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RISA Statistical Characterization of the Effects and Interactions of Small and Large Mistuning on Multistage Bladed Disks
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As turbomachinery systems continue to push the limits of modern technology, the modeling techniques being developed also continue to push modern computational limits. While modeling the pristine system during the design ...
An Experimental and Computational Investigation of a Pulsed Air-Jet Excitation System on a Rotating Bladed Disk
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Nonsynchronous vibrations are a difficult problem to address for turbomachines due to the complex nature of the forcing. Such vibrations can be caused by vortex shedding, flow instabilities, stall cells, or flutter. Testing ...
Multistage Blisk and Large Mistuning Modeling Using Fourier Constraint Modes and PRIME
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Current efforts to model multistage turbomachinery systems rely on calculating independent constraint modes for each degree-of-freedom (DOF) on the boundary between stages. While this approach works, it is computationally ...
Parametric Study of a Unmanned Aerial Vehicle Ingestion Into a Business Jet Size Fan Assembly Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work investigated the damage severity of an unmanned aerial vehicle (UAV) ingestion into fan models of a midsized business jet engine. The ingestion of the quadcopter UAV model into the fan was carried out in ls-dyna. ...
Analyzing Bilinear Systems Using a New Hybrid Symbolic-Numeric Computational Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, an efficient and accurate computational method for determining responses of high-dimensional bilinear systems is developed. Predicting the dynamics of bilinear systems is computationally challenging since ...
Parametric Reduced Order Models for Bladed Disks With Mistuning and Varying Operational Speed
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A considerable amount of research has been conducted to develop reduced order models (ROMs) of bladed disks that can be constructed using single sector calculations when there is mistuning present. A variety of methods ...
Parametric Reduced Order Models for Bladed Disks With Mistuning and Varying Operational Speed
Publisher: American Society of Mechanical Engineers (ASME)
Abstract: A considerable amount of research has been conducted to develop reduced order models (ROMs) of bladed disks that can be constructed using single sector calculations when there is mistuning present. A variety of methods ...
Experimental Determination of Blade Tip Rub Forces in a Multiblade System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: As improved efficiency goals require ever smaller gaps between rotating turbomachinery blade tips and stationary outer casings, it becomes more important to understand the physics of what happens when a blade tip rubs ...
Efficient Hybrid Symbolic-Numeric Computational Method for Piecewise Linear Systems With Coulomb Friction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A wide range of mechanical systems have gaps, cracks, intermittent contact or other geometrical discontinuities while simultaneously experiencing Coulomb friction. A piecewise linear model with discontinuous force elements ...