考虑非线性阻尼的双稳态电磁式吸振器的动力学特性研究  

Dynamic characteristics of a bi-stable state electromagnetic vibration absorber considering nonlinear damping

作　　者：刘丽兰[1] 任博林 朱国栋 杨倩倩 

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《振动与冲击》2017年第17期91-96,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(11572243)

摘　　要：将非线性阻尼引入到双稳态电磁式振动能量捕获器中,提出了考虑非线性阻尼的双稳态吸振器。建立了考虑非线性阻尼的双稳态吸振器和主系统的力学模型和数学模型。分析了考虑非线性阻尼的双稳态吸振器随非线性阻尼系数的分岔情况。数值仿真研究发现,特别是在频率共振区域,考虑附加非线性阻尼的双稳态吸振器比线性阻尼的双稳态吸振器对主系统减振更有优势。并进一步获得了主系统及考虑非线性阻尼的双稳态吸振器振动能量随非线性阻尼参数的变化曲线,发现了非线性阻尼对主系统减振及吸振器发电的影响规律。上述研究工作可为双稳态吸振器的研究提供参考。Here, nonlinear damping was introduced into a bi-stable state electromagnetic vibration energy harvester. The harvester with nonlinear damping was proposed to be a nonlinear bi-stable state vibration absorber. The mechanical model for the absorber and the main system was established. The bifurcation diagram for the absorber vibration energy versus nonlinear damping parameter was obtained. Numerical simulation showed that the vibration reduction effect of the main system using a bi-stable state vibration absorber with nonlinear damping is superior to that with linear damping,especially,in the resonance region; furthermore,the relation curve between the vibration energy of the main system using the bi-stable state vibration absorber and nonlinear damping parameter is obtained; the influence laws of nonlinear damping on the vibration energy of the main system and its average output power are obtained. The results provided a reference for studying bi-stable state vibration absorbers.

关 键 词：非线性阻尼 双稳态吸振器 共振 振动能量 平均功率 

分 类 号：O322[理学—一般力学与力学基础]