A bead laying algorithm for enhancing the stability and dynamic behavior of thin-walled structures
A bead laying algorithm for enhancing the stability and dynamic behavior of thin-walled structures
复制标题
用于增强薄壁结构稳定性和动态行为的铺珠算法
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
F. Rammerstorfer
中科院分区：
文献类型：
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作者：
C. Bilik;D. Pahr;F. Rammerstorfer
在薄壁结构中引入珠子以增强弯曲刚度是一种常见的做法，并且已经使用了几十年。通常，此类珠子的形式和图案更多地基于经验和实际结果，而不是基于分析或数值研究。最近已经开发出用于设计或优化珠子的计算方法。手头的论文对这些尝试做出了贡献。它通过系统的珠子设计来提高薄壁结构的抗屈曲性和基频。该设计策略基于这样的思想：通过沿着相应振型的最大主曲率方向铺设珠子，以有效的方式分别干扰结构的屈曲模式和基本振动模式。由于珠子会影响该振型，因此需要采用增量方法。通过应用这种新的迭代设计程序并结合有限元方法，对板和型材结构进行数值研究。
Introducing beads into thin-walled structures for enhancing bending stiffness is a common practice and has been used for many decades. Typically, forms and patterns of such beads are rather based on experience as well as practical results than on analytical or numerical investigations. Recently computational methods have been developed for designing or optimizing beads. The paper at hand contributes to these attempts. It deals with increasing the buckling resistance as well as the fundamental frequency of thin-walled structures by systematic bead design. The design strategy is based on the idea to disturb the buckling mode and the fundamental vibration mode, respectively, of a structure in an efficient way by laying beads along the direction of the occurring maximum principal curvature of the corresponding mode shape. Since the beads influence this mode shape, an incremental approach is required. Numerical investigations into plate and profile structures are performed by applying this new iterative design procedure in combination with the finite element method.