Amogh, R N and Mahanta, T K and B, Venkatesham
(2017)
Free vibration analysis of circular membrane backed by cylinder cavity using mode coupling approach.
In: ICOVP, 13th International Conference on Vibration Problems, 29th November-2nd December, IIT Guwahati.
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Abstract
Circular membrane backed by cylinder cavity configuration has come across in various acoustic
applications such as musical instruments, sensors and loudspeaker design. The Vibration Characteristics of
membrane are influenced by the presence of acoustic cavity, and this interaction is named as structural-
acoustic coupling. The coupled natural frequencies of the membrane are predicted using Mode Coupling
approach. In this approach, the coupled system behaviour is expressed in terms of the finite number of
uncoupled sub-system modes. Acoustic impedances of cavity and structural mobility of membrane are
arranged in a matrix form. The matrix representation helps to do efficient computations. It also helps to find
modes participation in coupling. The predicted results are corroborated with numerical results
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