Active control of structural buckling instability: practical trade-offs and design considerations

摘要

Abstract: This paper reports on practical tradeoffs and design considerations associated with the use of active control to dynamically stabilize structural members against linear buckling. The relationship between active control and other limitations on structural stability, such as yield strength, is examined for the case of axially loaded columns. Graphical constructs compare active control of buckling to various passive alternatives, such as changing the cross- section of a member to increase the moment of inertia, and hence the buckling load. These constructs serve to delineate the design space, showing for which geometrical regimes active control of buckling is a viable option. This delineation of the design space suggests where to look (and where not to look) to find potential applications of active buckling control. This research exposes an open question in our understanding of the effects of material yield strength on systems undergoing active stabilization. This result highlights the need to revisit certain classic experiments that form the basis for our understanding of the delineation between elastic and plastic failure modes to address the active stabilization regime.!13