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首页> 外文期刊>International Journal of Solids and Structures >Enhancing flutter and buckling capacity of column by piezoelectric layers
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Enhancing flutter and buckling capacity of column by piezoelectric layers

机译：通过压电层增强柱的颤动和屈曲能力

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This paper illustrates the use of a pair of piezoelectric layers in increasing the flutter and buckling capacity of a column subjected to a follower force. The column is fixed at one end while the other one is free to rotate but constrained transversely by a spring. The mathematical formulation is presented and solved numerically. The effect of the spring stiffness on the capacity and type of instability of the column is first illustrated numerically for the case without any piezoelectric actuators. A transition value for the stiffness can be identified, below which the column fails by flutter and above which the column buckles. Next, an external voltage is applied on the piezoelectric layers bonded on the surfaces of the column, which induces locally a pair of tensile follower force. This has the effect of increasing the capacity of the column as the voltage increases while the transition stiffness remains virtually unchanged for a given size and location of piezoelectric actuators. It is also shown that the capacity of the column increases with longer layers for a fixed voltage. However, the location of the layers along the column determines the transition stiffness and hence has an effect on the type of failure for a fixed spring constant. Positioning towards the fixed end increases the flutter capacity whereas positioning away will result in an increase in buckling capacity. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 20]
机译：本文说明了一对压电层在增加承受跟随力的圆柱的颤动和屈曲能力中的用途。该柱固定在一端，而另一端则可以自由旋转，但受到弹簧的横向约束。数学公式被提出并通过数值求解。对于没有任何压电致动器的情况，首先以数字方式说明弹簧刚度对柱的容量和不稳定性类型的影响。可以确定刚度的过渡值，在该过渡值以下，列会因颤动而失效，在其之上，列会发生弯曲。接下来，将外部电压施加到粘结在圆柱体表面上的压电层上，从而局部地产生一对拉伸跟随力。这具有随着电压增加而增加柱的容量的效果，而对于给定尺寸和位置的压电致动器，过渡刚度实际上保持不变。还显示出，对于固定电压，柱的容量随着更长的层而增加。但是，沿着圆柱的层的位置决定了过渡刚度，因此对固定弹簧常数的破坏类型有影响。朝固定端定位会增加颤振能力，而远离定位会导致屈曲能力增加。 （C）2002 Elsevier ScienceLtd。保留所有权利。 [参考：20]

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