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首页> 外文会议>DE-vol.119; CED-vol.11; American Society of Mechanical Engineers(ASME) International Mechanical Engineering Congress and Exposition; 20061105-10; Chicago,IL(US) >EXPERIMENTAL STUDY ON CANCELLING SELF-EXCITED VIBRATIONS BY PARAMETRIC EXCITATION
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EXPERIMENTAL STUDY ON CANCELLING SELF-EXCITED VIBRATIONS BY PARAMETRIC EXCITATION

机译：参数激励抑制自激振动的实验研究

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摘要

This article reports on the experimental verification of an anti-resonance effect obtained by parametric stiffness excitation. From theoretical studies it is known that parametric excitation at non-resonant parametric resonances can improve the damping behavior of a mechanical system and even stabilize an otherwise unstable system. To demonstrate this effect, a test setup was designed, based on a two-mass vibration system, gliding on an air track. Parametric stiffness excitation (PSE) was realized by a mechanical device that creates a time-periodic stiffness by modulating the tension in an elastic rubber band. With this device it was possible to demonstrate the improved damping behavior of the system when the PSE device is operating at or near the first parametric combination resonance of difference type. Also, a simple electro-magnetic device was used to create self-exciting forces. It could be shown for the first time that it is indeed possible to stabilize the unstable system by introducing parametric stiffness excitation.
机译：本文报道了通过参数刚度激励获得的反共振效应的实验验证。从理论研究得知，非共振参数共振下的参数激励可以改善机械系统的阻尼性能，甚至可以稳定原本不稳定的系统。为了证明这种效果，设计了基于双质量振动系统的测试装置，该装置在空气轨道上滑动。参数刚度激励（PSE）是通过机械设备实现的，该设备通过调节弹性橡皮筋中的张力来产生时间周期的刚度。使用该设备，可以证明当PSE设备在差值类型的第一参数组合共振或附近运行时，系统的阻尼性能得到了改善。同样，使用简单的电磁设备来产生自激力。可以首次证明通过引入参数刚度激励确实可以稳定不稳定的系统。

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