Development of a Rotor Model Considering the Crack Propagation due to Fatigue and the Method for Vibration Diagnosis and Prognostics of the Crack Growth

达到了以下3个目的。(1)【裂纹转子振动解析方法的开发】开发了非对称弹簧特性支撑的开口裂纹转子振动解析方法，并进行了实验验证。(2)[裂纹模型的开发]开发了开放裂纹和呼吸裂纹的模型。此外，为确认模型，进行了两年的产生呼吸裂纹的疲劳试验。(3)【含呼吸裂纹转子振动数值计算方法的开发】建立了含呼吸裂纹转子模型，开发了含呼吸裂纹转子亚共振振动数值计算方法。

The following 3 purposed were achieved.(1) [Development of the analytical method of the vibration of the cracked rotor] The analytical method of the vibration of the rotor with open crack supported by the asymmetric spring characteristic was developed and verified experimentally. (2) [Development of the model of the crack] The models of the open crack and the breathing crack were developed. Also, the fatigue test for generating the breathing crack were performed for two years to confirm the model. (3) [Development of the numerical method for the vibration of the rotor with breathing crack] The rotor model with breathing crack was constructed, and the numerical method for the vibration at the sub-resonances due to breathing crack was developed.