论文部分内容阅读
在弹性梁上等间距安装吸振器,构建带分布式动力器的基座系统,建立了Euler梁-吸振器-弹性支承耦合系统的力学模型。给出了子结构的导纳矩阵,推导了基座的动态特性传递方程,得到了基座系统的力传递率表达式,并详细讨论了系统参数对基座减振性能的影响。搭建了带分布式吸振器基座系统实验平台,对电阻应变式力传感器进行了标定,测试了基座的力传递率特性。数值仿真与实验测试结果均表明,带分布式动力吸振器基座在低频取得了优越的减振效果。
The vibration absorber is installed at equal intervals on the elastic beam and the base system with distributed power generator is built. The mechanical model of Euler beam-vibration absorber-elastic support coupling system is established. The admittance matrix of sub-structure is given, the dynamic characteristic transfer equation of sub-base is deduced, the expression of force transfer rate of base system is obtained, and the influence of system parameters on the vibration-damping performance of base is discussed in detail. The experimental platform with distributed vibration absorber base system was set up to calibrate the resistance strain force sensor and test the force transfer rate characteristics of the base. The numerical simulation and experimental results show that the base with distributed dynamic vibration absorber achieves excellent damping effect at low frequency.