结构动力模型一体化降阶技术  

Study on United Model Reduction Method for Dynamic Model

作　　者：刘天雄[1] 华宏星[2] 石银明[2] 

机构地区：[1]中国空间技术研究院,北京100081 [2]上海交通大学振动冲击噪声国家重点实验室,上海200030

出　　处：《强度与环境》2003年第1期31-36,共6页Structure & Environment Engineering

基　　金：直升机旋翼动力学国防科技重点实验室基金资助项目 (项目编号 :JS 5 2 .4.3 )

摘　　要：本文提出应用一体化降阶技术实现结构动力模型的有效降阶 ,即首先在物理空间用动力缩聚 (dy namiccondensation)法 ,然后在状态空间用平衡模型降阶 (BalanceModelReduction)法 ,降低原始模型的阶数 ,这样就能结合有限元分析中物理模型降阶技术及控制理论中平衡降阶法的优点 ,所得降阶模型不仅阶数较低 ,而且所得状态空间方程具有可观且可控的优点。仿真表明 ,这种一体化降阶技术算法稳定 ,计算精度高。A new model reduction technique called united model reduction method is proposed in this paper.The original model order can be reduced by dynamic condensation firstly in physical space and then by Balance Model Reduction secondly in state space.It incorporates the advantage of dynamic condensation with that of balanced model reduction by the model reduction.It can be obtained the dynamic model with the characteristics of low order,controllability and observability.It illustrated by simulation that the new model reduction technique is accurate and reliable.

关 键 词：一体化降阶技术 动力缩聚 平衡降价 

分 类 号：O327[理学—一般力学与力学基础] TB122[理学—力学]