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RISMulti-Wave Vibration Caused by Flutter Instability and Nonlinear Tip-Shroud Friction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Measurements revealed the contribution of multiple traveling waves to the flutter vibrations of bladed disks. Saturated flutter vibration, whether in this multi-wave or in its better-understood single-wave form, is a ...
Effect of Modal Interactions on Friction-Damped Self-Excited Vibrations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It is well-known that nonlinear dry friction damping has the potential to bound the otherwise unboundedly growing vibrations of self-excited structures. An important technical example are the flutter-induced friction-damped ...
Analysis of the Effect of Multirow and Multipassage Aerodynamic Interaction on the Forced Response Variation in a Compressor Configuration—Part II: Effects of Additional Structural Mistuning
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The prediction of aerodynamic blade forcing is a very important topic in turbomachinery design. Usually, the wake from the upstream blade row and the potential field from the downstream blade row are considered as the main ...
Analysis of Friction-Saturated Flutter Vibrations With a Fully Coupled Frequency Domain Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flutter stability is a dominant design constraint of modern turbines. Thus, flutter-tolerant designs are currently explored, where the resulting vibrations remain within acceptable bounds. In particular, friction damping ...
Validation of a Turbine Blade Component Test With Frictional Contacts by Phase-Locked-Loop and Force-Controlled Measurements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, a validation approach for a turbine blade component test with frictional contacts is presented. The investigated system is derived from a high cycle fatigue test setup, where a turbine blade is base-excited ...
How Intrusive Are Accelerometers for Measuring Nonlinear Vibrations? A Case Study on a Compressor Blade Subjected to Vibro-Impact Dynamics
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A characteristic feature of nonlinear vibrations is the energy transfer among different parts or modes of a mechanical system. Moreover, nonlinear vibrations are often non-periodic, even at steady state. To analyze these ...
Fully Coupled Analysis of Flutter Induced Limit Cycles: Frequency Versus Time Domain Methods
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To save resources and reduce emissions, it is crucial to reduce weight of aircraft engines and further increase aerodynamic efficiency of gas and steam turbines. For turbine blades, these goals often lead to flutter. Thus, ...
Absorption of Resonant Vibrations in Tuned Nonlinear Jointed Structures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel concept for the passive mitigation of forced, resonant vibrations is presented. The key to this concept is an absorption phenomenon which relies on the energy conversion from low to high frequencies by means of ...
Reduced Order Modeling Based on Complex Nonlinear Modal Analysis and Its Application to Bladed Disks With Shroud Contact
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The design of bladed disks with contact interfaces typically requires analyses of the resonant forced response and flutterinduced limit cycle oscillations. The steadystate vibration behavior can efficiently be calculated ...
On the Interaction of Multiple Traveling Wave Modes in the Flutter Vibrations of Friction-Damped Tuned Bladed Disks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It is well-known that flutter vibrations of bladed disks can be saturated by dry friction. Previous theoretical investigations indicated that the steady-state, friction-damped flutter vibrations of tuned bladed disks are ...