Abstract
The vibration behaviour of a rotor bearing foundation system (RBFS) is affected by its foundation. This paper develops a parameter identification procedure using rotor and foundation motion measurements to identify the modal parameters of an equivalent foundation. The restriction in earlier work to foundations with a diagonal mass matrix is here removed. The procedure is applied to an RBFS comprising a rotor supported by two hydrodynamic bearings mounted on a flexibly supported rigid foundation block. Numerical experiments show that with input data truncated to two digits, satisfactory foundation identification is possible. Thus, the procedure promises to be applicable in the field.
Published Version
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