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。
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。
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