带仓顶室筒承式群仓自振特性的实验研究

通过21个有机玻璃试件对带仓顶室简承式群仓的自振特性进行了试验研究，探讨了组合简数、支承筒开洞方向、仓顶室抗侧刚度、贮料量不同时前2阶自振频率及振型的变化规律．试验表明：组合筒数增加，自振频率提高；贮料量增加，自振频率降低；仓顶室刚度变化对贮料满仓时的第一阶段自振频率及振型影响较小，但对第二自振频率影响较大；开洞方向与仓联结方向相同或垂直时，对白振频率及振型均有影响．

The Test Study of the Natural Vibration Characteristics of Cylindrical Silo with Building above Top of Silo

According to the experiment based on the study of the natural vibration of 21 organic glass wall supporting group silos,the shifty regularity of the basic frequency of vibration and vibration model are studied,when the number of the silos,the position of the hole on the supporting part,stiffness of the building above top of silo,and the quantity of stored material change respectively.The model test indicates that the natural frequency will rise with the increase of the number of silos and fall with the increase of the quantity of material.Meanwhile,when the silo is full,the stiffness variety of the building above top of silo has little influence on the elementary natural frequency and the model but has much influence on the second natural frequency.In addition,whether the hole is parallel or vertical to the combined direction also influences the natural frequency and the model.