。采用直接的数值运算和matlab符号运算两种方法（可选择）生成单元刚度矩阵。自动集成结构刚度矩阵，选用直接解法求解线性方程组，解出节点位移。后处理过程中，程序计算了节点应力值，对于共享节点的应力程序采用各个单元计算值的平均，程序同时给出了单元最佳应力点的应力值！(This program is written in matlab. The program loads pre-processing data pro

计算双质量飞轮弧形弹簧的滞回曲线，得到试验曲线与理论曲线图，计算惯量比、扭转刚度与双质量飞轮固有特性之间的关系。(The hysteresis curve of the curved spring of the double-mass flywheel is calculated, the experimental curve and theoretical curve are obtained, and the relationship between inertia ratio, torsi

该程序可以用来计算齿轮啮合的时变啮合刚度(Time-varying meshing stiffness of gears)