In this paper, a singular nonlinear elliptic boundary value problem which is very important in applied science and pure theory was discussed by the method of perturbation, sub-and super-solution.
本文利用摄动方法和上下解方法，讨论了一类奇异非线性椭圆边值问题，它具有很好的应用背景和理论意义。
Because the stiffness and damp matrices are spare and unbalance, especially the stiffness matrix is singular, the solution for the vibration equation becomes very difficult to be obtained.
系统振动方程的自由度多达几百，阻尼阵不为零，因此刚度阵的奇异使方程的求解更加困难。
应用推荐