Comparative Study on Multiple Multi-Level Substructure Method and Modal Synthesis Method
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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.Abstract: The multilevel substructure method was compared with the traditional dynamic substructural modal synthesis method (the super element method for MSC.Nastran). By using Lanczos method and technology of substructure tree travelling, the contribution of the multilevel 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 multilevel substructure method is more flexible than the traditional modal synthesis method in dividing substructure and calling multilevel substructure, which is not limited by the complex substructure and more accurate at higher frequencies.
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[1] Hurty W C.Vibration of structural systems by component mode synthesis[J]. Journal Engineering Mechanics Division, ASCE,1960, 86: 51-59. [2] Hurty W C.Dynamic analysis of structural systems using component modes[J]. AIAA, Journal,1965, 3(4): 678-685. [3] Craig R R, Bampton M C C.Coupling of substructure for dynamic analysis[J].AIAA, Journal,1968, 6(7): 1313-1319. [4] Craig R R, Chang C J.Freeinterface methods of substructure coupling for dynamic analysis[J] AIAA, Journal,1976, 4(11): 1633-1641. [5] 张亚辉, 林家浩.结构动力学基础[M].大连:大连理工大学出版社, 2007.(ZHANG Ya-hui, LIN Jia-hao. Fundamentals of Structure Dynamics [M].Dalian: Dalian University of Technology Press, 2007.(in Chinese)) [6] 张盛, 方杰, 张洪武, 陈飙松.基于多重多级子结构的Lanczos算法[J].振动与冲击, 2012, 31(6): 23-26.(ZHANG Sheng, FANG Jie, ZHANG Hong-wu, CHEN Biao-song.Lanczos algorithm for eigenvalue analysis of multilevel substructure[J]. Journal of Vibration and Shock,2012, 31(6): 23-26.(in Chinese)) [7] MSC.NASTRAN Superelement users’guide[K].V2001.The MacNeal-Schwendler Corporation, Los Angeles, Ca, 2001. [8] MSC.NASTRAN Quick reference guide[K].V2005.The MacNeal-Schwendler Corporation, Los Angeles, Ca, 2005. [9] 王永岩.动态子结构方法理论及应用[M].北京:科学出版社, 1999.(WANG Yong-yan. Theory and Application of Dynamic Substructure Method [M].Beijing: Science Press, 1999.(in Chinese)) [10] 钱志英, 罗文波, 阮剑华.MSC.Nastran子结构法在航天器动力学分析中的应用[J].航天器工程, 2011, 20(5): 55-60.(QIAN Zhi-ying, LUO Wen-bo, RUAN Jianhua.Application of substructure method based on MSC.NASTRAN in spacecraft structural analysis[J]. Spacecraft Engineering, 2011, 20(5): 55-60.(in Chinese))
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