Stiffness matrix and equivalentnodalforce formula, which take into account of the influence of shear lag, are derived subsequently on the basis of the definition of stiffness coefficient.
以其解析式作为形函数,利用刚度系数的定义,推导了考虑剪滞影响的箱形梁单元刚度矩阵及等效结点力公式。
2
The irregular distribution of the wave load along the erect riser makes the computation of equivalent wave nodalforce difficult when applying Finite Element Method to analyze risers strength.
Equivalent additional stress method can be the same with integral method or combined method depending on the equivalent method of additional nodalforce calculated.