【摘要】 提出一种基于应力-强度干涉模型的转子系统圆弧端齿连接结构可靠性评估方法。在有限元软件中建立参数化有限元模型，通过有限元计算筛选出应力敏感性较高的部分几何尺寸，同材料参数和载荷一起作为影响应力分布的输入变量，圆弧端齿的最大等效应力为输出变量；为了减少庞大的有限元计算量，使用响应面来获取不同输入变量组合时的输出变量；应用Monte-carlo法与响应面法结合求出最大等效应力的分布形式；以服从某种分布的应力与通过拟合样本数据得到的服从某种分布的强度构成应力-强度干涉模型，并求得圆弧端齿连接结构的可靠度。更多还原

【Abstract】 A stress-strength interference model-based reliability assessment method for rotor system curvic couplings is proposed. A parametric finite element model is established in the finite element software, and by finite element calculations some geometric dimensions with high stress sensitivity are screened out, which are used as input variables affecting stress distribution together with material parameters and loads, while the maximum equivalent force of circular end tooth is the output variable. In order to reduce the huge amount of finite element calculation, the response surface is used to obtain the output variables when different input variables are combined. The Monte-carlo method is applied in combination with the response surface to find out the distribution form of the maximum equivalent force. The stresses obeying a certain distribution and the strengths obeying a certain distribution obtained by fitting the sample data constitute a stress-strength interference model, and the reliability of the curvic couplings is obtained.更多还原