航空发动机外部管路调频的有限元计算方法

利用有限元方法对航空发动机外部管路模态进行了计算,得到了管路的固有频率及模态振型;通过计算,分析了安装不同数量、位置的卡箍对管路固有频率的影响,以此为依据进行了管路调频,避免了管路共振的发生。

Finite Element Analysis Method of Frequency Modulation for Aeroengine External lines

the poor explanation of fault diagnosis results and dependence of fault analysis on specialized experience for complicated rotor system wavelet packet method were solved by incorporating wavelet packet analysis and CBD into the rotor system fault diagnosis. The explanation of fault diagnosis results was improved by the case that rotor system fault was characterized with fault characteristic extractedusing wavelet packet technology and in the processs of dealing with the present problems using similar casesobtained flora retrieval technique. The simulation results prove the validity of the method.