Accurate geometry! Non linear finite element increment equilibrium equation is set up by two orders theory. Typical structure stability is analyzed with this accurate finite element method.
由二阶理论建立了梁杆结构分析的精确几何非线性有限元增量平衡方程，并利用精确有限元方法对一些典型结构进行了稳定性分析。
This article makes use of variable gradient method and structure Lyapunov Function to solve a kind of global asymptotic stability for solutions of non-linear system of the second order.
用变量梯度法构造李雅普·诺夫函数，解决一类二阶非线性系统解的全局渐近稳定性问题。
The utility model has the advantages of simple integral structure, convenient operation and use, non toxicity and side effects, and good stability.
本实用新型整体结构简单，操作使用方便，无毒副作用，稳定性好。
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