中文摘要：

设计了一款串联双附加气室约束膜式空气弹簧作为机载计算设备的隔振元件.利用气体的连续方程、状态方程、能量方程及弹簧的受力状态等建立弹簧的动力学模型,分析了空气弹簧的非线性特性、两节流孔半径变化及两附加气室体积变化对阻尼比的影响和空气弹簧的隔振效果.结果表明：空气弹簧具有周期非线性的特点;在各气室初始体积不变的情况下阻尼比的极大值首先与节流孔Ⅰ有关,在节流孔Ⅰ的半径足够大时,才与节流孔Ⅱ有关;在保持附加气室总体积不变的条件下,随着附加气室A与附加气室B体积比的增加,阻尼比减小;无论附加气室容积比如何变化,产生最大阻尼的节流孔Ⅱ的半径不变.

英文摘要：

As a kind of vibration isolation component of computating device onbord,a new type of air spring with series double additional gas chambers is designed.According to the property of air spring’s structure,the dynamics model of air spring is established on the basis of the air continuity equation,the state equation,the energy equation and the stress state of air spring.The nonlinear property of air spring,the radius change of two throttle orifices,the effect of double gas chambers’volume change on the damping ratio and the result of air spring’s vibration isolation are all discussed.The results show that the designed air spring owns the property of periodic nonlinear while the nonlinear property increases with the initial energy’s increase.Moreover,when the initial volume of every gas chamber is unchanged,the damping ratio’s maximum value of air spring is first relative to the throttle orifice I and then is only relative to the orificeⅡ when the diameter of throttle orifice I is big enough.When the total volume of double gas chambers is invariable,the damping ratio decreases with the increase of volume ratio between the additional chamber A and the additional B.Whatever the change of volume ratio between the two additional gas chambers occurs,it remains invariable to the radius of throttle orificeⅡwhich results in the maximum damping.The air spring with double additional gas chambers owns the better effect on vibration isolation than the air spring with single additional gas chamber.