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Keywords: frequency response
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Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2020, 142(4): 041013.
Paper No: VIB-19-1300
Published Online: April 13, 2020
... experimentally. Besides, a finite element method (FEM) model considering the acoustic-vibration coupling and material parameters dependent on temperature is presented applying software ansys - workbench to calculate stress and strain frequency responses of the blades, and the results agree well...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2020, 142(2): 021009.
Paper No: VIB-19-1376
Published Online: January 23, 2020
..., stiffness ratio, and external force amplitude on the frequency response amplitude and force transmissibility are discussed. Finally, the frequency responses of four designed nonlinear HSLDS isolators and a linear isolator are acquired by the numerical method. The results show that the nonlinear isolator...
Journal Articles
Article Type: Research-Article
J. Vib. Acoust. June 2015, 137(3): 031015.
Paper No: VIB-13-1421
Published Online: June 1, 2015
... at the damaged element, described by Eq. (4) , were sufficiently different to observe the changes between the frequency response functions of the undamaged and damaged spectra. Newmark's method (with Newmark parameters of γ  = 1/2 and β  = 1/6) was selected for the integration algorithm to determine...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2012, 134(2): 021003.
Published Online: January 13, 2012
.... 4 is used to generate Monte Carlo simulation samples from which uncertain frequency response functions (FRFs) at the observation point are obtained. The relevant information and parameter values associated with these simulations are also supplied in Table 1 . To randomize the boundary conditions...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2012, 134(1): 011010.
Published Online: December 28, 2011
... (isolation) frequencies. The theoretical frequency response is compared with experimental testing results. Figure 2 shows a schematic diagram of a fluidic composite tunable isolator. A mass M is attached to one end of a fluid-filled F 2 MC tube. The mass is excited...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2012, 134(1): 011001.
Published Online: December 22, 2011
... extensibility, rotary inertia, and shear deformation. The assessment is carried out by comparing the dynamic behavior predicted by each curved beam model in terms of the dispersion relations, frequency spectra, cutoff frequencies, natural frequencies and mode shapes, and frequency responses. In order to ensure...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2011, 133(6): 061003.
Published Online: September 9, 2011
... a thickness achievable with conventional tools. Then, to increase its damping effectiveness, the thin edge is extended for some length with constant thickness. Finally, damping material is added on the extended part. Experimental and finite element method (FEM) frequency response analyses were carried out...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2011, 133(5): 051004.
Published Online: July 26, 2011
... detection through vibration testing: open crack model and breathing crack model. The present study is based on breathing crack model, in which the nonlinear vibration response under harmonic excitation is formulated through Volterra series and higher order frequency response functions. Bilinear stiffness...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2011, 133(5): 051006.
Published Online: July 26, 2011
... of the parameters, such as fiber orientation, lay-up sequence, number of layers, and the layer thickness on the uncertain responses due to dynamic impulse load, is thoroughly analyzed. Significant changes are observed in the high frequency responses with the variation in the above parameters, even for a small...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2011, 133(4): 041012.
Published Online: April 11, 2011
... of the effect of boundary conditions on the laminated steel specimen. The new setup is developed in combination with a frequency response function based optimization method, to automatically derive the dynamic properties of viscoelastic core materials and generate their master curves. A solver based...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2011, 133(3): 031009.
Published Online: March 29, 2011
...Michael J. Martin; Brian H. Houston The frequency response of a cylinder in a viscously damped fluid is a problem of fundamental engineering interest, with applications ranging from microsystems to offshore structures. The analytic solution for the drag in a vibrating cylinder in the laminar flow...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2010, 132(6): 061007.
Published Online: October 8, 2010
... rectangular plate. A simple stability-performance formula has been derived, which, using the open loop sensor-actuator frequency response function, gives the maximum control performance that can be produced by such a feedback loop at resonance frequencies of the lower order modes of the plate. The parametric...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2010, 132(5): 051009.
Published Online: August 26, 2010
...Timothy W. Dimond; Amir A. Younan; Paul Allaire There is a significant disagreement in the literature concerning the proper evaluation of the experimental identification and frequency response of tilting-pad journal bearings (TPJBs) due to shaft excitations. Two linear models for the frequency...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2010, 132(5): 051004.
Published Online: August 19, 2010
... are studied numerically, using the frequency-response function and the phase-plane methods. It is also shown that the system parameters have different effects on the nonlinear response of the thin plate. Moreover, the chaotic motion of the thin plate is found by numerical simulation. 11 04 2009 25...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2010, 132(4): 041004.
Published Online: May 20, 2010
...Qinkai Han; Jianjun Wang; Qihan Li The frequency response characteristic of a general time-invariant system has been extensively analyzed in literature. However, it has not gained sufficient attentions in the parametrically excited system. In fact, due to the parametric excitation, the frequency...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2010, 132(1): 011010.
Published Online: January 13, 2010
... continuum into account rather than an ordinary continuum. The frequency response function of the presented model has been validated experimentally and is shown to be in good agreement with the experimental results for a planar truss with Pratt girder configuration. Tarazaga , P. A. , Inman , D...
Journal Articles
Article Type: Technical Briefs
J. Vib. Acoust. February 2010, 132(1): 014501.
Published Online: January 13, 2010
...Z. K. Peng; Z. Q. Lang; X. J. Jing; S. A. Billings; G. R. Tomlinson; L. Z. Guo In the present study, the concept of the output frequency response function, recently proposed by the authors, is applied to theoretically investigate the force transmissibility of single degree of freedom (SDOF) passive...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2009, 131(5): 051007.
Published Online: September 11, 2009
...Z. K. Peng; Z. Q. Lang; S. A. Billings The analysis of multidegree-of-freedom (MDOF) nonlinear systems is studied using the concept of nonlinear output frequency response functions (NOFRFs), which are a series of one-dimensional functions of frequency recently proposed by the authors to facilitate...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2009, 131(2): 021011.
Published Online: February 19, 2009
... and frequency response curves of the system. The influences of the damping, tip mass, amplitude of magnetic field strength, permeability, and conductivity of the beam material on the frequency response curves are investigated. These perturbation results are found to be in good agreement with those obtained...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2009, 131(1): 011012.
Published Online: January 8, 2009
... directional frequency response functions (r-dFRFs) and the degree and location of asymmetry. A map of the modal constants of the r-dFRFs for all elements is constructed to identify the location of crack by comparing the identified modal constants to those of the reference map. This paper also addresses...