论文部分内容阅读
采用蒙特卡罗仿真方法对某型发动机第一级涡轮转子叶片进行可靠性分析,考虑了稳定工作条件下稳态温度场对涡轮叶片的影响,忽略振动载荷及气动载荷。根据场序热-结构耦合方法对涡轮叶片进行了确定性热应力分析,然后通过大量蒙特卡罗仿真试验对涡轮叶片应力的概率分布进行了分析求解,求解过程中采用了模型数据文件与温度载荷数据文件循环调用的方法,对影响涡轮叶片应力状况的随机因素进行了灵敏度分析。以不考虑温度场情况下的分析作为对比参照,根据对比发现在温度场作用下涡轮叶片材料弹性模量的分散性对叶片可靠性较常温状况下有较大的影响,且常温状况下叶片可靠度的计算结果偏高。
The Monte Carlo simulation method is used to analyze the reliability of the first stage turbine rotor blades of a certain type of engine. The influence of the steady temperature field on the turbine blades under steady working conditions is considered, and the vibration load and the aerodynamic load are neglected. According to the field-sequential thermo-structural coupling method, the deterministic thermal stress of the turbine blade is analyzed, and then the Monte Carlo simulation test is used to analyze and solve the probability distribution of turbine blade stress. The model data file and the temperature load Data file cycle call method, the sensitivity analysis of the random factors that affect the stress status of turbine blades. Taking the analysis without considering the temperature field as a contrast reference, it is found that the dispersion of the elastic modulus of the turbine blade under the action of the temperature field has greater influence on the reliability of the blade at room temperature, and the blade is reliable under normal temperature Degree of high-level calculation results.