纤维增强复合材料离心风机叶轮强度分析与对比

Analysis and Comparison of Impeller Strength of Fiber Reinforced Composite Centrifugal Fan

针对钢制、玻璃纤维、碳纤维等不同材料和铺层的离心风机叶轮,使用有限元方法对离心叶轮进行强度和固有频率计算分析,钢制叶轮采用Von-Mises等效应力作为失效判定,复合材料叶轮失效判定采用Tasi-Wu失效准则,并计算安全裕度。结果表明,叶轮材料对强度和固有频率存在较大影响,碳纤维离心叶轮相对于钢制和玻璃纤维离心叶轮在强度方面具有明显优势,且有足够的安全裕度,对离心叶轮的轻量化和提高风机性能具重要意义;铺层角度对复合材料叶轮强度影响较大,而对固有频率影响较小,最优方案为采用[60°/0°/-60°]铺层角度。

The research analysis the strength and natural frequency of the centrifugal impeller made of steel,glass fiber and carbon fiber with different materials and layers by finite element method.The failure for the steel impeller is judged by Von-Mises equivalent stress.The composite impeller is judged by Tsai-Wu failure criterion,and the safety margin is calculated.The results show that the material of impeller has great influence on the strength and natural frequency,the strength of carbon fiber centrifugal impeller is greater than the centrifugal impeller made of steel and glass fiber,which is significant for the light-weighting of the centrifugal impeller and improving the performance of the fan.The ply angle has great influence on the strength of the composite impeller,and it has little effect on the natural frequency.The optimal solution is adopted[60°/0°/-60°]ply angle.