Cross Coupled Support Stiffness

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Rotordynamics - Wikipedia

    https://en.wikipedia.org/wiki/Rotordynamics
    These terms are called cross-coupled stiffness, cross-coupled damping, and cross-coupled mass. When there is a positive cross-coupled stiffness, a deflection will cause a reaction force opposite the direction of deflection to react the load, and also a reaction force in the direction of positive whirl.

Aerodynamic Cross-coupling in a Flexible Rotor: Control ...

    https://pdfs.semanticscholar.org/f24d/f33fa94c19e73f9c5749a489867671f956c7.pdf
    Aerodynamic cross-coupled stiffness is one of the main contributors to rotordynamic instability in modern turbo-machines. The destabilizing effects of the cross-coupled stiffness are demonstrated. H2 and H¥ synthesis approaches are used to design controllers that may stabilize the rotor-bearing system over a wide range of cross-coupled ...

THE INFLUENCE OF SAME-SIGN CROSS-COUPLED STIFFNESS ON ...

    https://www.researchgate.net/publication/243711265_The_Influence_of_Same-Sign_Cross-Coupled_Stiffness_on_Rotordynamics
    Aerodynamic cross-coupled stiffness is one of the main contributors to rotordynamic instability in modern turbo-machines. ... This paper shows the influence of the method of modelling the support ...

Static Stiffness - an overview ScienceDirect Topics

    https://www.sciencedirect.com/topics/engineering/static-stiffness
    For each of the bearing support pedestals, the static stiffness values (k) ... Therefore, measurements of different non zero cross-coupled stiffness coefficient are probably due to a combination of three effects already mentioned, pivot friction being the most important factor.

Support Stiffness - an overview ScienceDirect Topics

    https://www.sciencedirect.com/topics/engineering/support-stiffness
    Consider a perfectly smooth wheel and rail where the support stiffness provided by the rail, K, varies with distance x.For relatively low frequency variations the wheel can be represented simply by a mass, M w, and a static load, F 0.Writing the response of the wheel as a quasi-static deflection of the track, u 0, and a dynamic component, u, this satisfies

Approximated Stiffness Coefficients in Rotor Systems ...

    https://www.hindawi.com/journals/ijrm/2010/540101/
    To receive news and publication updates for International Journal of Rotating Machinery, enter your email address in the box below. ... and decreases with the clearance while the absolute value of the cross coupling stiffness increases ... “Dynamic response and stability of a rotor-support system with non-symmetric bearing clearances ...Cited by: 4

Damping and stiffness, a primer Turbomachinery Magazine

    https://www.turbomachinerymag.com/rotordynamic-analysis/
    Oct 12, 2017 · Damping and stiffness, a primer By Drew Devitt ... have an external supply of pressurized fluid and so can support a load statically, that is without relative motion of the bearing faces. ... These losses are from the traction the rotor gets in the oil and responsible for …

TRC Software

    https://turbolab.tamu.edu/trc-software/
    XLPIMPLR produces (2×2) stiffness, damping, and mass matrices for centrifugal pump impellers. The code provides a library of pump impellers based on Sulzer-pump empirical data. XLWACHEL uses Wachel’s empirical formula to calculate destabilizing cross-coupled force coefficients for impellers of centrifugal compressors.

DIAGNOSTICS OF SUBSYNCHRONOUS VIBRATIONS IN …

    https://oaktrust.library.tamu.edu/bitstream/handle/1969.1/2596/etd-tamu-2005B-MEEN-Kar.pdf?sequence=1
    Diagnostics of Subsynchronous Vibrations in Rotating Machinery – Methodologies to Identify Potential Instability. (August 2005) Rahul Kar, B.E., National Institute of Technology, India Chair of Advisory Committee: Dr. John M.Vance Rotordynamic instability can be disastrous for the operation of high speed turbomachinery in the industry.

Changes of Shoulder, Elbow and Wrist Stiffness Matrix Post ...

    https://www.researchgate.net/publication/317133780_Changes_of_Shoulder_Elbow_and_Wrist_Stiffness_Matrix_Post_Stroke
    Changes of Shoulder, Elbow and Wrist Stiffness Matrix Post Stroke. ... cross-coupled stiffness in control group, ... CHANGES OF SHOULDER, ELBOW, AND WRIST STIFFNESS M ATRIX POST STROKE 7.



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