薄壳振动分析的一种实用单元

AN PRACTICAL ELEMENT FOR VIBRATION ANALYSIS OF THIN SHELL

采用三角形平板壳平元分析薄壳自由振动问题，求出前几阶自振频率。该单元由三角形平面应力单元与板弯曲单元叠加而成，依据位移的广义协调原理，构成一种性能优良的单元模型。在壳体振动分析中，沿用常规作法非常便利，程序实现容易，是解决Ｃ_１连续问题的一种有效单元。经算例验证，结果精度较好，适用于形状复杂的薄壳。

Based on reference[1],in the present paper,a practical triangular flat shell generalized conforming element is used to analyzed the problem of free/ribration of thin shell,Its preceding natural frequencies are obtained.Numerical examples show that caculated results by the present element have higher precision.This element is simple,practical and easy to be programed.So it is one of excellent elements in engineering applied.