CAJ | 학술논문

为了解决双稳态压电悬臂梁输出电压小等问题,引入了上吸引下排斥纵向辅助磁力,通过实验研究了辅助磁力对于双稳态压电悬臂梁复杂非线性动力学行为的影响. 实验所用的材料为上下对称的层合梁,压电层的材料为极化后的PVDF,基层的材料为黄铜. 对压电悬臂梁进行简谐激励,通过电压和位移的正向扫频和逆向扫频研究系统的跳跃现象,研究辅助磁力对于系统动力学行为的影响,分析纵向辅助磁力对系统由倍周期分叉进入混沌运动的影响. 实验结果表明:当辅助磁铁与主磁铁之间的距离较大时,该双稳态系统表现出明显的硬弹簧特性;当辅助磁铁与主磁铁之间的距离较小时,该双稳态系统表现出明显的软弹簧特性;当辅助磁铁与主磁铁之间的距离由小变大时,系统表现出复杂化的非线性行为.
위료해결쌍은태압전현비량수출전압소등문제,인입료상흡인하배척종향보조자력,통과실험연구료보조자력대우쌍은태압전현비량복잡비선성동역학행위적영향. 실험소용적재료위상하대칭적층합량,압전층적재료위겁화후적PVDF,기층적재료위황동. 대압전현비량진행간해격려,통과전압화위이적정향소빈화역향소빈연구계통적도약현상,연구보조자력대우계통동역학행위적영향,분석종향보조자력대계통유배주기분차진입혼돈운동적영향. 실험결과표명:당보조자철여주자철지간적거리교대시,해쌍은태계통표현출명현적경탄황특성;당보조자철여주자철지간적거리교소시,해쌍은태계통표현출명현적연탄황특성;당보조자철여주자철지간적거리유소변대시,계통표현출복잡화적비선성행위.
This paper introduced the auxiliary magnetic force based on the bistable piezoelectric cantilever beam in order to improve the voltage output of the bistable piezoelectric cantilever beam. The influence of the auxiliary magnetic force on the complex nonlinear dynamic responses of the bistable piezoelectric cantilever beam was studied. The experiment structure was a symmetric laminated beam. The material of the piezoelectric layer was PVDF, and the material of the basic layer was brass. The excitation of the piezoelectric cantilever beam was the harmonic excitation. The jump phenomenon was studied by the forward sweep frequency and the reverse sweep frequency of the voltage and displacement. The effect of longitudinal auxiliary magnetic force on the chaotic motion of the system was researched. Experimental results showed that when the distance between the auxiliary magnet and the primary magnet is large, the bistable system exhibits obvious hard spring characteristic. When the distance between the auxiliary magnet and the primary magnet is small, the bistable system exhibits obvious soft spring characteristic. In addition, when the distance between the auxiliary magnet and the primary magnet is small, the nonlinear dynamics of the system tends to be rich and complex.