混沌状态下非线性隔振装置的隔振性能评估

EVALUATION OF NONLINEAR VIBRATION ISOLATION SETTING' VIBRATION ISOLATION PERFORMANCES UNDER CHAOTIC STATE

针对混沌状态下非线性隔振装置的特殊隔振性能 ,从非线性系统的隔振原理及混沌隔振原理出发 ,提出在激励频率为优势频率的简谐激励下 ,使隔振装置处于特定的混沌状态 ,通过振级落差公式评估隔振装置的整体隔振性能 ,通过优势频率处的能量衰减评估隔振装置对特定优势频率的局部隔离效果 ,从而对混沌状态下的非线性隔振装置的隔振性能进行综合评估。

Considering the nonlinear vibration isolation setting's special vibration isolation performances, based on the vibration isolation theories of nonlinear system and chaotic system, a method is presented for evaluating the system's vibration isolation performance thoroughly, which evaluates the whole vibration isolation performance with the vibration level difference formula, and evaluates the local isolation performance at the special dominant frequency by the dominant frequency's energy attenuation, when the system in a special chaotic state under the simple harmonic excitation with the excitation frequency at the dominant frequency. So the nonlinear vibration isolation setting's vibration isolation performance under chaotic state can be evaluated integrally. The validity of the method is checked by examples.