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- W9183994 abstract "An attractive approach for identifying the dynamic stiffness of a rotating machinery foundation is to identify the relevant modal parameters of an equivalent foundation, using for the identification the motion measurements of the rotor and the foundation at the bearing supports. Earlier procedures required the identification of all assumed vibrating modes, even if the highest assumed mode frequency turned out to be well outside the operating speed range of interest. This paper overcomes such problems by enhancing the earlier identification technique to solve accurately for fewer modes than actually assumed; essentially by generalising the technique to be able to handle rectangular modal matrices. Numerical experiments show that this enhanced technique allows one to assume more degrees of freedom than actually necessary, yet still identify all the relevant vibration modes while ignoring unnecessary ones. The new identification procedure is robust in that good equivalent foundations are identified even when the measurement data is truncated to two digits and is therefore likely to be applicable in the field." @default.
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- W9183994 date "2012-01-01" @default.
- W9183994 modified "2023-09-25" @default.
- W9183994 title "Identification of foundations in rotating machinery using modal parameters" @default.
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- W9183994 doi "https://doi.org/10.1533/9780857094537.2.89" @default.
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