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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Determination of State Transition of Granular Materials in a Vibrating Bed Using a Novel Optical Signal Analyzing Method
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Determination of State Transition of Granular Materials in a Vibrating Bed Using a Novel Optical Signal Analyzing Method

机译：新型光信号分析方法测定振动床中颗粒材料的状态转变

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摘要

Granular material motion in a vibrating bed was investigated using an optical signal analyzing method.When the vessel relative acceleration was greater than some threshold acceleration and the particle was located higher than some threshold height in the bed,the particle vertical vibrating frequency deviated from the vibrator frequency and the particle vibrating frequency was half of the vibrator frequency.When 3.5-mm rubber particles were used,the particle vertical vibrating frequency deviated from the vibrator vibrating frequency when the relative acceleration was greater than 1.75 g and the deviation was observed when there was at least one particle layer below the insert card.The threshold relative acceleration causing the state transition increases with the increase of vibrator frequency.When particles are subjected to vertical vibration,the fluid-like behavior of the particle bed initiated from the surface of the bed with increasing relative acceleration.The interaction of the rising and falling momentum fluxes provides a possible mechanism for the state transition of the granular materials in a vibrating bed.
机译：使用光信号分析方法研究了振动床中物料的颗粒运动。当容器的相对加速度大于某个阈值加速度并且粒子位于该床中高于某个阈值高度时，粒子垂直振动频率偏离了振动器频率和颗粒振动频率是振动器频率的一半。当使用3.5 mm橡胶颗粒时，当相对加速度大于1.75 g时，颗粒垂直振动频率与振动器振动频率有偏差，并且当存在相对振动时，会观察到偏差。插入卡下方至少一层颗粒层。引起状态转换的阈值相对加速度随振动器频率的增加而增加。当颗粒受到垂直振动时，颗粒床的流体状行为从床的表面开始随着相对加速度的增加。唱歌和下降的动量通量为振动床中粒状材料的状态转变提供了一种可能的机制。

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