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以传统的应力-强度干涉模型为基础,考虑了涡轮转子随机结构尺寸、温度应力、转速、外载荷和材料强度等参数的随机性,利用积分随机有限元和Gram-Charlier级数方法对转子局部应力最大处进行可靠性分析.该方法计算结果与Monte-Carlo仿真值比较,二者相对误差非常小,计算结果比较精确,既避免了有限元计算量大和速度慢的情况,又实现了转子随机结构的可靠性计算.
Based on the traditional stress-strength interference model, the randomness of parameters such as turbulent rotor's random structure size, temperature stress, rotational speed, external load and material strength is considered. The integral of stochastic finite element method and Gram-Charlier series The results of the proposed method are compared with the Monte-Carlo simulation results. The relative error between the two methods is very small, and the calculation results are more accurate. This method not only avoids the large amount and slow calculation of the finite element, but also realizes the randomness of the rotor Structural Reliability Calculation.