Bessell 基本例句 n.贝塞尔¹⁰⁰ Applying Bessell function and subassemblage-structure method, a tangent stiff-ness matrix of the inelastic finite element is derived and the method of in-elastic compatibility analysis is presented. 在对杆中弹塑性区作出合理假定后，运用贝塞尔函数和子结构方法，推出了弹塑性杆单元的切线刚度矩阵，进而得到二阶弹塑性分析法。 cnki