• Shock and Vibration - Hindawi Publishing Corporation

    The asymmetric rotor and the rub-impact behavior are important sources of instability and may cause severe vibrations. However, the dynamics of the rotor-bearing system simultaneously considering the two factors has not gained sufficient attention in available investigations. In this paper, the steady-state response and stability of an asymmetric rotor with rub-impact were evaluated.

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  • Dynamic Analysis and Design of a Novel Ring-Based ...

    future vibration-based energy harvesters. Zhou and Zuo [17] demonstrated that nonlinear dynamic analysis of asymmetric tri-stable energy harvesters could be used for enhanced energy harvester for various conditions. It is worth noting that most of the studies described above employed beam and tube structures to design harvesting systems.

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  • Transformer sound level caused by core magnetostriction ...

    Mar 15, 2017· Magnetostriction caused by the exciting variation of the magnetic core and the current conducted by the winding wired to the core has a significant result impact on a power transformer. This paper presents the sound of a factory transformer before on-site delivery for no-load tests. This paper also discusses the winding characteristics from the transformer full-load tests.

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  • Vibration analysis of functionally graded graphene ...

    (2019). Vibration analysis of functionally graded graphene platelet reinforced cylindrical shells with different porosity distributions. Mechanics of Advanced .

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  • Chest electrical impedance tomography examination, data ...

    Asymmetrical distribution of ventilation measured by EIT can assist the clinician in diagnosing unilateral lung disease such as pneumothorax, atelectasis and malpositioning of the endotracheal tube.94–96 In the short term, the use for these purposes may be the easiest method of broadly integrating EIT into the clinical environment. The ...

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  • Lateral dynamic bridge deck–pier interaction for ultra ...

    Aug 19, 2020· Therefore, exploring the lateral dynamic interaction of bridge deck (twin tube) and piers under such an unbalanced moment is an extremely important factor for the analysis of viaducts under dynamic UHS train loading. Hence, this paper analytically addresses the dynamic bridge deck–pier interaction under UHS train loading for lateral vibration.

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  • Modeling, analysis and validation of a novel asymmetric ...

    Jan 06, 2020· d 31 mode piezoelectric property has been widely used in vibration-based energy harvester, however there are very few studies on fully utilizing maximum piezoelectric constant d 15.In this study, a novel asymmetric cruciform harvester with d 15 mode is proposed. The asymmetric cruciform beam is composed of one main beam and two asymmetric side beams.

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  • A Structure Design Method for Reduction of MRI Acoustic Noise

    The acoustic problem of the split gradient coil is one challenge in a Magnetic Resonance Imaging and Linear Accelerator (MRI-LINAC) system. In this paper, we aimed to develop a scheme to reduce the acoustic noise of the split gradient coil. First, a split gradient assembly with an asymmetric configuration was designed to avoid vibration in same resonant modes for the two assembly cylinders.

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  • US10322827B2 - High frequency gravitational wave generator ...

    A high frequency gravitational wave generator including a gas filled shell with an outer shell surface, microwave emitters, sound generators, and acoustic vibration resonant gas-filled cavities. The outer shell surface is electrically charged and vibrated by the microwave emitters to generate a first electromagnetic field. The acoustic vibration resonant gas-filled cavities each have a cavity ...

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  • Effect of mechanical disruption on the effectiveness of ...

    For the analysis, 0.05 to 0.2 g of each cellulose sample was dispersed in water in a 15-mL centrifuge tube. Thereafter, individual dispersed samples were vortex mixed and transferred to the Hydro 2000G module that contained 0.8 to 1.0 L of deionized water, with a stirrer setting of 600 rpm and a pump setting of 1,250 rpm.

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  • Numerical simulation and experimental research of the flow ...

    In the pilot stage of nozzle-flapper servo valve, the flow force on the flapper is the key reason that leads to forced vibration of the armature assembly, which may result in the fatigue of the flexure tube in torque motor. To master the principles and features of the flow force and the source of the forced vibration of the armature assembly, mathematical models of flow force and the forced ...

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  • ISMA - Past Editions

    Li, S., Mace, B. R., and Dhupia, J. S., 'Vibration analysis of a structure with an attachment at an uncertain location using parametric model order reduction with krylov subspaces', The University of Auckland. ( abstract, full paper ) 11:00

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  • Direct Biofluid Analysis Using Hydrophobic Paper Spray ...

    Ambient electrostatic paper spray ionization from a hydrophobic paper occurs when a DC potential is applied to the dry paper triangle. Online liquid/liquid extraction of small organic compounds from a drop of biological fluid present on the dry hydrophobic paper is achieved with an organic spray solvent in under 1 min and utilizes in situ electrostatic-spray ionization for more efficient ...

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  • Advances in Vibration Analysis Research | IntechOpen

    Apr 04, 2011· 18. Analysis of Microparts Dynamics Fed Along on an Asymmetric Fabricated Surface with Horizontal and Symmetric Vibrations. By Atsushi Mitani and Shinichi Hirai. 1092: Open access peer-reviewed. 19. Vibration Analysis of a Moving Probe with Long Cable for Defect Detection of Helical Tubes. By Takumi Inoue and Atsuo Sueoka. 1299: Open access ...

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  • Transformer sound level caused by core magnetostriction ...

    Mar 15, 2017· Magnetostriction caused by the exciting variation of the magnetic core and the current conducted by the winding wired to the core has a significant result impact on a power transformer. This paper presents the sound of a factory transformer before on-site delivery for no-load tests. This paper also discusses the winding characteristics from the transformer full-load tests.

    Get price
  • Machine-Condition Monitoring using Vibration

    Alma's paper machine no. 14 pro- production business for many years - machine's many bearings, and a large duces some 370 tonnes of paper per the Alma mill produced its first roll of part of the mill's maintenance is in-day. At a market price for newsprint paper in 1925, and the age of some of volved with the changing of damaged

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  • Why Did the World Trade Center Collapse?—Simple Analysis

    Abstract: This paper 3 presents a simplified approximate analysis of the overall collapse of the towers of World Trade Center in New York on September 11, 2001. The analysis shows that if prolonged heating caused the majority of columns of a single floor to lose their .

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  • Large-Amplitude Periodic Oscillations in Suspension ...

    This paper surveys an area of nonlinear functional analysis and its applications. The main application is to the existence and multiplicity of periodic solutions of a possible mathematical models of nonlinearly supported bending beams, and their possible application to nonlinear behavior as observed in large-amplitude flexings in suspension bridges.

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  • International Journal of Applied Mechanics | Vol 10, No 09

    In this paper, the vibration suppression mechanism of a nonlinear fluid pipe via nonlinear energy sink (NES) is studied for the first time. The fluid pipe is simply supported under harmonic foundation excitation. The complexification-averaging method combined with the arc-length continuation method is used to predict the response of the system.

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  • Single Beam

    Symmetric stretch Asymmetric stretch Bend Bend Figure 1. Normal Modes for a linear triatomic molecule. In the last bending vibration the motion of the atoms is in-and-out of the plane of the paper. In general linear molecules have 3N-5 normal modes, where N is the number of atoms. The

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  • Study of Phase-Transition Characteristics of New Composite ...

    A new composite phase change material of capric acid–palmitic acid/expanded graphite (CA–PA/EG) with the optimum mass ratio of EG equated to 8:1 was prepared by the physical adsorption method. It was observed that the eutectic point of CA–PA binary system was reached at 22.1 °C, and CA–PA was uniformly distributed into the pores of EG by physical interaction. The melting and freezing ...

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  • Why Did the World Trade Center Collapse?—Simple Analysis

    Abstract: This paper 3 presents a simplified approximate analysis of the overall collapse of the towers of World Trade Center in New York on September 11, 2001. The analysis shows that if prolonged heating caused the majority of columns of a single floor to lose their .

    Get price
  • The Fibre Composite Helicopter Blade | The Aeronautical ...

    The theory is an extension of Batho-Bredt engineering analysis and is valid for a cylindrical tube of arbitrary cross-section with an arbitrary circumferential distribution of fibre composite plies. Particular attention is paid to the coupling effects in which an asymmetric fibre lay-up results in a twisting of the tube under bending and/or ...

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  • Free vibration of asymmetric shear wall‐frame buildings ...

    In this paper, the Galerkin technique is used for the free vibration analysis of a completely asymmetric building on a rigid and flexible foundation with non-uniform properties along its height. ... The inner and outer tubes represent the wall and the frame systems ( V ) framed building -a FREE VIBRATION OF ASYMMETRIC SHEAR WALL-FRAME BUILDINGS ...

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  • Analysis of S Characteristics and Pressure Pulsations in a ...

    Mar 29, 2013· Analysis of Pressure Fluctuations in the Draft Tube. The following discussion focuses on monitoring point 3 to analyze the impact of the pressure fluctuations. The pressure pulse waveforms and spectra for the aligned guide vane and MGV cases are shown in Fig. Fig.12, 12, with the detailed amplitudes and the main frequencies listed in Table ...

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  • Piezoelectric Simulations

    A Piezoceramic Tube This model performs a static 2D axisymmetric analysis of a piezoelectric actuator. A radially polarized piezoelectric tube is simulated, with two sets of boundary conditions. The first case illustrates the inverse piezoelectric effect, and the second case shows the direct piezoelectric effect. The model is based on a paper ...

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  • Measuring Vibration with Accelerometers - NI

    Jul 15, 2020· Vibration can be expressed in metric units (m/s 2) or units of gravitational constant "g," where 1 g = 9.81 m/s 2. An object can vibrate in two ways: free vibration and forced vibration. Free vibration occurs when an object or structure is displaced or .

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  • Transformer sound level caused by core magnetostriction ...

    Mar 15, 2017· Magnetostriction caused by the exciting variation of the magnetic core and the current conducted by the winding wired to the core has a significant result impact on a power transformer. This paper presents the sound of a factory transformer before on-site delivery for no-load tests. This paper also discusses the winding characteristics from the transformer full-load tests.

    Get price
  • Study of Phase-Transition Characteristics of New Composite ...

    A new composite phase change material of capric acid–palmitic acid/expanded graphite (CA–PA/EG) with the optimum mass ratio of EG equated to 8:1 was prepared by the physical adsorption method. It was observed that the eutectic point of CA–PA binary system was reached at 22.1 °C, and CA–PA was uniformly distributed into the pores of EG by physical interaction. The melting and freezing ...

    Get price
  • Numerical simulation and experimental research of the flow ...

    In the pilot stage of nozzle-flapper servo valve, the flow force on the flapper is the key reason that leads to forced vibration of the armature assembly, which may result in the fatigue of the flexure tube in torque motor. To master the principles and features of the flow force and the source of the forced vibration of the armature assembly, mathematical models of flow force and the forced ...

    Get price
  • Modeling of Streamwise and Transverse Fluidelastic ...

    The analysis does not constrain either tube frequency or relative mode shape so that the tubes' behavior evolves from a perturbation naturally. No additional empirical input is required. A particular case is used to evaluate the model's performance and the ratio of streamwise-to-transverse natural frequency is .

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  • Symptom Checker - Mayo Clinic - Mayo Clinic

    Walls RM, et al., eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 9th ed. Philadelphia, Pa.: Elsevier; 2018. https:// Accessed ...

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Founded in 1982, Dekelon Paper Making Machinery Co.,Ltd. has always striven to meet and exceed customer expectations and continue to update and improve...

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