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根据牙轮钻机司机室三方向的加速度功率谱图，确定采用自由膜式空气弹簧作为隔振部件，提供了自由膜式空气弹簧横纵向刚度、强度计算公式及其运算方法，阐明了设计步骤。
According to the power spectrum of acceleration in the three directions of the driver ’s cab of a roller cone drilling rig, the free membrane type air spring is selected as the vibration isolation part. The calculation formula of horizontal and vertical stiffness and strength of the free - film air spring and its calculating method are provided.