Noise and vibration damping of Fe-Cr-x alloys

Pulino-Sagradi, D.; Martin, Jean‐Luc

doi:10.1590/s0100-73862001000200001

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…Certain hard-coated damping layers do not show the typical three-point feature of change in loss factor as assumed in the first case. For such materials, the material damping stabilizes to a particular value beyond a certain specified strain [16]. The closed-form analysis for hybrid and passive only damping is carried out similarly for such cases.…”

Section: Resultsmentioning

confidence: 99%

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Closed-form studies of a new hybrid damping technique using an active layer and hard-coated damping alloys

Ahlawat¹,

Vidyashankar²,

Bhattacharya³

2007

Smart Mater. Struct.

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Hybrid damping of structural vibration using a combination of active and passive layers is found to have high application potential due to the requirement of a lower power supply and guaranteed stability. Use of hard-coating layers as a passive damping treatment is found to be industrially acceptable for turbine blades etc, due to the high damping capacity and large service temperature range. However, such damping materials also have high strain dependence. In a way that is similar to active constrained layer damping, by using an active material the strain in the passive damping can be controlled, and thereby the damping performance of the passive layer. This paper proposes a semi-analytical method to estimate structural damping in such a system and obtain the response of a smart hybridly damped system. The paper delves into the closed-form solution of all common boundary conditions of a vibrating beam, namely cantilever, hinged-hinged, free-free, hinged-free, and fixed-fixed beams. It also compares the damping performance of a beam with only a passive damping layer to that of beams comprising both active and passive damping layers.

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Section: Resultsmentioning

confidence: 99%

“…. (16) The potential energy terms have been formulated for different length segments. These are used to obtain the modal loss factor as a function of time (since the loss factor of the hard-coated damping layer varies with time).…”

Section: Calculation Of the Modal Loss Factormentioning

confidence: 99%

Closed-form studies of a new hybrid damping technique using an active layer and hard-coated damping alloys

Ahlawat¹,

Vidyashankar²,

Bhattacharya³

2007

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…It follows from the graph that the damping capacity is maximum at annealing temperature of around 1000 • C, which can be called the critical temperature. Several researchers have reported that the damping capacity of ferromagnetic alloys increases due to annealing treatment [9,10]. Hence it follows that the annealing treatment can significantly improve the vibration capacity of the alloy.…”

Section: Damping Capacitymentioning

confidence: 99%