【作者】 费成巍； 白广忱；

【Author】 FEI Chengwei,BAI Guangchen (School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing,100191,China)

【机构】 北京航空航天大学 能源与动力工程学院；

【摘要】 为了准确地描述涡轮叶片径向变形规律,本文考虑了材料属性的非线性、机械载荷和热载荷的动态性,利用极值响应面方法(Extremum Response Surface Method,ERSM)对叶片径向变形进行非线性动态概率分析。介绍了ERSM概率分析的基本思想,并建立了其数学模型;利用ERSM进行了叶片径向变形概率分析,得到了叶片径向变形和各随机参量的分布特征、概率分布,以及找到了影响叶片径向变形的主要因素燃气温度和转速。通过方法比较,展示了ERSM能在保证计算精度的前提下大大减少计算时间,提高计算效率;验证了该方法的可行性和有效性,为进一步进行叶片设计和优化,以及叶尖间隙设计和控制提供了量化依据。更多还原

【Abstract】 To accurately describe turbine blade radial deformation,Extremum Response Surface Method(ERSM) was applied in the nonlinear dynamic probalistic analysis of turbine blade radial deformation fully considering the material nonlinearity and the dynamic of mechanical load and heat load.The ERSM thought was introduced and its mathematical model was established for probabilistic analysis firstly.Through the probabilistic analysis,it is available to the the probabilistic distributions of blade deformation and input variables; meanwhile,the gas temperature and rotor speed are demonstrated to be the important factors impacting on the blade deformation.As shown by the comparsion of methods,the ERSM can geatly reduce the computational time and improve the calculation efficiency while keeping the precision in nonlinear dynamic probabilistic analysis so that a quantitative reference is provided further for more reasonably designing the blade and even designing and controlling turbine blade-tip clearance.更多还原