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动力涡轮轴在工作时承受着较大离心载荷、预紧力载荷、热载荷以及扭矩载荷等,为提高动力涡轮轴的安全性,研究其可靠性具有重要的现实意义,以动力涡轮轴为研究对象,考虑材料性能、结构尺寸和载荷参数的随机性,对其进行参数化建模,通过混合模拟(有限元、响应面、改进一次二阶矩法三者结合)的方法对其进行可靠性分析,该方法计算量小、拟合精度高、速度快。
In order to improve the safety of the power turbine shaft, it is of great practical significance to study the reliability of the power turbine shaft. At the same time, the research on the power turbine shaft The object, considering the randomness of material properties, structural dimensions and load parameters, is parametrically modeled, and its reliability is evaluated by means of hybrid simulation (finite element, response surface, improved first order second moment method) Analysis, the method of calculation is small, high precision, fast.