论文部分内容阅读
数字化逆向建立风扇叶片结构分析模型,以叶片模态试验为基础,并结合有限元法建立了叶片振动分析模型;考虑气流扰动作用,建立旋转叶片流场分析模型;取慢车、巡航和起飞为关键工况,获取相应工况下的叶片气动载荷,考虑离心和气动载荷共同作用,计算得到叶片应力分布,分析气动载荷作用对叶片应力及强度的影响。分析发现:考虑气动载荷的叶片应力分布及强度更满足实际工程应力与强度分析需求;该叶片的应力集中位置主要出现在叶片中部,但它们均满足结构强度设计标准的要求。
Based on the blade modal test and the finite element method, the vibration analysis model of the blade was established based on the numerical simulation of the blade structure. The flow field analysis model of the rotating blade was established considering the disturbance of the air flow. It is the key to take the slow car, cruise and take-off The aerodynamic loads of the blades under the corresponding operating conditions were obtained. The interaction between centrifugal and aerodynamic loads was taken into account. The stress distribution of the blades was calculated and the influence of aerodynamic loads on the stress and strength of the blades was analyzed. The analysis shows that the stress distribution and strength of the blade considering the aerodynamic load more meet the needs of actual engineering stress and strength analysis. The stress concentration of the blade mainly occurs in the middle of the blade, but they all meet the requirements of structural strength design standards.