Dynamic Wrinkle Reduction Strategies for Cable Suspended Membrane Structures
Dynamic Wrinkle Reduction Strategies for Cable Suspended Membrane Structures
复制标题
DOI：
10.2514/6.2004-1581
复制
发表时间：
2004-04
期刊：
影响因子：
--
通讯作者：
Hiraku Sakamoto;K. Park;Yasuyuki Miyazaki
中科院分区：
文献类型：
--
作者：
Hiraku Sakamoto;K. Park;Yasuyuki Miyazaki
本研究致力于减轻膜结构的振动，膜结构的边界被网状周边电缆包围。与传统的悬链线设计相比，这种提出的膜设计实现了结构质量的显着减少。所提出结构的一个关键动态特性是传播到外周电缆中的支撑扰动对膜的振动频率影响较小。这一特性已被用于开发使用主动控制的减振策略。通过进行非线性瞬态分析证实了这一点，该分析解释了膜中皱纹的影响。结果证实，来自支撑结构的干扰可以通过外周缆索隔离，同时保持内部膜处于无皱绷紧状态。一种简单的主动控制法则已经被开发出来并仅应用于外周电缆。数值模拟表明，网索网格膜与所提出的减振策略的结合可以为面内和面外振动提供足够的阻尼。
The present study addresses vibration mitigation of membrane structures the boundaries of which are surrounded by weblike perimeter cables. This proposed membrane design realizes significant structural mass reduction when compared to the conventional catenary design. A key dynamic characteristic of the proposed structure is that support perturbations propagated into the outer perimeter cables have a minor effect on the vibration frequencies of the membrane. This property has been exploited in the development of vibration mitigation strategies using active control. This is corroborated by carrying out nonlinear transient analysis, which accounts for the effect of wrinkles in the membrane. The results confirm that disturbances emanating from the support structures can be isolated by the outer perimeter cables while maintaining the interior membrane in a wrinkle-free taut condition. A simple active control law has been developed and applied to only the outer perimeter cables. Numerical simulations show that the combination of the web-cable girded membranes and the proposed vibration mitigation strategy can provide sufficient damping for both in-plane and out-of-plane vibrations.