The influence coefficient matrix of the linear axisymmetric triangular element and the input vector expression are derived.
推导了轴对称线性三角形元的影响系数矩阵和输入向量公式；
From the point view of applications, the matrix element of the involved linear system of equations is an explicit expression without numerical integration.
从应用角度看就是最终线性方程组每一元素均为显式表达，没有数值积分。
From the point view of applications, the matrix element of the involved linear system of equations is an explicit expression without numerical integration.
从应用角度看就是最终线性方程组每一元素均为显式表达，没有数值积分。
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