多自由度系统结构动力计算的截断误差及其修正  

The cut-off error and the modification for dynamics calculating of the multi-freedom structure dynamics

作　　者：金在权[1] 

机构地区：[1]延边大学工学院机械工程系,吉林延吉133002

出　　处：《延边大学学报（自然科学版）》2006年第4期273-276,共4页Journal of Yanbian University（Natural Science Edition）

摘　　要：多自由度系统结构强迫振动,一般按振型分解法计算.实际计算时,因为高阶振型影响很小,所以只取前Q阶振型.本文提出了一种新的求取Q值的方法,并提出了对由于计算时不能取全部振型而产生的计算误差进行弥补的办法,达到了取Q少、精度高、误差修正简便的目的.Generally, the problem of multi-freedom structure forced vibration is calculated by utilizing the decomposition method of the mode of vibration. When calculating the actual problem usually, take the anterior Q orders vibrations, only take into account of the number of Q, cut-off error and the modification of error. This paper is established a standard of norm, achieved the aim to solve above problem with the small number of Q, high precision and the simple modification of error .

关 键 词：多自由度系统 振型分解法 误差 

分 类 号：O326[理学—一般力学与力学基础]