Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell
The maximizing of sound transmission loss (TL) across a functionally graded material (FGM) cylindrical shell has been conducted using a genetic algorithm (GA). To prevent the softening effect from occurring due to optimization, the objective function is modified based on the first resonant frequency...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2014/814682 |
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| _version_ | 1832554614040297472 |
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| author | Ali Nouri Sohrab Astaraki |
| author_facet | Ali Nouri Sohrab Astaraki |
| author_sort | Ali Nouri |
| collection | DOAJ |
| description | The maximizing of sound transmission loss (TL) across a functionally graded material (FGM) cylindrical shell has been conducted using a genetic algorithm (GA). To prevent the softening effect from occurring due to optimization, the objective function is modified based on the first resonant frequency. Optimization is performed over the frequency range 1000–4000 Hz, where the ear is the most sensitive. The weighting constants are chosen here to correspond to an A-weighting scale. Since the weight of the shell structure is an important concern in most applications, the weight of the optimized structure is constrained. Several traditional materials are used and the result shows that optimized shells with aluminum-nickel and aluminum-steel FGM are the most effective at maximizing TL at both stiffness and mass control region, while they have minimum weight. |
| format | Article |
| id | doaj-art-12ae75cf59254b90b719376a6d83330e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-12ae75cf59254b90b719376a6d83330e2025-02-03T05:50:53ZengWileyShock and Vibration1070-96221875-92032014-01-01201410.1155/2014/814682814682Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical ShellAli Nouri0Sohrab Astaraki1Department of Aerospace Engineering, Shahid Sattari Air University, Tehran 73411, IranDepartment of Aerospace Engineering, Shahid Sattari Air University, Tehran 73411, IranThe maximizing of sound transmission loss (TL) across a functionally graded material (FGM) cylindrical shell has been conducted using a genetic algorithm (GA). To prevent the softening effect from occurring due to optimization, the objective function is modified based on the first resonant frequency. Optimization is performed over the frequency range 1000–4000 Hz, where the ear is the most sensitive. The weighting constants are chosen here to correspond to an A-weighting scale. Since the weight of the shell structure is an important concern in most applications, the weight of the optimized structure is constrained. Several traditional materials are used and the result shows that optimized shells with aluminum-nickel and aluminum-steel FGM are the most effective at maximizing TL at both stiffness and mass control region, while they have minimum weight.http://dx.doi.org/10.1155/2014/814682 |
| spellingShingle | Ali Nouri Sohrab Astaraki Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell Shock and Vibration |
| title | Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell |
| title_full | Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell |
| title_fullStr | Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell |
| title_full_unstemmed | Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell |
| title_short | Optimization of Sound Transmission Loss through a Thin Functionally Graded Material Cylindrical Shell |
| title_sort | optimization of sound transmission loss through a thin functionally graded material cylindrical shell |
| url | http://dx.doi.org/10.1155/2014/814682 |
| work_keys_str_mv | AT alinouri optimizationofsoundtransmissionlossthroughathinfunctionallygradedmaterialcylindricalshell AT sohrabastaraki optimizationofsoundtransmissionlossthroughathinfunctionallygradedmaterialcylindricalshell |