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中文摘要：
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.
英文摘要：
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.
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