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Keywords: damping
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Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2022, 144(5): 051011.
Paper No: VIB-22-1030
Published Online: May 13, 2022
...J. Gregory McDaniel; Alyssa Liem; Allison Kaminski Over the past century, a number of scalar metrics have been proposed to measure the damping of a complex system. The present work explores these metrics in the context of finite element models. Perhaps the most common is the system loss factor...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2022, 144(4): 041006.
Paper No: VIB-21-1268
Published Online: February 21, 2022
...K. P. McNamara; J. S. Love; M. J. Tait The nonlinear response of a series-type pendulum tuned mass damper-tuned liquid damper (TMD-TLD) system is investigated in this study. The TLD is mounted on the pendulum TMD in series to remove the need for costly viscous damping elements. Since the response...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2022, 144(4): 041002.
Paper No: VIB-21-1321
Published Online: January 13, 2022
... that this is due to a considerable increase of damping, caused by the sensor cables, affecting mainly the higher-frequency modes. While LDV and DIC are optical, i.e., non-contact measurement techniques, the accelerometer has to be physically connected to the point of interest. This is a fundamental difference...
Journal Articles
Article Type: Technical Briefs
J. Vib. Acoust. December 2021, 143(6): 064502.
Paper No: VIB-20-1429
Published Online: May 4, 2021
... for publication in the J ournal of V ibration and A coustics . 01 09 2020 13 04 2021 14 04 2021 04 05 2021 attenuation resonance accumulator flow rate venturi effect acoustic emission damping flow-induced noise and vibration noise control structural acoustics...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2021, 143(4): 041014.
Paper No: VIB-20-1483
Published Online: April 2, 2021
... system by a set of spring and damping elements. A complex coordinate notation was helpful to make a concise physical description of the in-phase and out-of-phase wobbling motions between the bodies. If its properties are properly adjusted, all modes interact (indicating veering or crossings between...
Journal Articles
Article Type: Design Innovation Paper
J. Vib. Acoust. October 2021, 143(5): 055001.
Paper No: VIB-20-1411
Published Online: January 22, 2021
... motion at 120 Hz under cutting head excitation. Note: The critical damping ratio is set at 5%. This is because vibration motion could be compared under the same displacement standard: ( a ) equal-span placement and ( b ) ST-DVA: 120 Hz. Vibration motion at 120 Hz under cutting head excitation. Note...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2021, 143(5): 051012.
Paper No: VIB-20-1432
Published Online: January 22, 2021
...Hangyuan Lv; Michael J. Leamy This paper explores the addition of small stubs with anechoic terminations (termed herein “anechoic stubs”) as a means of damping and/or removing vibration modes from planar frame structures. Due to the difficulties associated with representing anechoic boundary...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2021, 143(4): 041010.
Paper No: VIB-20-1305
Published Online: December 8, 2020
... identification process of two moving loads. The effects from moving loads’ traveling direction, measurement location arrangements, number of participant measurements, and damping ratios are considered in the studies under noisy disturbance conditions. Results show that the stiffness of the translational...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2021, 143(4): 041008.
Paper No: VIB-20-1124
Published Online: November 20, 2020
... by compression or friction between the particles or between particles and the container wall [ 13 – 18 ]. Studies on such particle assemblage dampers have reported damping characteristics using glass beads, steel balls, or elastomer particles, which have the structure of linear motion type, where rods coming out...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2021, 143(4): 041003.
Paper No: VIB-20-1038
Published Online: November 10, 2020
... the response characteristics of a linear oscillator for which the damping coefficient varies periodically in time. The Floquet theory is used to determine the effects of mean plus cyclic damping on the Floquet multipliers. An approximate Floquet solution, which includes an exponential part and a periodic part...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2021, 143(3): 031008.
Paper No: VIB-20-1294
Published Online: October 13, 2020
... that, by increasing the sublayer number, the present solution approaches the exact one. After validating the formulation and program, we investigate the acoustic vibration characteristics in nanoparticles. These include the effects of material anisotropy, damping, and core–shell imperfect interface on the vibration...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2021, 143(3): 031003.
Paper No: VIB-20-1312
Published Online: October 6, 2020
...Lukas Woiwode; Johann Gross; Malte Krack It is well-known that nonlinear dry friction damping has the potential to bound the otherwise unboundedly growing vibrations of self-excited structures. An important technical example are the flutter-induced friction-damped limit cycle oscillations...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2021, 143(2): 021001.
Paper No: VIB-20-1029
Published Online: September 1, 2020
... overlooked their damping effects through careful analytical model developments. The objective of the current work is to present analytical models for cable-harnessed structures that also include the damping effects in their vibration response. Obtaining simple, low-order and high-fidelity models are highly...
Topics: Cables, Damping
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2021, 143(1): 011008.
Paper No: VIB-19-1534
Published Online: August 14, 2020
...Wenshuo Ma; Jingjun Yu; Yiqing Yang The multi-degrees-of-freedom (MDOF) tuned mass damper (TMD) has proven its ability to suppress multiple modes of interest, and it possesses less mounting space than multiple single degree-of-freedom TMDs of equal damping mass. However, it is challenging...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2021, 143(1): 011011.
Paper No: VIB-20-1170
Published Online: August 14, 2020
... TLD equipped with damping screens. A linearized equivalent mechanical model capable of capturing the fundamental sloshing mode response of an annular TLD is presented. An experimental shake table testing program is completed to assess the performance of the model. Thirty-six frequency sweep tests...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2021, 143(1): 011001.
Paper No: VIB-20-1088
Published Online: July 22, 2020
... of the filling fraction on the bandgap absorption properties. The geometries studied here were printed in plastic due to the availability of 3D printers. damping materials in vibration and acoustics noise control 20 02 2020 25 06 2020 25 06 2020 22 07 2020 Contributed...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2020, 142(5): 051113.
Paper No: VIB-20-1073
Published Online: June 26, 2020
...Guebum Han; Utku Boz; Lejie Liu; Corinne R. Henak; Melih Eriten Articular cartilage is a thin layer of a solid matrix swollen by fluid, and it protects joints from damage via poroviscoelastic damping. Our previous experimental and simulation studies showed that cartilage-like poroviscoelastic...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. December 2020, 142(6): 061012.
Paper No: VIB-19-1206
Published Online: June 19, 2020
..., reported bandgaps are compared and an infinite unit cell model (band structure) is validated. The introduction of material loss factor (material damping) resulted in a broadband vibration attenuation zone spread throughout the frequency spectrum. Compared to a standard multiresonant pillared-plate model...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2020, 142(5): 051109.
Paper No: VIB-20-1156
Published Online: June 11, 2020
... proposes a model calibration technique that identifies the joint parameters of a four-parameter Iwan element based on the nonlinear natural frequencies and damping ratios computed with quasi-static modal analysis (QSMA). The QSMA algorithm is applied to the full-order finite element model (FEM) to obtain...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. October 2020, 142(5): 051107.
Paper No: VIB-19-1454
Published Online: May 22, 2020
... presents a method of simulating dynamic systems containing nonlinear Iwan elements that significantly reduce the computation cost by using closed-form expressions for stiffness and damping in the microslip regime and an averaging method for regions of time in which no external force is applied...