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Modal Lamb Wave Amplitude

Posted 20.05.2025, 06:39 GMT-4 Acoustics & Vibrations, Structural Mechanics, Modeling Workflow 1 Reply

Marcel Kamrad
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Hey Guys, I would like to excite one single modal lamb wave mode (e.g. A3 mode) in a rectangular plate. Can you tell me how to do so? Freq. or time dependent, both is fine to me :)

1 Reply Last Post 22.05.2025, 17:20 GMT-4
David Greve
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Posted: 6 months ago 22.05.2025, 17:20 GMT-4

A0 and S0 modes are easily excited using appropriately arranged pairs of point forces. However at frequencies where higher order modes exist it is likely that point forces would excite a mixture of modes.

One possibility is to obtain the mode displacements through the thickness of the plate from theory or eigenmode simulations, and then use imposed displacements on the boundary. I haven't done this so I don't know how well it would work.

A0 and S0 modes are easily excited using appropriately arranged pairs of point forces. However at frequencies where higher order modes exist it is likely that point forces would excite a mixture of modes. One possibility is to obtain the mode displacements through the thickness of the plate from theory or eigenmode simulations, and then use imposed displacements on the boundary. I haven't done this so I don't know how well it would work.

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