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Saturday, May 16, 2020 | History

3 edition of Ultrasonic resonance spectroscopy of composite rings for flywheel rotors found in the catalog.

Ultrasonic resonance spectroscopy of composite rings for flywheel rotors

Ultrasonic resonance spectroscopy of composite rings for flywheel rotors

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Published by National Aeronautics and Space Administration, Glenn Research Center, Available from NASA Center for AeroSpace Information in Cleveland, Ohio, Hanover MD .
Written in English

    Subjects:
  • Ultrasonic spectroscopy.,
  • Resonant frequencies.,
  • Composite materials.,
  • Flywheels.,
  • Ring structures.

  • Edition Notes

    StatementLaura M. Harmon, George Y. Baaklini.
    SeriesNASA/TM -- 2001-210960., NASA technical memorandum -- 210960.
    ContributionsBaaklini, George Y., NASA Glenn Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17719354M

    Adam H. Willitsford, C. Todd Chadwick, Stewart Kurtz, C. Russell Philbrick and Hans Hallen, "Resonance-Enhanced Raman Scattering of Ring-Involved Vibrational Modes in the1B2uAbsorption Band of Benzene, In-cluding the Kekule Vibrational Modes N9and N10," Journal of Physical Chemistry A , - , An Introduction to Helicopter Air Resonance By A. R. S. BRAMWELL The City University, London Reports and Memoranda No. * September, Summary The phenomenon known as 'air resonance', peculiar to helicopters with hingeless rotors, has been analysed and presented in as simple a manner as Size: 1MB.

    Figure 3: Rotational spectrum of the rigid rotator.[1] Vibration - The harmonic oscillator The electronic potential W(R 12) introduced in eq. (1) and shown schematically in g. 1 is usually approximated by a harmonic (i.e. parabolic) potential having a minimum at the equilibrium distance. Valcon E A polyaryletherketone/PTFE composite, the E material receives wide GC use in what had previously been a problematic gap between the optimum temperature ranges of P and T, and in HPLC applications where the temperature requirement is higher than what can be handled by the H material and where a lower pressure limit can be tolerated.

    Sound hib. () 6 (3), THE VIBRATION OF MECHANICAL RESONATORS (II) RINGS, DISCS, AND RODS OF ARBITRARY PROFILE G. M. L. GLADWELLt Institute of Sound and Vibration Research, The University, Highfield, Southampton, S09 5NH, England (Received 9 May ) A general computation method, based on the finite element method, is presented and applied to the Cited by: 8.   What is claimed is: 1. A fixed-angle centrifuge rotor having a rotor axis that is a vertical axis of rotation and comprising: a rotor core having laminated layers of fiber-reinforced composite material with the layers arranged normal to the rotor axis and bound together with resin, the rotor core including at least one cell hole having a top tilted toward the rotor axis at an oblique angle and.


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Ultrasonic resonance spectroscopy of composite rings for flywheel rotors Download PDF EPUB FB2

Ultrasonic Resonance Spectroscopy of Composite Rings for Flywheel Rotors Laura M. Harmon Cleveland State University, Cleveland, Ohio George Y. Baaklini Glenn Research Center, Cleveland, Ohio Prepared for the Sixth Annual International Symposium on NDE for Health Monitoring and Diagnostics sponsored by The International Society for Optical Cited by: 2.

Get this from a library. Ultrasonic resonance spectroscopy of composite rings for flywheel rotors. [Laura M Harmon; George Y Baaklini; NASA Glenn Research Center.].

Ultrasonic spectroscopy of composite rims for flywheel rotors were investigated with a recently developed ultrasonic resonance spectroscopy technique. (PMC) rings sectioned from flywheel. Ultrasonic Resonance Spectroscopy of Composite Rims for Flywheel Rotors Laura M.

Harmon Cleveland State University Cleveland, OH George Y. Baaklini National Aeronautics and Space Administration Glenn Research Center Cleveland, OH Summary Flywheel energy storage devices comprising multilayered composite rotor systems are being File Size: 1MB.

Ultrasonic Spectroscopy based on wavelets transform for materials characterization. “Ultrasonic spectroscopy of composite rings for space station. flywheel rotors” Materials Evaluation. CONFERENCE PROCEEDINGS Papers Presentations Journals. Advanced Photonics Journal of Applied Remote Sensing.

Optimization of a guided wave scanning system on a composite material Laura Cosgriff, Richard Martin, Donald Roth Proc. SPIE.Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III. In the hybrid composite flywheel rotors, the basic concept is to place softer and heavier materials in the inner side of the rotor and stiffer and lighter materials in the outer side of the the study, the hybrid composite flywheel rotor is composed of three layers of materials, the outer layer is made of high-strength composite T/, the middle layer is relatively softer Cited by: 8.

Resonance Acoustic Spectroscopy deals with the analysis of waves generated in an elastic body by a plane harmonic acoustic wave. It is the first monograph to treat new analytical and experimental methods for the investigation of the excitation, propagation and re-radiation of elastic waves in solid, thick-walled and thin-walled elastic material is presented systematically.

Chapter 4, Rotor Resonance and Corrections Section 1, Resonant Whirl. Resonant whirl is the condition whereby a rotor is resonating at a frequency equal to its own running speed (1 x rpm). Rotors can resonate to frequencies other than those equal to their operating speeds. A complete method of designing high-performance composite flywheel rotors is presented in this paper.

One rotor design consists of multiple concentric rings of filament-wound, epoxy-matrix composites either press fitted or separated by compliant elastomeric by: Buy Resonance Acoustic Spectroscopy (Springer Series on Wave Phenomena) on FREE SHIPPING on qualified ordersCited by: developing a closed-form structural model of advanced polymer matrix composite (PMC) flywheels.

The model is of the linear-viscoelastic type, and is applicable to the design and analysis of multiple concentric-ring PMC flywheel rotors in a state of plane-stress.

This model incorporates techniques for approximating the quasi-static response to Author: Ryan Paul Emerson. This video shows introduction of rotational spectroscopy and moment of inertia of linear molecules, spherical rotors and symmetric rotors and asymmetric top molecules.

The article presents the results of a computing experiment carried out with the use of a previously described calculation model of a rotor for determining the effect of the characteristics of an element of the elastodissipative connection of the blades on their resonance vibrations in the case of flanged shrouding rings with a view to the asymmetry of the rotor due to the mistuning of the Author: A.

Zin'kovskii, I. Buslenko, V. Matveev. speed slewing without stalling the motors. I can slew at deg/second, resonance freq's are up high, near the speeds you want to slew at and the motor stalls.

Adding a flywheel (or adding friction, or adding viscous damping) can lower the motor's resonant frequency, and improve high speed performance. Some materials are generally better resonators than others based on their elastic properties.

Wood has better elastic properties than, say, polystyrene. In the case of musical instrument materials such as wood, the trick is not in finding one th.

Resonance Acoustic Spectroscopy deals with the analysis of waves generated in an elastic body by a plane harmonic acoustic wave. It is the first monograph to treat new analytical and experimental methods for the investigation of the excitation, propagation and re-radiation of elastic waves in solid, thick-walled and thin-walled elastic material is presented systematically Author: Naum D.

Veksler. Open Library is an open, editable library catalog, building towards a web page for every book ever published. Resonance acoustic spectroscopy by Naum Davidovich Veksler,Springer-Verlag edition, in English.

Scientific American is the essential guide to the most awe-inspiring advances in science and technology, explaining how they change our understanding of the world and shape our lives. Ring Of Resonance: A ring that resonates with the Ring of Flame Lord: together, they form a matching set.

Adds a chance of doing one of the following when physically attacked: 2% chance of using [Venom Splasher] Lv 10 on the target. 2% chance of using [Tarot Card of Fate] Lv 5 on the target.Fig. -mixing magnetic resonance spectroscopy of the YIG microdisk.

(A) The spectrum is acquired while sweeping the field from high to low, with H 1 = 78 A/m and H 2 = A/m, as in Fig. 2. The field and fre-quency step sizes are A/m and MHz, arrow represents the direc-tion of the field sweep.

(B) Enlargement of.filament winding composite rings flywheel has one weakness of very low strength on the radial direction because that the fibers are placed parallel to each other in the hoop direction but no reinforcement in the radial direction.

To overcome this weakness, the multi-rings flywheel and stacked-ply flywheel techniques were considered [9, 10].