Page 10 - Steam Turbines--Design, Applications, and Rerating by Heinz-Bloch, Murari-Singh
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Contents ix
Chapter 9. Couplings and Coupling Considerations 157
9.1 Power Transmission 157
9.2 Shaft Alignment 160
9.3 Maintenance 162
9.4 Influence on the Critical Speeds 162
9.5 Differential Expansions 162
9.6 Axial Thrusts 163
9.7 Limits of Application 163
Chapter 10. Rotor Dynamics Technology 165
10.1 Rotor Model 165
10.2 Dynamic Stiffness 166
10.3 Effects of Damping on Critical Speed Prediction 169
10.4 Bearing-Related Developments 170
10.5 Refinements 172
10.6 Bearing Support Considerations 173
10.7 Foundations 174
10.8 Impedance 174
10.9 Partial Arc Forces 178
10.10 Design Procedure 179
10.11 Rotor Response 180
10.12 Instability Mechanisms 180
10.13 Subsynchronous Vibration 180
10.14 Service Examples 183
10.15 Labyrinth and Cover Seal Forces 185
10.16 Rotor Stability Criteria 187
10.17 Experimental Verification 187
Chapter 11. Campbell, Goodman, and SAFE Diagrams for Steam
Turbine Blades 189
11.1 Goodman Diagram 189
11.2 Goodman-Soderberg Diagram 190
11.3 Campbell Diagram 191
11.3.1 Exciting frequencies 195
11.4 SAFE Diagram—Evaluation Tool for Packeted Bladed Disk Assembly 197
11.4.1 Definition of resonance 198
11.4.2 Mode shape 198
11.4.3 Fluctuating forces 200
11.5 SAFE Diagram for Bladed Disk Assembly 203
11.6 Mode Shapes of a Packeted Bladed Disk 209
11.7 Interference Diagram Beyond N/2 Limit 211
11.8 Explaining Published Data by the Use of Dresser-Rand’s SAFE Diagram 214
11.9 Summary 217
Chapter 12. Reaction vs. Impulse Type Steam Turbines 219
12.1 Introduction 219
12.2 Impulse and Reaction Turbines Compared 220
