囊式混合介质隔振器的动力学特性试验

Tests for dynamic properties of a gasbag SALiM vibration isolator

为了摆脱气囊的气体泄漏问题,研究中气囊中填充弹性单元体和液体(混合介质)来替代气体。其带来的优点是消除了泄漏现象,可减少对监测和充气设备需求,从而大幅度降低了隔振系统成本。将充填混合介质的囊式隔振器在试验台架上进行正弦扫频激励的动力学特性试验,试验结果表明:囊式混合介质隔振器的振级落差随填充单元体数量的增加而升高;频响函数曲线表现出不同于气囊隔振器的刚度特性,其刚度特性受到所填充的弹性单元体和液体的力学特性影响,随内压的变化表现特性复杂。

Filling gasbag with elastic elements and liquid （solid and liquid mixture, SALiM） instead of air can avoid air leakage problems, and no longer requires position monitoring and maintaining equipments. As a result, it effectively reduces the cost of a vibration isolation system. Here, a liquid and corrugated-pipe elements formed SALiM medium of a vibration isolator. The performance of the vibration isolator was evaluated experimentally and numerically. The result indicated that the vibration isolation effect of the SALiM isolator increases with increase in the number of the corrugated-pipe elements; the stiffness of the gasbag filled with SALiM mixture increases with increase in the pressure of the mixture, but the curve of the frequency response function shows that the stiffness reveals complicated characteristics, that is caused by the mechanic properties of SALiM mixture associated with the gasbag.