Based on Hamilton's law of variation principle, the high accuracy incompatible formulation of finite dynamic element that increased internaldegreeoffreedom was established.
汉密尔顿的法律基础上的变分原理，高精度不相容的配方，增加内部自由度动态有限元成立。
2
Based on the theory of generalized conforming element, two triangular membrane elements with rotational degreeoffreedom are developed by introducing internal parameters into its displacement field.
应用广义协调元理论，通过增加内参位移的方法，构造了两个具有旋转自由度的三角形膜元。
3
The dynamics of a two-degree-of-freedom system with 1:1 internal resonance is discussed in this paper.