Response of Launch Pad Structures to Random Acoustic Excitation
The design of launch pad structures, particularly those having a large area-to-mass ratio, is governed by launch-induced acoustics, a relatively short transient with random pressure amplitudes having a non-Gaussian distribution. The factors influencing the acoustic excitation and resulting structura...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1994-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.3233/SAV-1994-1407 |
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| _version_ | 1849306184443494400 |
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| author | Ravi N. Margasahayam Raoul E. Caimi |
| author_facet | Ravi N. Margasahayam Raoul E. Caimi |
| author_sort | Ravi N. Margasahayam |
| collection | DOAJ |
| description | The design of launch pad structures, particularly those having a large area-to-mass ratio, is governed by launch-induced acoustics, a relatively short transient with random pressure amplitudes having a non-Gaussian distribution. The factors influencing the acoustic excitation and resulting structural responses are numerous and cannot be predicted precisely. Two solutions (probabilistic and deterministic) for the random vibration problem are presented in this article from the standpoint of their applicability to predict the response of ground structures exposed to rocket noise. Deficiencies of the probabilistic method, especially to predict response in the low-frequency range of launch transients (below 20 Hz), prompted the development of the deterministic analysis. The relationship between the two solutions is clarified for future implementation in a finite element method (FEM) code. |
| format | Article |
| id | doaj-art-38c88433381240faa6e8d867fda6fe2d |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 1994-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-38c88433381240faa6e8d867fda6fe2d2025-08-20T03:55:11ZengWileyShock and Vibration1070-96221875-92031994-01-011437538410.3233/SAV-1994-1407Response of Launch Pad Structures to Random Acoustic ExcitationRavi N. Margasahayam0Raoul E. Caimi1I-NET Space Services, I-NET Inc., Mail Stop INI-5, John F. Kennedy Space Center, FL 32899, USANASA Engineering Development, Mail Stop DM-MED-11, John F. Kennedy Space Center, FL 32899, USAThe design of launch pad structures, particularly those having a large area-to-mass ratio, is governed by launch-induced acoustics, a relatively short transient with random pressure amplitudes having a non-Gaussian distribution. The factors influencing the acoustic excitation and resulting structural responses are numerous and cannot be predicted precisely. Two solutions (probabilistic and deterministic) for the random vibration problem are presented in this article from the standpoint of their applicability to predict the response of ground structures exposed to rocket noise. Deficiencies of the probabilistic method, especially to predict response in the low-frequency range of launch transients (below 20 Hz), prompted the development of the deterministic analysis. The relationship between the two solutions is clarified for future implementation in a finite element method (FEM) code.http://dx.doi.org/10.3233/SAV-1994-1407 |
| spellingShingle | Ravi N. Margasahayam Raoul E. Caimi Response of Launch Pad Structures to Random Acoustic Excitation Shock and Vibration |
| title | Response of Launch Pad Structures to Random Acoustic Excitation |
| title_full | Response of Launch Pad Structures to Random Acoustic Excitation |
| title_fullStr | Response of Launch Pad Structures to Random Acoustic Excitation |
| title_full_unstemmed | Response of Launch Pad Structures to Random Acoustic Excitation |
| title_short | Response of Launch Pad Structures to Random Acoustic Excitation |
| title_sort | response of launch pad structures to random acoustic excitation |
| url | http://dx.doi.org/10.3233/SAV-1994-1407 |
| work_keys_str_mv | AT ravinmargasahayam responseoflaunchpadstructurestorandomacousticexcitation AT raoulecaimi responseoflaunchpadstructurestorandomacousticexcitation |