变质量-负刚度动力吸振器试验研究

针对传统动力吸振器“窄带”缺陷，设计了一种新型的变质量-负刚度动力吸振器，从而可以使吸振器具有较好的低频有效性。建立变质量-负刚度动力吸振器的动力学方程并分析了吸振器的工作原理；搭建了变质量-负刚度动力吸振器试验台，编制了PID控制程序；对吸振器减振性能进行了动力学仿真和试验研究。研究结果表明，所设计的吸振器连续可调，有效频带比传统吸振器频带宽了17.3%。

Experimental Study on Variable Mass Negative Stiffness Dynamic Vibration Absorbers

Aiming at the defects of narrow band of traditional dynamic vibration absorbers, a new type of variable mass negative stiffness dynamic vibration absorber was presented, so that the vibration absorber might have a good low-frequency efficiency. Firstly, the dynamic equation of the variable mass negative stiffness vibration absorber was established and the operating principles of the absorber were analyzed. Secondly, the variable mass negative stiffness vibration absorber experimental table was built, while the PID control program was compiled. The performance of the new dynamic vibration absorbers in vibration reduction on a primary system was studied via dynamic simulation and some experiments. The results show that, the designed vibration absorbers may be continuously adjusted and the effective frequency band of the designed vibration absorbers were widened by 17.3% compared with the traditional vibration absorbers.