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| Vibration response of a simply supported beam of liquid crystal elastomer under periodic illumination |
| Received:September 15, 2022 Revised:October 22, 2022 |
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| DOI：10.7511/jslx20220915002 |
| KeyWord:Liquid crystal elastomer controlled vibration periodic illumination dynamic model simply-supported |
| Author | Institution |
| 赵俊 |
安徽建筑大学 土木工程学院, 合肥 |
| 华立夫 |
安徽建筑大学 土木工程学院, 合肥 |
| 李凯 |
安徽建筑大学 土木工程学院, 合肥 |
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| Abstract: |
| A liquid crystal elastomer (LCE) has a wide range of applications in energy conversion,soft robotics and non-contact control because of its properties such as fast photothermal response and reversible deformation.In this paper,the dynamic model of a simply-supported LCE beam is established to study its bending vibration phenomenon under periodic light illumination by taking advantage of the property that a liquid crystal elastomer can be coupled with mechanical deformation under external light stimulation.The light-driven control equation of the simply supported LCE beam is firstly established,and then the semi-analytic solution of the equation is obtained by the vibration superposition method,and then the change law is programmed by Matlab software.The numerical results show that the periodic light can cause the simply supported LCE beam to vibrate periodically,the vibration amplitude in the beam span can be adjusted by damping,thermal relaxation time,light intensity,light period and light rate,the vibration equilibrium position can be adjusted by light intensity and thermal relaxation time,and the vibration response time can be controlled by thermal relaxation time and damping.The results of this paper have some guidance significance in the control of light-driven motion and the design of light-mechanical energy conversion system. |
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