关键词: 弹性连杆机构, 低阶谐振现象, 非线性振动, 频率特性, 丙二醇无规共聚醚, 成膜性能, 摩擦学性能, 水基润滑液

Abstract: 　　The frequency characteristics of elastic linkages under exciting force of an unitary frequency are studied with piezoelectric pottery crystal. By means of approaches of frequency analysises and disposition of signales, the responses of link and rocker have been studied by experiments. And a new method to explain the lower order resonance phenomenon of elastic linkages is given, I. E. nonlinear vibration resonance method.

Key words: Elastic linkage, Frequency response, Resonance, Film-forming ability, Tribological properties, Water-based lubricant, Propylene glycol random copolyether