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研究具有不确定复合材料参数的某型直升机涵道尾桨的固有频率。基于区间数学,将不确定复合材料参数用区间定量化,结合有限元刚度矩阵和质量矩阵的参数分解模型提出了一种估计其固有频率的区间参数顶点法。尾桨的建模、计算及后处理工作均是在大型工程分析软件ANSYS8.0中完成的,结果表明了区间分析方法的实用性和有效性。
The natural frequency of a tail rotor of a helicopter culvert with uncertain composite parameters is studied. Based on the interval mathematics, an interval parameter vertex method for estimating the natural frequency of an uncertain composite material is proposed by using the interval quantification method and the finite element stiffness matrix and mass parameter decomposition model. Tail rotor modeling, calculation and post-processing work are completed in the large-scale engineering analysis software ANSYS8.0, the results show that the method of interval analysis of practicality and effectiveness.