Bladed Disk Assemblies

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Presentation transcript:

Order-Tuned Vibration Absorbers for Cyclic Rotating Flexible Structures

Bladed Disk Assemblies Background Bladed Disk Assemblies Note that deceleration is directly proportional to…

Engine Order Excitation Background Engine Order Excitation

Conditions for Resonance Background Conditions for Resonance

Vibration Reduction via Order-Tuned Absorbers Background Vibration Reduction via Order-Tuned Absorbers

Self-tuning Impact Damper Background Self-tuning Impact Damper Turbine Blade Sleeves Tuned Dampers Chamber & End Caps

Free Vibration – One DOF/Sector Vibration Characteristics Free Vibration – One DOF/Sector

Free Vibration – One DOF/Sector Vibration Characteristics Free Vibration – One DOF/Sector

Free Vibration – One DOF/Sector Vibration Characteristics Free Vibration – One DOF/Sector

Free Vibration – One DOF/Sector Vibration Characteristics Free Vibration – One DOF/Sector

Free Vibration – One DOF/Sector Vibration Characteristics Free Vibration – One DOF/Sector

Bladed Disk Assembly with Absorbers Mathematical Model Bladed Disk Assembly with Absorbers Note that deceleration is directly proportional to…

Linearized System Model Mathematical Model Linearized System Model

Block Decoupling the EOM Modal Analysis Block Decoupling the EOM

Steady-State Modal Response Modal Analysis Steady-State Modal Response

Steady-State Modal Response Modal Analysis Steady-State Modal Response

Steady-State Modal Response Modal Analysis Steady-State Modal Response

Special Cases Blades Locked, Absorbers Free Gives Absorber Tuning Order Blades Free, Absorbers Locked A Benchmark to evaluate absorber performance Single Isolated Sector, Blade/Absorber Free Demonstrates the essential features of the full coupled system

Blades Locked, Absorbers Free Special Case 1 Blades Locked, Absorbers Free

Blades Free, Absorbers Locked Special Case 2 Blades Free, Absorbers Locked

Blades Free, Absorbers Locked Special Case 2 Blades Free, Absorbers Locked

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

Single Isolated Sector, Blade/Absorber Free Special Case 3 Single Isolated Sector, Blade/Absorber Free

N = 10 Sectors, Blades/Absorbers Free Linear Forced Response N = 10 Sectors, Blades/Absorbers Free

Linear Forced Response MOVIE

The Effects of Detuning: No-Resonance Gap Linear Forced Response The Effects of Detuning: No-Resonance Gap

Summary of Frequency Response Linear Forced Response Summary of Frequency Response

Directions for Future Work Summary Linear, Perfectly Periodic System Blades/Absorbers: absorber effective Eigenfrequency structure: no resonance zone Directions for Future Work Effects of damping Effects of mistuning General-path absorbers Multi-DOF blade models Nonlinear effects Intentional mistuning