Uncertainty in loading and control of an active column critical to buckling
Uncertainty in loading and control of an active column critical to buckling
复制标题
活动柱的加载和控制的不确定性对于屈曲至关重要
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
H. Hanselka
中科院分区：
文献类型：
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作者：
Georg C. Enss;R. Platz;H. Hanselka
在轻质结构中，承重柱结构的屈曲是一个重要的设计约束，因为它可能导致整个结构的倒塌。当柱子承受与其各自的临界屈曲荷载相等的轴向压缩荷载时，将出现临界稳定平衡。当荷载超过其临界屈曲荷载时，被动柱可能会屈曲。如果不完全了解使用过程中的实际载荷，稳定性将变得高度不确定。本文提出了一种通过对细长扁柱结构进行主动稳定来控制对屈曲至关重要的不确定性的方法。主动稳定的基础是通过可控的反力控制第一屈曲模式。这导致了一个可以承受的轴向压缩载荷，理论上可以比所考虑的系统的实际临界屈曲载荷高出近三倍。最后，讨论了所提出的系统的灵敏度，以设计适当的控制器来稳定有源柱。
Buckling of load-carrying column structures is an important design constraint in light-weight structures as it may result in the collapse of an entire structure. When a column is loaded by an axial compressive load equal to its individual critical buckling load, a critically stable equilibrium occurs. When loaded above its critical buckling load, the passive column may buckle. If the actual loading during usage is not fully known, stability becomes highly uncertain. This paper presents an approach to control uncertainty in a slender flat column structure critical to buckling by actively sta- bilising the structure. The active stabilisation is based on controlling the first buckling mode by controlled counteracting lateral forces. This results in a bearable axial compressive load which can be theoretically almost three times higher than the actual critical buckling load of the considered system. Finally, the sensitivity of the presented system will be discussed for the design of an appropriate controller for stabilising the active column.