中国电机工程学报2025，Vol.45Issue(19)：7600-7610,中插36,12.DOI:10.13334/j.0258-8013.pcsee.241101
超超临界汽轮机裂纹转子的动力响应与特征提取
Dynamic Response and Feature Extraction of Cracked Rotor in Ultra-supercritical Steam Turbine
摘要
Abstract
As one of the common faults that induce shafting vibration of large steam turbine units,crack fault seriously threatens the safety of power production.The enhanced aerodynamic effect of the seal on the rotor in high-parameter steam turbine can aggravate the vibration of the shaft system.In this paper,besides studying the vibration response of the cracked shafting,the dynamic response is analyzed based on the characteristic frequency of the frequency slice wavelet transform(FSWT)method in the refined response within the specified interval,considering the influence of steam excitation and other nonlinear factors on the shafting,.The results show that after the coupled steam flow excitation,the energy conversion and superposition between the frequency doublings in the time domain curve of the cracked shaft system are intensified.When the load of the unit increases,the system gradually changes from a"single-period"chaotic motion to a"two-period"chaotic motion.The span of the first frequency doubling is gradually reduced by 7.64％,11.66％,and 22.69％,and the fourth frequency doubling shows a small"wave-like"change.关键词
超超临界/裂纹/非线性因素/频率切片小波变换/动力响应Key words
ultra-supercritical/cracks/nonlinear factors/frequency slice wavelet transform(FSWT)/dynamic response分类
能源科技引用本文复制引用
曹丽华,于明鑫,李大才,司和勇..超超临界汽轮机裂纹转子的动力响应与特征提取[J].中国电机工程学报,2025,45(19):7600-7610,中插36,12.基金项目
国家自然科学基金项目(面上基金)(52176003).Project Supported by National Natural Science Foundation of China(General Program)(52176003). （面上基金）
