Vibroacoustics/Statistical Energy Analysis

Like Robert Frost, I have miles to go before I sleep, and all because I took the road less traveled…

This is a long-term work-in-progress…

I am including SEA in my Matlab GUI package.

The functions can be accessed via:

vibrationdata > Miscellaneous Functions I > Acoustics & Vibroacoustics

I am using textbooks by Lyon, DeJong, Wijker, Norton & Karczub, along with AutoSEA and VAPEPS manuals.

I am compiling SEA parameter equations scattered among various references into a single document.  He is my result so far: SEA_parameters.pdf & Alternate Link

Please feel free to recommend additions or corrections.

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Launch vehicle example: SEA_cylindrical_shell_shelf.pdf

Payload fairing example:  SEA_payload_fairing_acoustics.pdf

SCLV Slides

SEA_Slides, Part II

A Comparison of Vibroacoustic Coupling in Launch Vehicles between Diffuse Acoustic Field and Turbulent Boundary Layer Excitation:  SEA_DAF_TBL_power.pdf

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See also:

Honeycomb Sandwich Panels

Notes on the Barrett Scaling Method

Acoustic Power Spectra

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NASA References:

Compendium of Modal Densities for Structures, NASA-CR-1773

Techniques for Predicting Localized Vibratory Environments of Rocket Vehicles, Barrett, R. E.,  NASA TN D-1836

Statistical Techniques for Predicting Localized Vibratory Environments of Rocket Vehicles, Barrett, R. E.,  NASA TN D-2158

Using the Saturn V and Titan III. Vibroacoustic Databanks for Random. Vibration Criteria Development, R.C. Ferebee, Marshall Space Flight Center, Alabama  NASA-TM-2009-215902  and  Saturn V and Titan Databanks

Vibration Level Variation by Axis from Saturn V Flight Data:  Saturn_V_axis.pdf

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Other References:

Cremer, Heckl, Ungar, Structure-Borne Sound: Structural Vibrations and Sound Radiation at Audio Frequencies

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Tom Irvine
Email: tom@irvinemail.org