CAJ | 학술논문

以概率论和断裂力学为基础，考虑参数的不确定性和随机性，应用蒙特卡洛方法对再制造叶轮的疲劳寿命进行分析。结果表明，采用蒙特卡洛方法进行的一定可靠度和置信度下的寿命预测反映了参数的不确定性，较传统的断裂力学计算结果更安全；初始裂纹尺寸、断裂韧性、变异系数、气动载荷对疲劳扩展寿命的影响较大；将概率断裂力学应用于叶轮的疲劳寿命预测中，为相关叶轮的设计、检修提供了参考。
이개솔론화단렬역학위기출，고필삼수적불학정성화수궤성，응용몽특잡락방법대재제조협륜적피로수명진행분석。결과표명，채용몽특잡락방법진행적일정가고도화치신도하적수명예측반영료삼수적불학정성，교전통적단렬역학계산결과경안전；초시렬문척촌、단렬인성、변이계수、기동재하대피로확전수명적영향교대；장개솔단렬역학응용우협륜적피로수명예측중，위상관협륜적설계、검수제공료삼고。
The fatigue life of the remanufacturing impeller can be predicted by using the Monte Carlo ( M-C) method and the Probabilistic Fracture Mechanics ( PFM) with consideration of the uncertainty and the randomness of the parameters. Results indicate that the M-C method with PFM method is more reliable and safer for the design of the impeller with comparison to the traditional fracture mechanics method. The initial crack length, the fracture toughness, the coefficient of variation and aerody-namic forces can significantly affect the remaining fatigue life of the impeller. PFM is applied to the fatigue life prediction of the impeller and provides reference for design and maintenance of the impeller.