MODAL ANALYSIS OF A TURBO-PUMP SHAFT: AN INNOVATIVE SUSPENDING METHOD TO IMPROVE THE RESULTS
Publish place: International Journal of Industrial Engineering & Production Research، Vol: 19، Issue: 7
Publish Year: 1387
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJIEPR-19-7_006
تاریخ نمایه سازی: 7 شهریور 1393
Abstract:
Modal parameter extraction of high speed shafts is of critical importance in mechanical design of turbo-pumps. Due to the complex geometry and peripheral components of turbo-pumps, difficulties can arise in determination of modal parameters. In this study, modal properties of a turbo-pump shaft, was studied by experimental modal analysis, and using different excitation techniques. An innovative suspending method is proposed to reduce noise-to-signal ratio, resulting from classic suspensions. Comparison of the experimental results obtained from the proposed suspension method and the traditional ones shows that the proposed approach was a promising method, when classic methods fall short of expectations in analysis of complex structures. To validate the experimental results, numerical solution was carried out using simplified geometric modeling combined with the Finite Element Method. The simplified modeling approach can be considered as a reliable theoretical method for numerical modal analysis of similar structures. Comparison of experimental and numerical results shows that there is a good conformity between the results of two approaches.
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Authors
M.H. Sadeghi
are with the Department of Mechanical Engineering University of Tabriz, Imam Khomeini Street, ۲۹th Bahman Boulevard, Tabriz, Iran,
S. Jafari
are with the Department of Mechanical Engineering University of Tabriz, Imam Khomeini Street, ۲۹th Bahman Boulevard, Tabriz, Iran,
B. Nasseroleslami
is with the Department of Mechanical Engineering Sharif University of Technology, Tehran,Iran