A method to determine the size of notch on first stage blade of compressor with a stress concentrated factor (K t) of three is briefly introduced,which is required for foreign object damage (FOD)testing of aeroengines...A method to determine the size of notch on first stage blade of compressor with a stress concentrated factor (K t) of three is briefly introduced,which is required for foreign object damage (FOD)testing of aeroengines.It is based on 8-node and 20-node finite element appoaches respectively.The 8-node super-parameter element approach is used to calculate the stress distribution of a whole blade without and with notch,and the 20-node 3D iso-parameter finite element programm is applied to computation of local stress distribution around a notch of blade.The practical testing techniques and test results are also presented.展开更多
Three dimensional finite element method is applied to stress analysis of the original and the redesigned propeller blade taking the loads,such as centrifugal and dynamical loads.In respect of stress distribution,the a...Three dimensional finite element method is applied to stress analysis of the original and the redesigned propeller blade taking the loads,such as centrifugal and dynamical loads.In respect of stress distribution,the airfoil of the redesigned propeller blade is more reasonable.Its stress distribution approaches to isostrength,and safety coefficient also meets the given specification.Therefore,the redesigned propeller blade is an quite advanced design.展开更多
Three dimensional finite element method is applied to stress analysis of a propeller hub taking centrifugal load,aerodynamical moment and blade centrifugal tension load.Since its construction is complicated,loads are ...Three dimensional finite element method is applied to stress analysis of a propeller hub taking centrifugal load,aerodynamical moment and blade centrifugal tension load.Since its construction is complicated,loads are various and its stress distribution is hard to analyze,the elastic stress plus principle is employed for this purpose.The analytical results show that the blade centrifugal tension load is predominant and its construction has been optimized to a certain extent due to current improvements during long time of its service and modifications so the stress distributions of its parts are quite even and reasonable,moreover safety coefficients are large enough.展开更多
文摘A method to determine the size of notch on first stage blade of compressor with a stress concentrated factor (K t) of three is briefly introduced,which is required for foreign object damage (FOD)testing of aeroengines.It is based on 8-node and 20-node finite element appoaches respectively.The 8-node super-parameter element approach is used to calculate the stress distribution of a whole blade without and with notch,and the 20-node 3D iso-parameter finite element programm is applied to computation of local stress distribution around a notch of blade.The practical testing techniques and test results are also presented.
文摘Three dimensional finite element method is applied to stress analysis of the original and the redesigned propeller blade taking the loads,such as centrifugal and dynamical loads.In respect of stress distribution,the airfoil of the redesigned propeller blade is more reasonable.Its stress distribution approaches to isostrength,and safety coefficient also meets the given specification.Therefore,the redesigned propeller blade is an quite advanced design.
文摘Three dimensional finite element method is applied to stress analysis of a propeller hub taking centrifugal load,aerodynamical moment and blade centrifugal tension load.Since its construction is complicated,loads are various and its stress distribution is hard to analyze,the elastic stress plus principle is employed for this purpose.The analytical results show that the blade centrifugal tension load is predominant and its construction has been optimized to a certain extent due to current improvements during long time of its service and modifications so the stress distributions of its parts are quite even and reasonable,moreover safety coefficients are large enough.
