关于质量阵之元素修正法的改进

An Improved Element Correction Method for Mass Matrix Modification

文[1]虽然建立了一种很特殊的元素型法,但它通过元素修正途径得到的修正质量阵M实质上仍为满阵.本文对文[1]的方法提出了一种改进,使得修正质量阵M在某种加权意义下保持有限元质量阵M_A的带状特征.

A specific element-type method developed by Ref. [1] has been improved in this paper. In Ref. [1], the updated mass matrix M with banded-state form can not satisfy well the requirement Φ~TMΦ= I, otherwise it can be satisfied in the sense of certain weighting in the present paper.