动力吸振器在电动机振动控制中的应用

某舰船泵用电动机运转时，在安装基础上产生了较大的振动。有限元仿真计算和模态试验发现，安装基板上存在的250 Hz及400 Hz的弯曲模态产生较明显的共振。针对此2阶共振频率设计阻尼式动力吸振器，通过“设计-标定-修正”，使动力吸振器达到所设计的频率。在实机上进行了安装测试，结果表明应用该动力吸振器后电动机安装基板上的振动降低了约7 dB，作用效果明显。

Application of Dynamic Tuned Damper to Vibration Control of a Motor

When the pump motor of a ship is in operation, large vibration of its base occurs. Through finite element simulation and modal experiment, it is found that the obvious resonances are excited by the bending modals of 250 Hz and 400 Hz frequencies of the base plate. For the two resonance frequencies, the dynamic tuned dampers are designed respectively. A cyclic procedure of designing-calibrating-modifying is used in the frequency control of the dynamic tuned dampers. The dynamic tuned damper is then installed and tested on the motor. Result of the experiment shows that the vibration of the base plate of the rotor is reduced by 7 dB after the dynamic tuned dampers are installed, and the damping effect is obvious. The design and application method of the dynamic tuned dampers can be widely used in the vibration control of some other industrial equipments.