泡函数是完全定义在有限单元内的模型，在单元的边界上为零而在内部非零泡函数的应用大大地提高了有限元法的收敛性，有效地减少了结构稳定分析的计算工作量文中给出两种杆单元泡函数模型，但其原理可应用于任何结构算例表明，泡函数有限元法在结构的稳定分析中非常有效和经济 The bubble function is a model completely defined in a finite element. The zero at the boundary of the element and the application of the internal non-zero bubble function greatly improve the convergence of the finite element method, effectively reducing the calculation of the structural stability analysis. Two kinds of rod cell bubble function models are given in the paper, but its principle can be applied to any structure. The example shows that the bubble function finite element method is very effective and economical in the structural stability analysis.