柱形空气衬垫振动传递特性的试验研究

目的 研究柱形空气衬垫的振动传递特性，以获取振动传递率曲线。方法 在频率为3~100 Hz区间对柱形空气衬垫和确定载荷质量形成的振动系统进行正弦扫频振动试验，分析初始内压和厚度对其振动传递特性的影响规律。结果 初始内压对空气衬垫的隔振能力没有显著影响，3种初始内压下振动系统的共振频率均在35 Hz左右，传递率峰值集中在11左右。当厚度增大时，共振频率和传递率峰值同时减小，空气衬垫隔振能力增强。结论 在满足缓冲性能的前提下，选择合适的初始内压，以及采用多层空气衬垫可显著提高其隔振能力。研究结果可为柱形空气衬垫的缓冲隔振包装设计提供基本依据。

Experimental Study on Vibration Transmissibility Properties of Cylindrical Air Cushion

The work aims to explore the vibration transmissibility properties of the cylindrical air cushion, so as to obtain the vibration transmission rate curves. The sinusoidal frequency sweeping vibration test was carried out on the vibration system formed by cylindrical air cushion and load mass in the frequency range of 3~100 Hz to analyze the influence rule of initial internal pressure and thickness on its vibration transmissibility properties. The results showed that, the initial internal pressure had no significant effect on the vibration isolation capability of the air cushion. The resonance frequencies of the vibration system at three initial internal pressures were all around 35 Hz, and the peak value of the transmission rate was around 11. With the increase of thickness, the resonance frequency and the transmission rate peak were simultaneously reduced, and the vibration isolation capability of the air cushion was enhanced. Therefore, the selection of a suitable initial internal pressure and the use of a multi-layer air cushion can significantly improve its vibration isolation capability while satisfying the cushioning performance. The research results can provide a basic basis for the design of the cushioned vibration isolation package for cylindrical air cushion.