Documentation Vibrations within nuclear applications

Expert seminar on vibrations ans rotordynamics in nuclear applications

On February 10, 2015, the Energiforsk Vibrations research program held an expert seminar on vibrations and rotordynamics within nuclear applications was held with German Professor Rainer Nordmann. The program and documentation are found below:

 8.45

Welcome and introduction

MonikaAdsten, Energiforskand Tobias Törnström, OKG

9.00

Lateral Vibrations in Large Steam Turbo Sets

•Modeling of the Rotor system for lateral vibrations and equations of motion

•Eigenvalues (natural frequencies, damping) and lateral mode shapes (bending)

•Sources of self-excited Vibrations, Stability charts

Forced Unbalance harmonic vibrations. Run up vibration amplitude curvesversus speed.

•ISO Standards for lateral vibrations in Turbomachinery systems

 

9.45

Coffee

10.00

Rotor Structure Interactions (RSI) in High Performance Large Turbomachinery Systems
•Modeling of the Rotor-Structure-System for lateral vibrations and equations of motions

•Forced Unbalance Response for Rotor-Foundation-Systems of large Steam Turbo Sets

•Simplified modeling of the foundation by means of SDOF systems at the bearing locations

•Improved modeling of the foundation by means of Frequency Response Functions (FRF)

•Influence of the foundation to the Forced Unbalance Response of large Steam Turbo Sets

 

10.45

Coffee

11.00

Fluid Structure Interactions (FSI) in High Performance Large Turbomachinery Systems
•Fluid Structure Interactions (FSI) in fluid film bearings and seals

•Basic equations for fluid structure interactions

•Rotordynamiccoefficients of bearings and seals: stiffness, damping and inertia coefficients

Influence of FSI to the lateral vibrations: Self-excited vibrations and forced unbalance response

•Stability charts for different bearing types

 

 

 


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