改进Guyan～递推减缩技术

本文基于广义逆技术和逐级逼近思想,既建立了精度显著提高的改进Guyan减缩法,又提出了“物理型”近似减缩技术方面精度最好的准动态k级速推减缩公式,然而这些方法的执行时间却与其它“同一级”方法大抵相同．因此说,本方为工程界提供了至今综合效果最好的一类准动态模型减缩技术。

An improved Guyan reduction and successive reduction procedure of dynamic model

Based on the generalized inverse technique and successive approach idea,an improved Guyan reduction and a successive-level quasi-dynamic reduction procedure of analysis model have been developed in this paper.The precision of these methods is obviousely better than that of other metheds with the same level,however computer time required for operating these methods is almost the same as that of other methods with the same level. Thus,it is concluded that the methods of the present paper are the best "physics - type"quasi - dynamic reduction techniques of model on both the precision and computer time,in which so-called" physics-type "means that the condensation transformation matrix of model contains only physical parameter in formations and do not modal parameters.