Active stiffness control of a plate structure using shape memory alloys and layout optimization

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Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (23) : 30-36.

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Active stiffness control of a plate structure using shape memory alloys and layout optimization

WANG Ming-yi 1, JI Hong-li 1, QIU Jin-hao 1, ZHANG Chao 1

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Abstract

Active stiffness control of plate structure using shape memory alloys is investigated and the layout optimization of actuators on the plate is presented. A FEM model is established to analyze the active control effect and the simulation results were validated by experimental results. The results indicate that the recovery stress of SMA is the main factor in change of structural stiffness. They also show that the effectiveness of this method in stiffness control depends on the temperature, volume ratio, and arrangement of SMA actuators. Furthermore, the layout of SMA actuators is optimized by using a genetic algorithm. The results show that the optimized layout is more effective in stiffness control than the original layout.

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shape memory alloys / stiffness control / recovery stress / layout optimization

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WANG Ming-yi;JI Hong-li;QIU Jin-hao;ZHANG Chao . Active stiffness control of a plate structure using shape memory alloys and layout optimization[J]. Journal of Vibration and Shock, 2014, 33(23): 30-36