论文部分内容阅读
为了准确设计高压涡轮盘和叶尖间隙,从概率的角度进行了涡轮盘径向变形的分析。介绍了高精度高效率的非线性动态概率分析的极值响应面方法 (Extremum Response Surface Method,ERSM),并建立了其数学模型。考虑材料属性和边界条件的非线性,以及热载荷和离心载荷的动态性,基于ERSM对涡轮盘径向变形进行了非线性动态概率分析,得到了输入输出参数的分布特征和影响涡轮盘径向动态变形的主要因素。最后,通过方法比较,验证了ERSM在保证计算精度的前提下能大大提高计算速度,节约计算时间,改善计算效率。为进行更有效的涡轮盘设计和优化,改善叶尖间隙设计和控制的合理性提供了有效依据。
In order to accurately design the high-pressure turbine disk and tip clearance, the radial disk deformation analysis is carried out from the perspective of probability. The Extremum Response Surface Method (ERSM) of nonlinear dynamic probability analysis with high precision and high efficiency is introduced and its mathematical model is established. Taking into account the nonlinearity of material properties and boundary conditions, as well as the dynamics of thermal load and centrifugal load, nonlinear dynamic probabilistic analysis of radial deformation of turbine disk based on ERSM is carried out. The distribution characteristics of input and output parameters and the influence of radial load Dynamic deformation of the main factors. Finally, the method is compared to verify that the ERSM can greatly improve the computational speed, save the computational time and improve the computational efficiency under the premise of ensuring the computational accuracy. It provides an effective basis for more effective design and optimization of turbine disk and improving the rationality of tip clearance design and control.