基于液压变压器蓄能器变刚度机构的液压激振方法

Hydro-vibration method based on variable-stiffness elastic mechanism consisting of hydro-transformer and accumulator

提出了一种新的激振方法,即用液压变压器与蓄能器、作动缸组成变刚度弹性机构,该机构连接振体构成液压激振振动回路。调节变压器的排量可以改变弹性机构的刚度,进而改变振动回路的固有频率和振动特性。由于这种方法不再依赖液压阀控制振动,所以能够避免节流损失。构建了激振回路数学模型,进行了仿真分析,表明该回路的固有频率可通过液压变压器在一定范围内任意调节。

A new method about hydro-vibration was put forward. The hydro-vibration circuit was equipped with a variable-stiffness elastic mechanism that consists of a hydro-transformer,an accumulator and an actuator. The stiffness of the mechanism could be changed by adjusting the displacement of the transformer,thereby changing the natural frequency and the vibration characteristics of the circuit. Since vibration wasn＇t controlled by hydro-valve,the throttle loss of energy could be avoided. Math-modeling and digital simulation of the system was done showing that natural frequency of the system could be adjusted in a wide bandwidth by modulating the displacement of the transformer.