To solve the design problem of support stiffness variation strategy in semi-active vibration control of rotor systems,this paper studies an optimization design method for support stiffness variation strategy based on pseudo steady-state response.A lumped parameter model of the structure with time-varying stiffness support was established,the equivalent stiffness and damping of the time-varying stiffness support were derived with the equivalent linearization theory,and the pseudo steady-state response expression was obtained by combining the dynamic equation of the rotor system.On this basis,a support stiffness change strategy optimization method with pseudo steady-state response as the optimization objective was established,and with the rationality of this method through simulation analysis,a rotor system test-bed with controllable stiffness support was established based on shape memory alloy,and vibration control experiments were conducted.The results showed that the maximum response peak vibration reduction rate of the rotor system at critical speed reached 49.7％,verifying the effectiveness of the optimization design method for vibration reduction strategy of the rotor system based on variable stiffness support.
关键词
转子系统/形状记忆合金/变刚度/振动控制/试验研究
Key words
rotor system/shape memory alloy/variable stiffness/vibration control/experimental research
维普
万方数据