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提出了一种利用有限元计算结果、通过模式搜索法来确定有关惯性环节系数的方法.该方法将冷态启动、热态启动和极热态启动过程的汽轮机转子有限元法计算所得体积平均温度作为标准值,通过优化搜索来确定惯性环节法计算汽轮机转子体积平均温度的并联惯性环节的个数,以及每个惯性环节的时间常数和权重系数.通过温态启动过程的汽轮机转子有限元法和惯性环节法计算所得体积平均温度的对比,来验证该方法计算所得系数的精度和易用性.结果表明:该方法所得的常数和系数满足工程应用的精度要求,为汽轮机转子的热应力优化控制和汽轮机变负荷运行的安全性提供了技术支持.
A new method to determine the inertial link coefficient is proposed by using the finite element method and the pattern search method.The method uses the Finite Element Method of Turbine Rotor in cold start, hot start and extreme hot start to calculate the volume average temperature As a standard value, the number of shunt inertia joints and the time constant and weight coefficient of each inertia joint are determined by the optimization method to find the average temperature of steam turbine rotor volume.According to the finite element method The results show that the constants and coefficients obtained by this method satisfy the precision requirements of engineering application and provide the optimal control for thermal stress of steam turbine rotor And turbine safety and variable load operation to provide technical support.