Experimental Evaluation of a Rotor Model Based Foundation Identification Procedure

摘要

This paper evaluates experimentally a rotor model based foundation identification procedure (in terms of foundation modal parameters) for rotor bearing foundation systems (RBFS). Earlier experimental evaluations used a deficient rotor model and did not properly consider foundation damping. Demonstrated is the need for an accurate dynamic model of the rotor. It is shown that the proposed approach can identify an equivalent foundation which can predict reasonably well the unbalance response of an experimental RBFS rig over the speed range of interest. The proposed identification procedure shows promise for field applications, but further work is required to identify more accurately the modal damping.