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Proceedings Papers

Frictional Damper Experiences for Reliable, Flexible GTCC Operations

Rishabh Shrivastava, Andreas Kayser, Christian Siewert, Raoul Costamagna, Johannes Tusche, Jaroslaw Szwedowicz
Proc. ASME. GT2024, Volume 10B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V10BT27A029, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-128646
https://doi.org/10.1115/GT2024-128646
View Paper titled, Frictional Damper Experiences for Reliable, Flexible GTCC Operations
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Topics: Blades, Dampers, Gas turbines
Journal Articles

Detection of Cracks in Turbomachinery Blades by Online Monitoring

Manish Kumar, Roger Heinig, Mark Cottrell, Christian Siewert, Henning Almstedt, Drew Feiner, Jerry Griffin
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. April 2023, 145(4): 041023.
Paper No: GTP-20-1830
https://doi.org/10.1115/1.4053705
Published Online: February 27, 2023
View Article titled, Detection of Cracks in Turbomachinery Blades by Online Monitoring
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Topics: Blades, Fracture (Materials)
Proceedings Papers

Rotor-Blade Interaction During Blade Resonance Drive-Through

Roland Grein, Ulrich Ehehalt, Christian Siewert, Norbert Kill
Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT28A003, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59160
https://doi.org/10.1115/GT2021-59160
View Paper titled, Rotor-Blade Interaction During Blade Resonance Drive-Through
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Topics: Blades, Resonance, Rotors, Vibration, Bearings, Combined cycle power stations, Cycles, Fatigue, Plant design, Pressure
Proceedings Papers

Analysis of Intentional Mistuning on the Aeroelastic Stability of Freestanding Last Stage Blade Rows in Steam Turbines

Christian Siewert, Oliver Pütz, Jonas Eigemann
Proc. ASME. GT2020, Volume 9: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Steam Turbine, V009T23A010, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14656
https://doi.org/10.1115/GT2020-14656
View Paper titled, Analysis of Intentional Mistuning on the Aeroelastic Stability of Freestanding Last Stage Blade Rows in Steam Turbines
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Topics: Blades, Stability, Steam turbines, Vibration, Damping, Flutter (Aerodynamics), Computational fluid dynamics, Manufacturing, Mechanical properties, Stiffness
Proceedings Papers

Detection of Cracks in Turbomachinery Blades by Online Monitoring

Manish Kumar, Roger Heinig, Mark Cottrell, Christian Siewert, Henning Almstedt, Drew Feiner, Jerry Griffin
Proc. ASME. GT2020, Volume 9: Oil and Gas Applications; Organic Rankine Cycle Power Systems; Steam Turbine, V009T23A016, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14813
https://doi.org/10.1115/GT2020-14813
View Paper titled, Detection of Cracks in Turbomachinery Blades by Online Monitoring
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Topics: Blades, Crack detection, Turbomachinery, Fracture (Materials), Inspection, Oscillating frequencies, Rotors, Separation (Technology)
Proceedings Papers

Advanced Last Stage Blade for Nuclear Power Plant Upgrades

Christian Siewert, James R. McCracken, Thomas Thiemann
Proc. ASME. GT2019, Volume 8: Microturbines, Turbochargers, and Small Turbomachines; Steam Turbines, V008T29A018, June 17–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: GT2019-90860
https://doi.org/10.1115/GT2019-90860
View Paper titled, Advanced Last Stage Blade for Nuclear Power Plant Upgrades
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Topics: Blades, Nuclear power stations, Damping, Inspection, Steam turbines, Vibration, Design, Electric power generation, Excitation, Power stations
Proceedings Papers

Development of a Last Stage Blade Row Coupled by Damping Elements: Numerical Assessment of its Vibrational Behavior and its Experimental Validation During Spin Pit Measurements

Christian Siewert, Frank Sieverding, William J. McDonald, Manish Kumar, James R. McCracken
Proc. ASME. GT2017, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T29A018, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63630
https://doi.org/10.1115/GT2017-63630
View Paper titled, Development of a Last Stage Blade Row Coupled by Damping Elements: Numerical Assessment of its Vibrational Behavior and its Experimental Validation During Spin Pit Measurements
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Topics: Blades, Damping, Particle spin, Rotation, Spin (Aerodynamics), Stress, Steam, Vibration, Airfoils, Centrifugal force
Proceedings Papers

Optimization of the Vibration Behavior at Speed-Synchronous Resonance of a Large Turbine Blade During Speed-Up and Coast-Down Under Consideration of Mistuning

Bertold Lübbe, Christian Siewert
Proc. ASME. GT2017, Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V008T29A013, June 26–30, 2017
Publisher: American Society of Mechanical Engineers
Paper No: GT2017-63550
https://doi.org/10.1115/GT2017-63550
View Paper titled, Optimization of the Vibration Behavior at Speed-Synchronous Resonance of a Large Turbine Blade During Speed-Up and Coast-Down Under Consideration of Mistuning
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Topics: Optimization, Resonance, Shorelines, Turbine blades, Vibration, Blades, Excitation, Rotors, Transients (Dynamics), Turbines
Journal Articles

Transient Forced Response Analysis of Mistuned Steam Turbine Blades During Startup and Coastdown

Christian Siewert, Heinrich Stüer
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. January 2017, 139(1): 012501.
Paper No: GTP-14-1459
https://doi.org/10.1115/1.4034151
Published Online: August 16, 2016
View Article titled, Transient Forced Response Analysis of Mistuned Steam Turbine Blades During Startup and Coastdown
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Topics: Blades, Disks, Transients (Dynamics), Vibration, Turbines, Steam turbines, Dynamics (Mechanics), Finite element model, Mode shapes, Stiffness
Proceedings Papers

Transient Forced Response Analysis of Mistuned Steam Turbine Blades During Start-Up and Coast-Down

Christian Siewert, Heinrich Stüer
Proc. ASME. GT2014, Volume 1B: Marine; Microturbines, Turbochargers and Small Turbomachines; Steam Turbines, V01BT27A022, June 16–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: GT2014-25654
https://doi.org/10.1115/GT2014-25654
View Paper titled, Transient Forced Response Analysis of Mistuned Steam Turbine Blades During Start-Up and Coast-Down
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Topics: Blades, Shorelines, Steam turbines, Transients (Dynamics), Disks, Vibration, Flutter (Aerodynamics), Dynamics (Mechanics), Eigenvalues, Statistics
Proceedings Papers

Reduced Order Modeling Based on Complex Nonlinear Modal Analysis and its Application to Bladed Disks With Shroud Contact

Malte Krack, Lars Panning-von Scheidt, Jörg Wallaschek, Christian Siewert, Andreas Hartung
Proc. ASME. GT2013, Volume 7B: Structures and Dynamics, V07BT31A010, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-94560
https://doi.org/10.1115/GT2013-94560
View Paper titled, Reduced Order Modeling Based on Complex Nonlinear Modal Analysis and its Application to Bladed Disks With Shroud Contact
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Topics: Disks, Modal analysis, Modeling, Damping, Design, Flutter (Aerodynamics), Limit cycles, Oscillations, Resonance, Algebra
Proceedings Papers

Multiharmonic Analysis and Design of Shroud Friction Joints of Bladed Disks Subject to Microslip

Malte Krack, Anna Herzog, Lars Panning-von Scheidt, Jörg Wallaschek, Christian Siewert, Andreas Hartung
Proc. ASME. IDETC-CIE2012, Volume 1: 24th Conference on Mechanical Vibration and Noise, Parts A and B, 1083-1092, August 12–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: DETC2012-70184
https://doi.org/10.1115/DETC2012-70184
View Paper titled, Multiharmonic Analysis and Design of Shroud Friction Joints of Bladed Disks Subject to Microslip
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Topics: Design, Disks, Friction, Resonance, Vibration, Ansätze (Mathematics), Coulombs, Damping, Dynamics (Mechanics), Elasticity
Journal Articles

Reduced Order Modeling Based on Complex Nonlinear Modal Analysis and Its Application to Bladed Disks With Shroud Contact

Malte Krack, Lars Panning-von Scheidt, Jörg Wallaschek, Christian Siewert, Andreas Hartung
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. October 2013, 135(10): 102502.
Paper No: GTP-13-1187
https://doi.org/10.1115/1.4025002
Published Online: August 30, 2013
View Article titled, Reduced Order Modeling Based on Complex Nonlinear Modal Analysis and Its Application to Bladed Disks With Shroud Contact
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Topics: Damping, Design, Disks, Excitation, Friction, Modal analysis, Resonance, Vibration, Limit cycles, Optimization
Proceedings Papers

Robust Design of Friction Interfaces of Bladed Disks With Respect to Parameter Uncertainties

Malte Krack, Lars Panning, Jörg Wallaschek, Christian Siewert, Andreas Hartung
Proc. ASME. GT2012, Volume 7: Structures and Dynamics, Parts A and B, 1193-1204, June 11–15, 2012
Publisher: American Society of Mechanical Engineers
Paper No: GT2012-68578
https://doi.org/10.1115/GT2012-68578
View Paper titled, Robust Design of Friction Interfaces of Bladed Disks With Respect to Parameter Uncertainties
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Topics: Design, Disks, Friction, Uncertainty, Coulombs, Damping, Equations of motion, Excitation, Optimization, Probability
Proceedings Papers

Forced Response Analysis of Mistuned Turbine Bladings

Christian Siewert, Heinrich Stu¨er
Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 1145-1156, June 14–18, 2010
Publisher: American Society of Mechanical Engineers
Paper No: GT2010-23782
https://doi.org/10.1115/GT2010-23782
View Paper titled, Forced Response Analysis of Mistuned Turbine Bladings
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Topics: Damping, Disks, Dynamics (Mechanics), Stiffness, Turbines
Proceedings Papers

A Substructure Based Reduced Order Model for Mistuned Bladed Disks

Andreas Hohl, Christian Siewert, Lars Panning, Jo¨rg Wallaschek
Proc. ASME. IDETC-CIE2009, Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B, 899-906, August 30–September 2, 2009
Publisher: American Society of Mechanical Engineers
Paper No: DETC2009-87459
https://doi.org/10.1115/DETC2009-87459
View Paper titled, A Substructure Based Reduced Order Model for Mistuned Bladed Disks
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Topics: Disks, Blades, Waves, Degrees of freedom, Modal analysis
Journal Articles

Multiharmonic Forced Response Analysis of a Turbine Blading Coupled by Nonlinear Contact Forces

Christian Siewert, Lars Panning, Jörg Wallaschek, Christoph Richter
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082501.
https://doi.org/10.1115/1.4000266
Published Online: May 26, 2010
View Article titled, Multiharmonic Forced Response Analysis of a Turbine Blading Coupled by Nonlinear Contact Forces
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Topics: Turbines, Vibration, Displacement, Friction, Blades, Excitation, Stiffness, Stress, Failure
Journal Articles

Eddy Current Damping: A Concept Study for Steam Turbine Blading

Jacob Laborenz, Christian Siewert, Lars Panning, Jörg Wallaschek, Christoph Gerber, Pierre-Alain Masserey
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2010, 132(5): 052505.
https://doi.org/10.1115/1.3205032
Published Online: March 5, 2010
View Article titled, Eddy Current Damping: A Concept Study for Steam Turbine Blading
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Topics: Damping, Eddies (Fluid dynamics), Eddy currents (Electricity), Blades, Vibration, Steam turbines
Proceedings Papers

Eddy Current Damping: A Concept Study for Steam Turbine Blading

Jacob Laborenz, Christian Siewert, Lars Panning, Jo¨rg Wallaschek, Christoph Gerber, Pierre-Alain Masserey
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 333-342, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59593
https://doi.org/10.1115/GT2009-59593
View Paper titled, Eddy Current Damping: A Concept Study for Steam Turbine Blading
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Topics: Damping, Eddies (Fluid dynamics), Eddy currents (Electricity), Steam turbines, Blades, Dampers, Failure, Friction, High cycle fatigue, Machinery
Proceedings Papers

Multiharmonic Forced Response Analysis of a Turbine Blading Coupled by Nonlinear Contact Forces

Christian Siewert, Lars Panning, Jo¨rg Wallaschek, Christoph Richter
Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 231-243, June 8–12, 2009
Publisher: American Society of Mechanical Engineers
Paper No: GT2009-59201
https://doi.org/10.1115/GT2009-59201
View Paper titled, Multiharmonic Forced Response Analysis of a Turbine Blading Coupled by Nonlinear Contact Forces
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Topics: Blades, Centrifugal force, Damage, Damping, Design, Displacement, Energy dissipation, Excitation, Failure, Friction