气囊隔振器具有恒定工作高度下通过改变充气压力调节刚度和承载能力,以满足不同设备隔振需求的特性.分析了该特性对其性能试验方法的影响,针对气囊隔振器载荷-变形曲线呈封闭迟滞状,提出了基于多项式拟合的静刚度计算方法,采用恒定载荷激振对气囊隔振器动态性能展开试验研究,并以某型带嵌入撑条的橡胶-帘布长方体形气囊隔振器为试样,进行了静、动态性能试验.试验结果表明,长方体形气囊隔振器额定载荷以及额定载荷作用下的静刚度、动刚度与囊内充气气压之间基本成线性关系.并且,不同充气压力下,气囊隔振器与相应额定承载质量组成的系统在垂直方向上固有频率差别很小.%An airbag vibration isolator can adjust its stiffness and load-bearing ability through changing its internal air pressure under a constant working height to meet the vibration isolation requirement of different equipment.The effects of this characteristic on the airbag vibration isolator''s performance test method were analyzed here.Aiming at its load-deformation curve being closed and hysteretic, a calculation method of its vertical static stiffness based on the polynomial fitting was proposed.Its dynamic performances under the excitation of constant loads were tested and studied.Finally, static and dynamic performance tests were conducted for a certain type rectangular airbag vibration isolator.The test results showed that the rated load, the static stiffness and the dynamic one of the airbag vibration isolator under the rated load are linearly related to its internal air pressure;its internal air pressure has little influence on the natural frequency in vertical direction of the system composed of the airbag vibration isolator and its rated loaded mass.
展开▼
