模态综合法在结构动力修改中应用

模态综合法在大型复杂结构动力分析中有着广泛的应用,它能有效地减少结构的计算自由度.结构动力修改作为结构动态设计,简化设计分析过程,在工程中越来越受到重视.本文针对大型结构动力修改的复杂性,应用模态综合技术来缩减结构的自由度.为简化计算,在模态坐标模型中进行动力修改,提出结构动力修改的子结构方法,结合结构物理参数灵敏度分析,为工程结构动态设计的重分析、再设计提供一有效的实用方法.

Application of Model Synthesis Method to Structural Dynamic Modification

The Model Synthesis Method is widoly used in large complex stru-ctural dynamic analysis to reduce the computed D.O.F.Owing to the fact thatthe techniqe of dynamic modification may greatly simplify the process ofstructural dynamic design,it has become increasingly important for enginee-ring.In this paper,the authors introduce the application of model synthesisto dynamic modification,and thus present a submodal modification method.In this method,the structural dynamic modal is modified in modal coordinate,combined with the physical parameter sensitivity analysis.It provides aneffecient method for dynamic reanalysis and redesign of large complex stru-ctures.