Journal of Vibration and Acoustics: Recent submissions

Now showing items 3121-3140 of 3913

    • Nonlinear Transverse Vibrations and Stability of Spinning Disks With Nonconstant Spinning Rate 

      T. H. Young (The American Society of Mechanical Engineers (ASME), 1992)
      This paper studies nonlinear transverse vibrations of spinning disks with nonconstant spinning rate. Here the angular speed of the disk is characterized as a small, periodic perturbation superimposed ...

    • Wet Modes of Submerged Structures—Part 1: Theory 

      M. M. Ettouney; F. L. DiMaggio; R. P. Daddazio (The American Society of Mechanical Engineers (ASME), 1992)
      A method for determining the acoustic radiation and scattering response induced by harmonic excitation of a submerged elastic structure is presented. It is based on expansion vectors, called wet ...

    • Dynamic Scaling of Flexible Structures With Viscoelastic Components 

      Thomas E. Alberts; Houchun Xia; Yung Chen (The American Society of Mechanical Engineers (ASME), 1992)
      Laboratory dynamic testing of large and complex space structures can be difficult and expensive, if practical at all. The use of dynamically scaled test articles is a standard approach to ...

    • Wet Modes of Submerged Structures—Part 2: Applications 

      R. P. Daddazio; M. M. Ettouney; N. Abboud (The American Society of Mechanical Engineers (ASME), 1992)
      Using the wet mode methodology described in Part I of this paper, we examine the harmonic response of an elastic shell in an infinite acoustic medium subjected to an incident pressure wave. ...

    • A Response Spectrum Method for Seismic Design Evaluation of Rotating Machines 

      M. P. Singh; L. E. Suarez; T. S. Chang (The American Society of Mechanical Engineers (ASME), 1992)
      The equations of motion of rotating machines subjected to seismic motions are quite complex, consisting of asymmetric general matrices with parametric and gyroscopic terms. Fortunately, the ...

    • Coupled Vibration of Cracked Shafts 

      C. A. Papadopoulos; A. D. Dimarogonas (The American Society of Mechanical Engineers (ASME), 1992)
      The coupling of vibration modes of vibration of a clamped-free circular cross-section Timoshenko beam with a transverse crack is investigated in this paper. A 6 × 6 local flexibility matrix ...

    • The Measurement of Nonlinear Damping in Single-Degree-of-Freedom Systems 

      H. J. Rice; J. A. Fitzpatrick (The American Society of Mechanical Engineers (ASME), 1991)
      The measurement and correct modelling of damping is of crucial importance in the prediction of the dynamical performance of systems for a wide range of engineering applications. In most cases, ...

    • Dynamic Stability Analysis of High Speed Axially Moving Bands With End Curvatures 

      K. W. Wang (The American Society of Mechanical Engineers (ASME), 1991)
      Measurements of vibration on continuous bands driven by rotating wheels show that the end curvature of the spans can greatly affect the system dynamic characteristics [1,2]. Significant error ...

    • Chaotic Response of a Slider Crank Mechanism 

      J. Peurach; B. H. Tongue (The American Society of Mechanical Engineers (ASME), 1991)
      A physical and corresponding theoretical model of a slider-crank mechanism is presented that approximates the single mode response of a continuous beam under a time periodic excitation in which ...

    • Detection of Cracks in Rotating Timoshenko Shafts Using Axial Impulses 

      K. R. Collins; J. Wauer; R. H. Plaut (The American Society of Mechanical Engineers (ASME), 1991)
      A rotating Timoshenko shaft with a single transverse crack is considered. The crack opens and closes during motion and is represented by generalized forces and moments. The shaft has simply ...

    • The Extended Modal Reduction Method Applied to Rotor Dynamic Problems 

      K. Kane; B. J. Torby (The American Society of Mechanical Engineers (ASME), 1991)
      In this paper, the existing Modal Reduction Method, which was developed to handle symmetric mass and stiffness matrices, is extended utilizing state-space formulation to handle nonsymmetric mass, ...

    • Unbalance Response of a Jeffcott Rotor Incorporating Long Squeeze Film Dampers 

      A. El-Shafei (The American Society of Mechanical Engineers (ASME), 1991)
      The steady state unbalance response of a Jeffcott rotor incorporating long squeeze film dampers executing circular centered precession is obtained. Fluid inertia forces are included in the model ...

    • Free Vibration Characteristics of Structures With Nonlinear Underlying Soil 

      Kamal A. F. Moustafa; M. El-Gebeily (The American Society of Mechanical Engineers (ASME), 1991)
      Free vibration of structures is investigated by using a multidegree of freedom nonlinear model that allows for nonlinear behavior of the soil underlying the structure. The considered nonlinearity ...

    • On the Stability Criteria for Conservative Gyroscopic Systems 

      K. Huseyin (The American Society of Mechanical Engineers (ASME), 1991)
      Two alternative but equivalent stability criteria for linear conservative gyroscopic systems are presented. The development of the criteria is based on the concept of symmetrizability associated ...

    • Piezoelectric Actuators for Distributed Vibration Excitation of Thin Plates 

      E. K. Dimitriadis; C. R. Fuller; C. A. Rogers (The American Society of Mechanical Engineers (ASME), 1991)
      The behavior of two dimensional patches of piezoelectric material bonded to the surface of elastic distributed structures and used as vibration actuators is analytically investigated. A static ...

    • Fluid-Structure Interaction Forces at Pump-Impeller-Shroud Surfaces for Axial Vibration Analysis 

      D. W. Childs (The American Society of Mechanical Engineers (ASME), 1991)
      Solutions are presented for the dynamic axial forces developed by pump-impeller-shroud surfaces. A bulk-flow model of the leakage path between the impeller and the housing is used for the ...

    • Vibration Absorbers for Hysterically Damped Mass-Loaded Beams 

      D. N. Manikanahally; M. J. Crocker (The American Society of Mechanical Engineers (ASME), 1991)
      A procedure for designing dynamic vibration absorbers for a general mass-loaded beam system of variable cross-sectional area, when it is subjected to an arbitrarily distributed simple harmonic ...

    • Active Sources in the Cutoff of Centrifugal Fans to Reduce the Blade Tones at Higher-Order Duct Mode Frequencies 

      W. Neise; G. H. Koopmann (The American Society of Mechanical Engineers (ASME), 1991)

    • Experimental Identification of Mechanical Joint Parameters 

      J. H. Wang; C. M. Liou (The American Society of Mechanical Engineers (ASME), 1991)
      The dynamic behavior of a mechanical system generally are strongly affected by the properties of mechanical joints. An identification method which directly used the measured frequency response ...

    • Rotordynamic Coefficients for Partially Roughened Pump Annular Seals 

      J. K. Scharrer; C. C. Nelson (The American Society of Mechanical Engineers (ASME), 1991)
      The basic equations are derived for incompressible flow in an annular seal with partially roughened surfaces. The flow is assumed to be completely turbulent in the axial and circumferential ...