ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Forced vibration and liquid corrosion are important reasons for last stage blade failure insteam turbine. In order to improve reliability of blades in wet steam stages, the dynamic stress andthe liquid-solid impact stress of blade were analyzed firstly, then Neuber’s rule, rainflow countingmethod and improved cumulative damage rule were introduced to develop a new model to evaluateservice life of last stage blade. Many factors such as manufacturing quality, metal quality andoperation status were considered, so it is more reasonable for service life assessment of last stageblade. At last, the service life of a last stage blade of 680mm was analyzed and the resultapproximates the practical service life. It is shown the new fatigue model can give some significantdata and is usable for engineering application
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.348-349.613.pdf
Permalink