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Journal articles on the topic 'Damping treatment'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

Shen, I. Y. "Hybrid Damping Through Intelligent Constrained Layer Treatments." Journal of Vibration and Acoustics 116, no. 3 (1994): 341–49. http://dx.doi.org/10.1115/1.2930434.

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This paper is to propose a viable hybrid damping design that integrates active and passive dampings through intelligent constrained layer (ICL) treatments. This design consists of a viscoelastic shear layer sandwiched between a piezoelectric constraining cover sheet and the structure to be damped. According to measured vibration response of the structure, a feedback controller regulates axial deformation of the piezoelectric layer to perform active vibration control. In the meantime, the viscoelastic shear layer provides additional passive damping. The active damping component of this design w

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2

Khamas, Ihsan Jabar, and Hameed D. Lafta. "Effect of Heat Treatments and Carbon Content on the Damping Properties of Structural Steel." Journal of Engineering 29, no. 7 (2023): 106–19. http://dx.doi.org/10.31026/j.eng.2023.07.07.

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Low- and medium-carbon structural steel components face random vibration and dynamic loads (like earthquakes) in many applications. Thus a modification to improve their mechanical properties, essentially damping properties, is required. The present study focuses on improving and developing these properties, significantly dampening properties, without losing the other mechanical properties. The specimens used in the present study are structural steel ribbed bar ISO 6935 subjected to heating temperatures of (850, 950, and 1050) ˚C, and cooling schemes of annealing, normalizing, sand, and quenchi

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3

Yi, Sung, M. Fouad Ahmad, and H. H. Hilton. "Dynamic Responses of Plates With Viscoelastic Free Layer Damping Treatment." Journal of Vibration and Acoustics 118, no. 3 (1996): 362–67. http://dx.doi.org/10.1115/1.2888191.

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Dynamic transient responses of plates with viscoelastic free damping layers are studied in order to evaluate free layer damping treatment performances. The effects of forcing frequencies and temperatures on free-layer viscoelastic damping treatment of plates are investigated analytically. Young’s modulus ratio of structures to viscoelastic damping materials and the damping layer thickness effects on the damping ability are also explored.

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4

Yellin, Jessica M., I. Y. Shen, Per G. Reinhall, and Peter Y. H. Huang. "An Analytical and Experimental Analysis for a One-Dimensional Passive Stand-Off Layer Damping Treatment." Journal of Vibration and Acoustics 122, no. 4 (2000): 440–47. http://dx.doi.org/10.1115/1.1287789.

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Passive stand-off layer (PSOL) damping treatments are presently being implemented in many commercial and defense designs. In a passive stand-off layer damping treatment, a stand-off or spacer layer is added to a conventional passive constrained layer (PCL) damping treatment. An analytical model which quantifies the bending and shearing contributions of the stand-off layer has been developed for a passive stand-off layer damping treatment applied to a beam. The equations of motion were derived and solved in order to simulate the frequency responses of several beams treated with passive stand-of

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5

Ferrali, Leonardo, and Davide Caprioli. "GOLD for Lightweight Damping Treatment." ATZautotechnology 3, no. 5 (2003): 52–55. http://dx.doi.org/10.1007/bf03246790.

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6

Ryaboy, Vyacheslav. "Damping treatment of optical breadboards." Journal of the Acoustical Society of America 141, no. 5 (2017): 3645. http://dx.doi.org/10.1121/1.4987875.

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7

Liu, Y., and K. W. Wang. "Enhanced Active Constrained Layer Damping Treatment for Broadband Vibration Suppression." Journal of Vibration and Control 8, no. 6 (2002): 777–803. http://dx.doi.org/10.1177/1077546029202.

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In this paper, the Enhanced Active Constrained Layer (EACL) treatment is investigated for broadband damping augmentations on beam structures. The EACL concept was originally proposed to improve the damping performance of the Active Constrained Layer (ACL) by introducing edge elements at the treatment boundaries. It has been recognized that the edge elements can increase ACL performance by enhancing the direct active authority of the piezoelectric constraining layer. It has also been demonstrated that the edge element stiffness and the host structure strain field have significant influence on t

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8

Baz, A., and S. Poh. "Performance Characteristics of the Magnetic Constrained Layer Damping." Shock and Vibration 7, no. 2 (2000): 81–90. http://dx.doi.org/10.1155/2000/658593.

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A new class of surface damping treatment is proposed to provide effective means for attenuating undesirable structural vibrations. The proposed treatment relies in its operation on the use of smart damping treatments which consist of integrated arrays of constrained visco-elastic damping layers that are controlled passively by a specially arranged network of permanent magnets. The interaction between the magnets and the visco-elastic layers aims at enhancing the energy dissipation characteristics of the damping treatments. In this manner, it would be possible to manufacture structures that are

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9

Fu, Xu, Ning Li, Yu Hua Wen, Jing Teng, and Ying Zhang. "Effect of Aging Treatment on Damping Capacity in Mncunife Alloy." Applied Mechanics and Materials 246-247 (December 2012): 1158–62. http://dx.doi.org/10.4028/www.scientific.net/amm.246-247.1158.

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M2052 alloys with various aging treatments are obtained in order to investigate the relationship between aging treatment and damping capacity by the torsion pendulum, X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) methods. The results show that M2052 can obtain high damping capacity (δ>0.2) when aged at a range from 400°C to 450°C, and the damping capacity after aged at a lower temperature is higher than that aged at a higher temperature for the maximum values. TEM and XRD results show that fcc-fct transformation occurs after aging treatment. The volumes of fct structure

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10

Trindade, Marcelo A., and Ayech Benjeddou. "Hybrid Active-Passive Damping Treatments Using Viscoelastic and Piezoelectric Materials: Review and Assessment." Journal of Vibration and Control 8, no. 6 (2002): 699–745. http://dx.doi.org/10.1177/1077546029186.

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Hybrid active-passive damping treatments combine the reliability, low cost and robustness of viscoelastic damping treatments and the high performance, modal selective and adaptive piezoelectric active control. Numerous hybrid damping treatments have been reported in the literature. They differ mainly by the relative positions of viscoelastic treatments, sensors and piezoelectric actuators. Therefore, the present article provides a review of the open literature concerning geometric configurations, modeling approaches and control algorithms for hybrid active (piezoelectric)-passive (viscoelastic

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11

Teng, Xiaoyan, Yuedong Han, Xudong Jiang, Xiangyang Chen, and Meng Zhou. "Energy Flow Analysis Model of High-Frequency Vibration Response for Plates with Free Layer Damping Treatment." Mathematics 11, no. 6 (2023): 1379. http://dx.doi.org/10.3390/math11061379.

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The energy flow analysis (EFA) model is developed for predicting the vibrational response of plates with free layer damping (FLD) treatment under high-frequency excitation. For the plate with fully free layer damping (FFLD) treatment, the energy density equation of the laminated plate with high damping is deduced by combining the equivalent complex stiffness method with the EFA theory. For the plate with partially free layer damping (PFLD) treatment, the relationship between energy density and energy intensity is obtained based on the wave theory of coupled plate by analyzing the energy transf

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12

Ro, J., and A. Baz. "Optimum Placement and Control of Active Constrained Layer Damping using Modal Strain Energy Approach." Journal of Vibration and Control 8, no. 6 (2002): 861–76. http://dx.doi.org/10.1177/107754602029204.

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The Active Constrained Layer Damping (ACLD) treatment has been used successfully for controlling the vibration of various flexible structures. It provides an effective means for augmenting the simplicity and reliability of passive damping with the low weight and high efficiency of active controls to attain high damping characteristics over broad frequency bands. In this paper, optimal placement strategies of ACLD patches are devised using the modal strain energy (MSE) method. These strategies aim at minimizing the total weight of the damping treatments while satisfying constraints imposed on t

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13

Guo, Zhiwei, Meiping Sheng, and Hao Zeng. "Vibration Attenuation in a Beam Structure with a Periodic Free-Layer Damping Treatment." Machines 11, no. 10 (2023): 949. http://dx.doi.org/10.3390/machines11100949.

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In order to improve the vibration reduction performance of damping treatments, a new damping structure consisting of a uniform base layer and two periodically alternating free layers was examined in this study. Closed-form solutions for both the band structure and the forced response of the periodic bi-layer beam were theoretically derived and verified via numerical solutions using the finite-element method. The results showed that the structure with periodic free-layer damping (PFLD) treatment reduced broadband vibrations, and the levels of reduction were dominated by Bragg scattering in the

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14

Qi, Jia Rui, Jing Tao Dai, Yan Li Li, and Dan Feng Zhang. "Research on Free Damping Treatment for a Marine Life Hoist of the Helicopter." Advanced Materials Research 518-523 (May 2012): 3859–64. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.3859.

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Free damping treatment for a marine life hoist of the helicopter is analyzed in this paper. Based on the pipe structure used in actual life hoist bracket, the complex rigidity method is used to analyze the damping loss factor of the pipe structure. When the temperature is 30°C and the thickness of the damping material is 2.5mm, the damping loss factor of the structure increases by 9.83 times. The damping ratio of the first mode reaches 11.61%. The results indicate that the free damping treatment can obviously increase the damping loss factor and the modal damping ratio of the structure, which

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15

Teng, Xiaoyan, Nan Liu, and Xudong Jiang. "Analytical model of high-frequency energy flow response for a beam with free layer damping." Advances in Mechanical Engineering 12, no. 12 (2020): 168781402098459. http://dx.doi.org/10.1177/1687814020984596.

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Energy flow analysis (EFA) is developed to predict the vibrational energy density of beam structures with both full free layer damping (FFLD) and partial free layer damping (PFLD) treatments in the high frequency range. Both equivalent flexural stiffness and structural damping loss factor of a beam with free layer damping are obtained using the equivalent complex stiffness method. Then the energy density governing equation considering high damping effect is derived for a beam with FFLD treatment. Following obtainment of the energy transfer coefficients at both ends of free damping layer, the e

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16

Liu, Yujun, Jing Liu, Guang Pan, Liming Guo, and Qiaogao Huang. "A Design Method for Vibration and Acoustic Reduction of the Power System in an Underwater Automobile Glider." International Journal of Acoustics and Vibration 27, no. 3 (2022): 233–44. http://dx.doi.org/10.20855/ijav.2022.27.31865.

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Underwater automobile gliders (AUGs) are new underwater vehicles, that should have lightweight structures with low vibration and acoustic characteristics due to their working conditions. This paper proposes a design method for vibration and acoustic reduction of the power system in an AUG by using the stand-off layer perforated viscoelastic material (SOL-PVEM) damping treatment with lightweight characteristics. The finite element method is used to calculate the vibration characteristics and modal loss factors of the plates with different SOL-PVEM damping treatments. The influence of the perfor

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17

Gröhlich, Martin, Andrej Lang, Marc Böswald, and Jens Meier. "Viscoelastic damping design – Thermal impact on a constrained layer damping treatment." Materials & Design 207 (September 2021): 109885. http://dx.doi.org/10.1016/j.matdes.2021.109885.

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18

Ramesh, T. C., and N. Ganesan. "Vibration and damping analysis of conical shells with constrained damping treatment." Finite Elements in Analysis and Design 13, no. 1 (1993): 17–29. http://dx.doi.org/10.1016/0168-874x(93)90003-9.

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19

Wang, Lin, Tai Hong Cheng, Xu Dong Tang, and Jin Gui Qian. "Vibration and Damping Analysis of Carbon Fiber Wind Turbine Blade with Viscoelastic Damping Treatment." Advanced Materials Research 1008-1009 (August 2014): 192–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.192.

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The paper have described the vibration and damping analysis of carbon fiber wind turbine blade with viscoelastic damping treatment using commercial ANSYS program. The wind turbine system including a carbon fiber layer and a viscoelastic damping layer was attached on inside of carbon layer. Firstly, the natural frequencies and mode shape of pure carbon fiber turbine blade were compared with viscoelastic damping treated turbine blade using modal analysis. There were 1mm, 2mm, 3mm thickness damping layer finite element model to be constructed. The results show the little changes in lower first mo

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20

Jun, Joong Hwan, Ki Duk Seong, Jeong Min Kim, Ki Tae Kim, and Woon Jae Jung. "Influence of Microstructural Change on Damping Capacity of Mg-X%Li Alloys." Materials Science Forum 539-543 (March 2007): 1764–68. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1764.

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The Effects of Li content and annealing treatment on microstructure and damping capacity for Mg-X%Li alloys have been investigated, based on experimental results from X-ray diffractometry (XRD), optical microscopy (OM), hardness tests and vibration damping tests in a flexural mode. The Mg-X%Li alloys containing Li of 3%, 8% and 13% consist of α (HCP) single phase, (α + β (BCC)) dual phases and β single phase, respectively. In as-rolled state, the damping capacity for Mg-Li alloys shows a similar level regardless of Li content. The annealing treatments at 200oC and 400οC give rise to an enhance

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21

Kwak, Juho, Chang Yong Kang, Han Sang Kwon, and Kwon Hoo Kim. "Effect of Prior Strain on Damping Capacity and Mechanical Property during Heat Treatment." Materials Science Forum 879 (November 2016): 1053–56. http://dx.doi.org/10.4028/www.scientific.net/msf.879.1053.

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In previous study, it was investigated damping capacity on various deformation and heat treatment conditions in order to study damping capacity that was influenced by grain size and dislocation motion in detail. Magnesium alloy AZ31 was rolled at 673K with different rolling reduction, respectively. Specimens were machined out parallel to the rolled direction and annealed on various temperature and time. Then, damping capacity, microstructure and hardness was measured at room temperature. Factors affected on damping capacity are grain size, crystal orientation, dislocation motion, and so on. It

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22

Fang, Mei Ling, Jie Zhu, Ji Heng Li, Chao Gan, Ming Ming Li, and Xue Xu Gao. "Influence of Heat Treatment on the Damping Capacity of Fe-Ga Wires." Advanced Materials Research 629 (December 2012): 165–70. http://dx.doi.org/10.4028/www.scientific.net/amr.629.165.

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The influence of heat treatment on damping capacity of (Fe83Ga17)99.5B0.5 wires was investigated using a computer-controlled automatic inverted torsion pendulum. The measurements have been carried out as a function of strain amplitude in free-decay mode. The microstructures of (Fe83Ga17)99.5B0.5 wires were also investigated to clarify the effects of heat treatment on the damping capacity. The results show that the annealing temperature affects the damping capacity of (Fe83Ga17)99.5B0.5 wires by varying the grain size. With increasing annealing temperature, the damping capacity is enhanced and

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23

Ling, Zheng, Xie Ronglu, Wang Yi, and Adel El-Sabbagh. "Topology Optimization of Constrained Layer Damping on Plates Using Method of Moving Asymptote (MMA) Approach." Shock and Vibration 18, no. 1-2 (2011): 221–44. http://dx.doi.org/10.1155/2011/830793.

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Damping treatments have been extensively used as a powerful means to damp out structural resonant vibrations. Usually, damping materials are fully covered on the surface of plates. The drawbacks of this conventional treatment are also obvious due to an added mass and excess material consumption. Therefore, it is not always economical and effective from an optimization design view. In this paper, a topology optimization approach is presented to maximize the modal damping ratio of the plate with constrained layer damping treatment. The governing equation of motion of the plate is derived on the

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24

Cummings, Jaime A., Carol A. Miles, and Lindsey J. du Toit. "Greenhouse Evaluation of Seed and Drench Treatments for Organic Management of Soilborne Pathogens of Spinach." Plant Disease 93, no. 12 (2009): 1281–92. http://dx.doi.org/10.1094/pdis-93-12-1281.

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The efficacy of 14 seed and drench treatments for control of soilborne damping-off pathogens in organic production of spinach was evaluated in a greenhouse study. The efficacy of each treatment was compared with nontreated seed and seed treated with a conventional fungicide for control of Fusarium oxysporum f. sp. spinaciae, Pythium ultimum, and Rhizoctonia solani. Two experimental seed treatments, GTG I and GTG II (each comprised of a proprietary organic disinfectant and the latter also containing Trichoderma harzianum T22), provided equivalent control to the conventional fungicide, mefenoxam

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25

Cheng, Tai-Hong, Zhen-Zhe Li, and Yun-De Shen. "Vibration Analysis of Cylindrical Sandwich Aluminum Shell with Viscoelastic Damping Treatment." Advances in Materials Science and Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/130438.

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This paper has applied the constrained viscoelastic layer damping treatments to a cylindrical aluminum shell using layerwise displacement theory. The transverse shear, the normal strains, and the curved geometry are exactly taken into account in the present layerwise shell model, which can depict the zig-zag in-plane and out-of-plane displacements. The damped natural frequencies, modal loss factors, and frequency response functions of cylindrical viscoelastic aluminum shells are compared with those of the base thick aluminum panel without a viscoelastic layer. The thickness and damping ratio o

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26

Zhou, Xiao Dong, and Chang Wu Xiong. "Study on Vibration and Damping of Printed Circuit Boards Treated with Partial Constrained Damping Layer." Advanced Materials Research 1049-1050 (October 2014): 590–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.590.

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Constrained damping layer (CDL) treatment has been an effective way to suppress vibration level of various structures. by introducing this method into the vibration control system of electronic equipments, this paper firstly discussed the dominant mechanism difference between free damping layer treatment and constrained damping layer treatment, Then base on the constrained layer damping layout optimization method in the vibration system of a rectangle thin board like PCB, a series of experimental investigations were presented on the vibration response of printed circuit boards treated with par

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27

Baz, A., and J. Ro. "Optimum Design and Control of Active Constrained Layer Damping." Journal of Mechanical Design 117, B (1995): 135–44. http://dx.doi.org/10.1115/1.2836447.

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Conventional Passive Constrained Layer Damping (PCLD) treatments with viscoelastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. The design parameters and control gains of the resulting Active Constrained Layer Damping (ACLD) treatments are optimally selected, in this paper, for fully-treated beams using rational design procedures. The optimal thickness and shear modulus of the passive visco-elastic core are determined first to maximize the modal damping ratios and minimize the total weight of the da

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28

Baz, A., and J. Ro. "Optimum Design and Control of Active Constrained Layer Damping." Journal of Vibration and Acoustics 117, B (1995): 135–44. http://dx.doi.org/10.1115/1.2838655.

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Conventional Passive Constrained Layer Damping (PCLD) treatments with viscoelastic cores are provided with built-in sensing and actuation capabilities to actively control and enhance their vibration damping characteristics. The design parameters and control gains of the resulting Active Constrained Layer Damping (ACLD) treatments are optimally selected, in this paper, for fully-treated beams using rational design procedures. The optimal thickness and shear modulus of the passive visco-elastic core are determined first to maximize the modal damping ratios and minimize the total weight of the da

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29

Oh, J., S. Poh, M. Ruzzene, and A. Baz. "Vibration Control of Beams Using Electro-Magnetic Compressional Damping Treatment." Journal of Vibration and Acoustics 122, no. 3 (2000): 235–43. http://dx.doi.org/10.1115/1.1303004.

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A new class of structural damping treatments is introduced. This class is the electro-magnetic damping treatment (EMDT) which relies in its operation on a viscoelastic damping layer sandwiched between two magnetic layers. Interaction between the magnets generates magnetic forces that enhance the compressional damping mechanism of the viscoelastic layer. With proper tuning of the magnetic forces, in response to the structural vibration, undesirable resonances and catastrophic failures can be avoided. The fundamentals and the underlying phenomena associated with the EMDT are investigated theoret

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30

Chen, Rong, Haitao Luo, Hongguang Wang, and Weijia Zhou. "Topology optimization of partial constrained layer damping treatment on plate for maximizing modal loss factors." Composites and Advanced Materials 30 (January 1, 2021): 263498332110348. http://dx.doi.org/10.1177/26349833211034879.

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Constrained layer damping treatment is widely used to suppress the vibration and noise of thin-walled structures. However, full coverage of constrained damping layer will increase unnecessary additional mass, resulting in material waste and cannot effectively improve the damping performance of the composite structure. In this article, a topology optimization approach is proposed to realize the optimal distribution of constrained damping layer. The design objective is to maximize modal loss factors solved by the modal strain energy method under the constraint of volume. Taking the relative dens

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31

Zhao, H. T., Junchen Yao, Yue Ma, and Hui Bin Xu. "Damping Behavior of the High Strength Aluminum Alloy Prepared by Rapid Solidification and Powder Metallurgy Process." Materials Science Forum 475-479 (January 2005): 2599–602. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.2599.

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The effect of aging treatment on the damping capacity of the high strength damping aluminum alloy prepared by RS/PM process was investigated. The damping properties of the alloy were examined with dynamic mechanic thermal analyzer (DMTA). The damping capacity, as well as the dynamic Young’s modulus was measured at different temperatures and different loading frequencies. The analysis of microstructure characteristics was performed using transmission electron microscopy (TEM) and X-ray diffraction (XRD). It was found that the damping capacity of the alloy did not change significantly after agin

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32

MOREIRA, R. A. S., and J. DIAS RODRIGUES. "PARTIAL CONSTRAINED VISCOELASTIC DAMPING TREATMENT OF STRUCTURES: A MODAL STRAIN ENERGY APPROACH." International Journal of Structural Stability and Dynamics 06, no. 03 (2006): 397–411. http://dx.doi.org/10.1142/s0219455406002003.

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The constrained viscoelastic layer damping treatment is an effective means for the passive vibration control of plate and beam-kind structures. In order to reduce the treatment cost, while minimizing structural modifications, particularly the increase in mass, constrained viscoelastic treatments can be successfully applied in a partial and localized manner. The effectiveness of these treatments depends on their extension and relative location with respect to the target mode shape, which is not usually expeditiously established. In order to minimize the cost of the numerical optimization of the

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33

Gao, Pei-xin, Jing-yu Zhai, Fu-zheng Qu, and Qing-kai Han. "Vibration and damping analysis of aerospace pipeline conveying fluid with constrained layer damping treatment." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 8 (2017): 1529–41. http://dx.doi.org/10.1177/0954410017692367.

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The constrained layer damping materials are thoroughly used to control the vibration duo to their high capacity to dissipate vibration energy. Researchers have handled the vibration and damping behavior of the constrained layer damping structures accurately. However, for the constrained layer damping pipeline conveying fluid, there are few works on the investigation of the vibration characteristics. This paper is aimed to investigate the vibration and damping characteristics of the constrained layer damping pipeline conveying fluid under elastic boundary supports. Considering the fluid–structu

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34

Li, Ming, and Hui Ming Zheng. "Damping Characteristics of a Cantilever Plate Using Permanent Magnetic Constrained Layer Damping Strip Treatment." Advanced Materials Research 450-451 (January 2012): 466–71. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.466.

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Significant improvement of damping characteristics can be achieved by using the new class of magnetic constrained layer damping treatment (MCLD). This paper presents the damping properties of the first and second torsional mode for a five-layer cantilever rectangular plate treated with partial MCLD. The Rayleigh-Ritz method and Hamilton’s principle are employed in the analysis. We have chosen both single and segmented patches with different sizes. It can be observed that for the two modes single-patched MCLD treatment induces less improvement of damping characteristics especially for the short

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35

Gao, J. X., and W. H. Liao. "Damping Characteristics of Beams with Enhanced Self-Sensing Active Constrained Layer Treatments Under Various Boundary Conditions." Journal of Vibration and Acoustics 127, no. 2 (2004): 173–87. http://dx.doi.org/10.1115/1.1891816.

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In this paper, an energy-based approach is developed to investigate damping characteristics of beams with enhanced self-sensing active constrained layer (ESACL) damping treatments. Analytical formulations for the active, passive, and total hybrid modal loss factors of the cantilever and simply-supported beams partially covered with the ESACL are derived. The analytical formulations are validated with the results in the literature and experimental data for the cantilever beam. Beams with other boundary conditions can also be solved and discussed using the presented approach. The results show th

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36

El-Morsy, Abdel-Wahab, and Ahmed I. Z. Farahat. "Effect of Aging Treatment on the Damping Capacity and Mechanical Properties of Mg-6Al-1Zn Alloy." Scientific World Journal 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/170458.

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The damping capacity and mechanical properties of Mg-6Al-1Zn alloy after heat treatment were investigated. The damping characteristics of un-heat-treated, solution treated, and aged Mg-6Al-1Zn specimens were determined by measuring the damping ratio and the logarithmic decrement of free vibrations of a bending beam clamped at one side. The microstructural evaluations confirmed that theβ-Mg17Al12phase was reprecipitated after aging and increased with an increase in aging time. The peak level of damping ratio and logarithmic decrement was obtained after 34 hr of aging time, over which the dampin

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37

Hujare, Pravin P., and Anil D. Sahasrabudhe. "Experimental Investigation of Damping Performance of Viscoelastic Material Using Constrained Layer Damping Treatment." Procedia Materials Science 5 (2014): 726–33. http://dx.doi.org/10.1016/j.mspro.2014.07.321.

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38

Roy, P. K., and N. Ganesan. "A vibration and damping analysis of circular plates with constrained damping layer treatment." Computers & Structures 49, no. 2 (1993): 269–74. http://dx.doi.org/10.1016/0045-7949(93)90107-o.

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39

Dong, Xiaoyang, Jinxing Wang, Zichuan Wang, et al. "Effects of Solution Treatment on Damping Capacities of Binary Mg-X (X = Ga and Er) Alloys." Materials 15, no. 22 (2022): 8172. http://dx.doi.org/10.3390/ma15228172.

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Designing new materials for vibration and noise reduction that are lightweight is of great significance for industrial development. Magnesium (Mg) alloy is considered one of the best damping metal structural materials because of its low density, high specific strength, good energy storage characteristics and rich resources. Solution atoms have an important effect on the damping capacities of Mg alloys, but the relevant laws have not been completely clarified. In this work, two kinds of alloying elements (Ga and Er) with various atomic sizes were selected to study the metallographic structure a

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40

Wang, Yue, Yiming Fang, Liang Li, Dingguo Zhang, Wei-Hsin Liao, and Jianshi Fang. "Dynamic Modeling and Vibration Suppression of a Rotating Flexible Beam with Segmented Active Constrained Layer Damping Treatment." Aerospace 10, no. 12 (2023): 1010. http://dx.doi.org/10.3390/aerospace10121010.

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This paper uses high-order approximate coupling (HOAC) dynamics equations for the hub–beam system with segmented active constrained layer damping treatment (SACLD). To improve the damping characteristics of traditional active constrained layer damping (ACLD), the viscoelastic damping layer, and the piezoelectric constraining layer are cut at the same position. The damping characteristics of the structure are enhanced by increasing the shear strain of the viscoelastic damping layer. The finite element method is used to discretize the SACLD beam. The discontinuity of the SACLD beam element-to-el

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Zhao, Caiyou, and Ping Wang. "Theoretical Modelling and Effectiveness Study of Slotted Stand-Off Layer Damping Treatment for Rail Vibration and Noise Control." Shock and Vibration 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/716382.

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A promising means of reducing railway noise is to increase the damping of the rail, which decreases the vibration of the rail to reduce noise. To achieve this goal, a slotted stand-off layer damping treatment has been developed, and a compound track model with this treatment is developed for investigating the effectiveness of this treatment in terms of the vibration reduction. Through the dynamic analysis of the track undergoing the slotted stand-off layer damping treatment, some guidelines are proposed on the selection of materials and structure parameters for this treatment. In addition, the

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Alberts, T. E., and Houchun Xia. "Design and Analysis of Fiber Enhanced Viscoelastic Damping Polymers." Journal of Vibration and Acoustics 117, no. 4 (1995): 398–404. http://dx.doi.org/10.1115/1.2874470.

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A new composite damping material is investigated, which consists of a viscoelastic matrix and high elastic modulus fiber inclusions. This fiber enhanced viscoelastic damping polymer is intended to be applied to lightweight flexible structures as a surface treatment for passive vibration control A desirable packing geometry for the composite material is proposed, which is expected to produce maximum shear strain in the viscoelastic damping matrix. Subsequently, a micromechanical model is established in which the effect of fiber segment length and relative motion between neighboring fibers are t

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Joseph, Thomas K., K. Renji, and Kartik Venkatraman. "On the Region for the Application of Passive Damping Treatment and Loss Factor Enhancement." International Journal of Acoustics and Vibration 24, no. 4 (2019): 693–700. http://dx.doi.org/10.20855/ijav.2019.24.41432.

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The loss factor of a structure is significantly improved by using constrained damping treatment. For a mass efficient design, the damping material is to be applied at suitable locations. The studies reported in literature use the modal strain energy distribution in the viscoelastic material or the strain energy distribution in the base structure as tools to arrive at these suitable locations for the damping treatment. It is shown here that the regions identified through the above criteria need not be suitable for certain bending modes of vibration. A new approach is proposed in which the strai

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Sun Yong, Kim. "RDVM Topology Optimization for Optimal Damping Treatment." Transactions of the Korean Society for Noise and Vibration Engineering 27, no. 1 (2017): 72–79. http://dx.doi.org/10.5050/ksnve.2017.27.1.072.

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OHTA, Kazuhide, Koki YAMASHITA, Rei ENOKIZONO, and Masashi SHUDO. "Evaluation of damping treatment for engine structure." Proceedings of Mechanical Engineering Congress, Japan 2016 (2016): G1000103. http://dx.doi.org/10.1299/jsmemecj.2016.g1000103.

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Zheng, Huiming, Ming Li, and Zeng He. "Active and passive magnetic constrained damping treatment." International Journal of Solids and Structures 40, no. 24 (2003): 6767–79. http://dx.doi.org/10.1016/j.ijsolstr.2003.08.011.

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Moreira, R., and J. D. Rodrigues. "Constrained Damping Layer Treatments: Finite Element Modeling." Journal of Vibration and Control 10, no. 4 (2004): 575–95. http://dx.doi.org/10.1177/1077546304039060.

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In this paper we assess the performance of finite element models in modeling structures with sheer damping treatments. We analyze the finite element modeling of constrained layer damping (CLD) and integrated layer damping (ILD) treatments using viscoelastic materials, devoting special attention to the spatial modeling of the treatment and to the characterization of the viscoelastic material properties. In this work, we used a finite element commercial software (MSC.Nastran) to simulate the dynamic response of aluminum plates with both treatment configurations (CLD and ILD). The spatial modelin

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Mielczarek, Agnieszka, Werner Riehemann, Olga A. Sokolova, and Igor S. Golovin. "Influence of Heat Treatment on Magnetic and Damping Properties of Fe-11 at.% Al Alloys." Solid State Phenomena 137 (March 2008): 129–36. http://dx.doi.org/10.4028/www.scientific.net/ssp.137.129.

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The influence of heat treatment on the amplitude dependence of internal friction in Fe - 11 at. % Al alloys with carbon contents in the range 0.005 - 0.2 at. % has been studied using an inverted torsion pendulum in the temperature range 300 – 950 K and a vibrating reed apparatus at room temperature. The specimens were annealed at 1273 K in vacuum and cooled down with different cooling rates in order to obtain different degrees of order. It was found that ordering is hardly avoidable in Fe - Al alloys with Al contents > 11 at. %. Ordered alloys are characterised by lower damping capacity due

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Zhang, Jun, Ziming Kou, Yaqin Yang, et al. "Optimisation of Heat Treatment Process for Damping Properties of Mg-13Gd-4Y-2Zn-0.5Zr Magnesium Alloy Using Box–Behnken Design Method." Metals 9, no. 2 (2019): 157. http://dx.doi.org/10.3390/met9020157.

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High damping magnesium alloys have poor mechanical properties, so it is necessary to investigate the damping properties of high-strength wrought magnesium alloys to effectively reduce vibration and noise in mechanical engineering. The aim of this work is to improve the mechanical damping performance of a novel high-strength Mg-13Gd-4Y-2Zn-0.5Zr magnesium alloy by optimising the heat treatment process. The mechanical damping coefficient, considering not only damping capacity but also the yield strength, is selected as one of the evaluation indexes. The other evaluation index is the tensile stre

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Haghdoust, Pouya, Antonietta Lo Conte, Simone Cinquemani, and Nora Lecis. "Experimental and Numerical Characterization of High Damping Martensitic CuAlMn Sheets." Materials 13, no. 3 (2020): 529. http://dx.doi.org/10.3390/ma13030529.

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This paper deals with the experimental and numerical characterization of a high damping CuAlMn sheet with a martensitic micro-structure at ambient temperature. A Cu-Al-Mn shape memory alloy containing 11.65 wt.% of Al and 3 wt.% of Mn, was cast and hot rolled to the thickness of 0.4–0.3 mm. Transformation temperatures, micro-structure and mechanical properties were studied. Effects of the heat treatment on damping were investigated, identifying the proper heat treatment to obtain a higher damping. Having to model the amplitude dependent damping of the material investigated, a material model wa

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