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在一次振动筛非正常振动状态的测试分析中，发现异常振动是由于聚氨酯筛面与被筛物料共同组成的振系的振动直接引起的，由于该报动与筛机支承弹簧的固有频率接近而造成了工程共振现象──振动筛工作过程中的低频振荡。现场根据分析结果，调整了筛面结构形式，最终消除了不良振动，恢复了正常工作状态。
In a test and analysis of the abnormal vibration state of a vibrating screen, it is found that the abnormal vibration is directly caused by the vibrations of the vibrating system composed of the polyurethane screen surface and the sieved material. Since the natural frequency of the newspaper supporting spring is close to Resulting in the phenomenon of engineering resonance ─ ─ shaker work in the process of low-frequency oscillation. Based on the analysis results, the site adjusted the structure of the screen surface, finally eliminated the bad vibration and restored the normal working condition.