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针对矿用FBD局部通风机第2级叶轮的气流相对速度比较大,第2级叶片受到剧烈的气动冲击,从而引起通风机振动剧烈、噪声大等问题。在考虑叶片预应力的前提下,利用有限元软件ANSYS对FBD系列某型号风机的第2级叶片动力学模态进行了分析计算,得出了预应力条件下第2级叶片的前6阶模态频率和振型图,对叶片结构进行了动态性能评估,为降低通风机的噪声和振动,保证其强度提供了依据。
In view of the relative speed of the airflow of the second stage impeller of the FBD local ventilator, the second stage blades are subjected to violent pneumatic impact, which causes the ventilator to vibrate violently and cause large noise. Under the precondition of blade prestress, the dynamic modal of the second stage blade of a certain type of fan of FBD series was analyzed and calculated by finite element software ANSYS, and the first 6 modes of the second stage blade under prestressing condition State frequency and vibration pattern of the blade structure of the dynamic performance evaluation, to reduce fan noise and vibration, to provide a basis for strength.