摘要
利用高精度多重多级子结构方法与传统的动力子结构模态综合法(MSC.Nastran超单元法)进行对比研究.该算法采用Lanczos方法与子结构周游树技术,考虑了各子结构内部自由度对整体求解的贡献,算法精度得到显著提高,并与不作凝聚的单一整体结构分析具有相同的计算精度.数值结果表明多重多级子结构方法相比于模态综合法在子结构划分及多层次调用上更为灵活,计算结果不受复杂子结构划分方式的限制和出口点选取的影响,在高阶频率的计算方面精度更好.
The multi-level substructure method was compared with the traditional dynamic sub-structural modal synthesis method（the super element method for MSC.Nastran）.By using Lanczos method and technology of substructure tree travelling,the contribution of the multi-level substructure method＇s internal freedom of substructure for the whole solution is considered.The result could be improved significantly,and which also had the same calculation accuracy with the overall structure without condensation.The numerical results show that the multi-level substructure method is more flexible than the traditional modal synthesis method in dividing substructure and calling multi-level substructure,which is not limited by the complex substructure and more accurate at higher frequencies.
出处
《应用数学和力学》
CSCD
北大核心
2013年第2期118-126,共9页
Applied Mathematics and Mechanics
基金
国家自然科学基金资助项目(51021140004)
国家基础性发展规划资助项目(2010CB832704)
国家高技术研究发展计划资助项目(2012AA050901)
中央高校基本科研业务费专项资金资助项目(DUT12ZD206)
作者简介
张盛（1976-），男，吉林长春人，讲师，博士（Tel：＋86-411-84706574；E-mail：zhangs@dlut．edu．cn）；
陈飙松（1973-），男，广东兴宁人，教授，博士（通讯作者．Tel：＋86-411-84706574；E—mml：chenbs@dlut．edu．cn）．
