摘要
为通过运载器充水做振动试验的结果来获取真实燃料下的测量模态（即所谓“介质取代”问题）提供了一种有效的识别技术。该技术的精度远高于当前借用一般局部修改结构的快速重分析法来解决这类问题的精度。该技术也可以用于更为广泛的介质取代问题。特征值分析，识别技术，模态分析，结构，动力修改。
An useful method for identifying test modes of a real structure based on the data of unreal structurewith pseudo-medium is proposed in this paper. The abovementioned object is called as 'Problem of Replaced Medium'. For example, in modal experiment of a launchvehicle, real fluid fuels is always substituted by water. Define thestructure with real medium (fuels) and pseudo-medium(water) as real-and pseudo-structure, respectively. This kindof problems were solved generally by means of fast reanalytical techniques. However attention of the stated problem is not concentrated on computational time. The focus is that the measured modes of real structure are identifiedout as exactly as possible. Example shows that the precision of the method proposed in this paper is much betterthan that of the general fast reanalytical methods.
出处
《机械强度》
CAS
CSCD
北大核心
1996年第4期62-65,共4页
Journal of Mechanical Strength
关键词
模态分析
伪结构试验
运载器
振动试验
eigeuvalue analysis,identification, modal analysis,structure dynamic modification,complete
