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Comparative Study on Multiple Multi-Level Substructure Method and Modal Synthesis Method
Author(s): 
Pages: 118-126
Year: Issue:  2
Journal: Applied Mathematics and Mechanics

Keyword:  多重多级子结构 模态综合法 超单元 Lanczos方法;
Abstract: 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.
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