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July 26, 2023
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July 26, 2023
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Abstract

The loss factor of a structure can be significantly improved through constrained damping treatment using viscoelastic layer. Even after introducing the constrained damping layer, the effective loss factor achieved is seen to be far less than the loss factor of the basic viscoelastic material. Methods to improve the loss factor of the aerospace structures further are of great practical importance. In this work, two methods are investigated, one is extending the damping treatment to the boundaries and the other is related to the use of stand-offs for the viscoelastic layers. It is shown through experiments and numerical simulation that significant increase in the loss factor can be achieved by extending the damping treatment into the interfaces, especially in the second bending mode of vibration. Stand-offs having good extensional modulus can improve the loss factor of the bending modes further, though its shear modulus does not play any significant role.

Keywords

Aerospace Structure, Constrained Damping, Loss Factor, Passive Control, Standoffs, Viscoelastic Material

Article Details

Author Biography

Kartik Venkatraman, Department of Aerospace Engineering Indian Institute of Science Bangalore-560 012



How to Cite
K. Joseph, T., Renji, K., & Venkatraman, K. (2023). On Improving the Loss Factors of Aerospace Structures Having Constrained Layer Damping Treatment. Journal of Aerospace Sciences and Technologies, 74(3), 182–194. https://doi.org/10.61653/joast.v74i3.2022.38
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