关键词: 动力问题 外逼近 内逼近 误差率 Neville外推法

Abstract: For dynamic response, especially when frequence is high, the stress ae-
curacy obtained by the finite element method is very low. This question hasn' t been solved theoretically, To solve it, this paper extends Neville extrapolation from one-dimension to multi-dimension, Accordind to numerical characteristics of dynamic response, "outside approach" and "inside approach" are put for-ward, and Neville extrapolation can be used in the finite element method to increase the dynamic stress accuracy.

Key words: Dynamic response Outside approach Inside appro