Study of start-up vibration response for oil whip and dry whip through Hilbert Huang Transform

Chen Chao Fan, Jhe Wei Syu, Min Chun Pan, Wen Chang Tsao

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

Oil whip induces self-excited vibration in fluid-handling machines, and what is worse, it can cause self-excited reverse precessional full annular rub, known as "dry whip" which is a secondary phenomenon resulting from a primary cause and may lead to a catastrophic failure of machines; that is, "coincidence of oil whip and dry whip" that occurs repeatedly with constant frequency and amplitude in small clearance cases of fluid-handling machines. Early detection of rub malfunction is essential to avoid damage. Hilbert Huang Transform, which included an empirical mode decomposition and Hilbert spectral analysis, is applied. Hilbert Huang Transform is a great method for analyzing non-linear and non-stationary signals, such as rotor startup signals. Hilbert Huang Transform clearly indicates instability at its initiation stage, and energy concentration changes by different stages. Malfunctions like rub can not observe by Hilbert spectrum. Hilbert spectrum combining full spectrum is developed, as know full Hilbert spectrum, to interpret the rub. The coincidence of oil whip and dry whip is observed definitely through FHS. The advantage of the full Hilbert spectrum is to offer a faster, more efficient method to diagnose fluid-induced instability.

原文???core.languages.en_GB???
主出版物標題ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011
頁面83-87
頁數5
版本PARTS A AND B
DOIs
出版狀態已出版 - 2011
事件ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011 - Washington, DC, United States
持續時間: 28 8月 201131 8月 2011

出版系列

名字Proceedings of the ASME Design Engineering Technical Conference
號碼PARTS A AND B
1

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???event.eventtypes.event.conference???ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011
國家/地區United States
城市Washington, DC
期間28/08/1131/08/11

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