Vibration Analysis and Damping Strategies in Bladed Disk Systems
Summary
Modern turbomachinery relies on bladed disk assemblies to convert energy in aviation and power generation, yet these components are prone to high-cycle fatigue induced by vibratory loads. Vibration analysis in such systems addresses the identification of natural frequencies, mode shapes and resonant interactions, accounting for manufacturing variations known as mistuning. Both linear modal techniques and nonlinear time-domain simulations are employed to predict dynamic response, with particular focus on contact interfaces between blades and damping devices. Damping strategies range from passive friction dampers located under the platform to active systems employing piezoelectric or elastomeric elements. Recent advances integrate high-fidelity finite-element solvers with reduced-order models to capture stick–slip phenomena, contact stiffness variations and wear over service life. Improved characterisation of material interfaces, coupled with optimisation of damper geometry, has enhanced reliability and extended operational margins. These developments underpin safer, more efficient turbomachinery with lower maintenance costs and reduced environmental impact.
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Vibration Analysis and Damping Strategies in Bladed Disk Systems publication trend
The graph below shows the total number of articles in vibration analysis and damping strategies in bladed disk systems across all publications each year (not limited to Nature Index journals).
Technical terms
Mistuning: Variation in blade properties leading to altered natural frequencies and localisation of vibration energy.
Under-platform damper (UPD): A passive friction device beneath the blade platform that dissipates vibratory energy via sliding contact.
Friction damping: Energy dissipation mechanism arising from relative motion and frictional forces at contact interfaces.
Stick–slip: Alternating phases of static adhesion and dynamic sliding at a contact interface, driving nonlinear response.
Contact stiffness: Tangential stiffness of the interface between damper and blade platform, influencing hysteretic energy loss.
References
- Friction damping for turbomachinery: A comprehensive review of modelling, design strategies, and testing capabilities. Progress in Aerospace Sciences (2024).
- Nonlinear dynamics of turbine bladed disk with friction dampers: Experiment and simulation. International Journal of Mechanical Sciences (2023).
- A general geometrical theory of turbine blade underplatform asymmetric dampers. Mechanical Systems and Signal Processing (2023).
- Active Elastic Support/Dry Friction Damper with Piezoelectric Ceramic Actuator. Shock and Vibration (2014).
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