电磁-碰撞复合阻尼系统减振性能研究

提出了一种新型电磁-碰撞复合阻尼减振方法,通过理论推导,建立振动系统在复合阻尼作用下的振动力学模型。通过实验,分别测得相同初始位移激励下振动系统的自由振动、加碰撞阻尼的振动以及加电磁-碰撞复合阻尼的振动曲线。实验验证了复合阻尼系统减振效果和理论计算的正确性。实验结果表明:与自由振动相比较,加碰撞阻尼和加电磁-碰撞复合阻尼能够加快减小振动系统振动的振幅,其中电磁-碰撞复合阻尼的减振效果最明显。最后利用理论模型得到了不同结构参数对复合阻尼系统减振效果的影响规律,并对复合阻尼系统进行了参数优化设计。

Vibration reduction performance of electromagnetic-collision hybrid damping system

A new electromagnetic-collision hybrid damping method for vibration reduction was proposed.Through theoretical derivation,the dynamic model of a vibration system with hybrid damping was established.Through tests,curves of the system’s free vibration,vibration with collision damping and vibration with electromagnetic-collision hybrid damping under the excitation of the same initial displacement were measured,respectively.The test results verified the correctness of the vibration reduction effect of the hybrid damping system and theoretical calculation.The test results showed that compared to free vibration,collision damping or electromagnetic-collision damping can accelerate reducing a system’s vibration amplitude,and vibration reduction effect of electromagnetic-collision hybrid damping is more obvious.Finally,influence laws of different structural parameters on vibration reduction effect of a hybrid damping system were obtained with the theoretical model to perform its optimization design.