Snap-Through Instability Patterns in Truss Structures

Snap-Through Instability Patterns in Truss Structures
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桁架结构中的突弹不稳定性模式

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发表时间：
2010
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通讯作者：
Glenn A. Hrinda
Glenn A. Hrinda
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文献类型：
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作者：
Glenn A. Hrinda

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利用有限元分析中的弧长法对具有跳跃行为的几何非线性桁架结构进行了分析。不稳定模式是在整个突破性事件中绘制的平衡路径。对这些图案的仔细观察有助于识别大型空间结构中的薄弱设计，以及在称为微电子机械系统(MEMS)的电子设备的小型化中识别所需的突击行为。通过跟踪它们的平衡路径，研究了表现出跳跃行为的高度非线性桁架的例子。
Geometrically nonlinear truss structures with snap-through behavior are demonstrated by using an arc length approach within a finite element analysis. The instability patterns are equilibrium paths that are plotted throughout the snap-through event. Careful observation of these patterns helps to identify weak designs in large space structures, as well as identify desirable snap-through behavior in the miniaturization of electronic devices known as microelectromechanical systems (MEMS). Examples of highly nonlinear trusses that show snap-through behavior are examined by tracing their equilibrium paths.