升阶谱元素在正交各向异性复合材料剪切板中的应用

本文对近年发展的一种新的有限元元素—升阶谱元素进行了探讨,并把改进过的这种元素具体应用于当代直升机广泛采用的正交各向异性复合材料层合板(厚板)问题,实例表明:采用改进过的升阶谱元素,根据应力梯度的变化来选择元素的阶次是能够收敛于正确解的,从经济角度和实用角度来看,该元素性能比较优越。

HIERARCHAL ELEMENTS AND THEIR APPLICATION TO THE PROBLEM OF MINDLIN PLATE

In recent years,a new type of elements,the so called Hierarchal elements ,have been developed.In this paper such elements are applied to the problem of mindlin plate that have been adopted widely in modern helicopter.The computations show that results can converge to the exact solution by choosing different order element according to the intensity of the stress gradient in this problem.In addition ,from the viewpoint of pratical application and economy,Hierarchal elements are more feasible and efficient than common finite elements.