Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition
The geometric parameters of the acoustic black hole (ABH) structure are changed in power exponent, and this feature can be used to control the flexural wave to achieve energy concentration, vibration attenuation, or noise reduction. However, in practice, the ABH structure often has a truncation due...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/6708138 |
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| _version_ | 1832555867057160192 |
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| author | Xiaofei Du Dacheng Huang Jianrun Zhang |
| author_facet | Xiaofei Du Dacheng Huang Jianrun Zhang |
| author_sort | Xiaofei Du |
| collection | DOAJ |
| description | The geometric parameters of the acoustic black hole (ABH) structure are changed in power exponent, and this feature can be used to control the flexural wave to achieve energy concentration, vibration attenuation, or noise reduction. However, in practice, the ABH structure often has a truncation due to the limitation of manufacturing, which will cause the reflection coefficient to increase significantly and seriously affect the ABH effect. In this paper, a semianalytical model of the sandwich-truncated ABH beam structure with aluminum in the middle layer and steel in the upper and lower layers is constructed based on the energy principle. The ABH effect of the sandwich beam under the clamped-free boundary condition is analyzed. Meanwhile, the effects of damping layer parameters, middle layer material, and thickness on the vibrational acceleration response of the ABH region and the uniform beam region of the sandwich beam are also studied. It is observed that, for the sandwich ABH beam structure, the influence of damping layer thickness on the acceleration response peak values of both the ABH region and the uniform region is very obvious in middle and high frequencies and the peaks at about 9 kHz are completely suppressed when the damping layer thickness reaches 3 mm. It also reveals that the use of aluminum as the middle layer material can bring a vibration attenuation at around 9 kHz both for the ABH region and the uniform beam region compared with using steel as the middle layer material. Experiments are carried out to verify the accuracy of simulation analysis. |
| format | Article |
| id | doaj-art-80c95cd3d8da495d988dc7d8d770869f |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-80c95cd3d8da495d988dc7d8d770869f2025-02-03T05:46:58ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/67081386708138Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary ConditionXiaofei Du0Dacheng Huang1Jianrun Zhang2School of Mechanical Engineering, Southeast University, Nanjing, ChinaSchool of Mechanical Engineering, Southeast University, Nanjing, ChinaSchool of Mechanical Engineering, Southeast University, Nanjing, ChinaThe geometric parameters of the acoustic black hole (ABH) structure are changed in power exponent, and this feature can be used to control the flexural wave to achieve energy concentration, vibration attenuation, or noise reduction. However, in practice, the ABH structure often has a truncation due to the limitation of manufacturing, which will cause the reflection coefficient to increase significantly and seriously affect the ABH effect. In this paper, a semianalytical model of the sandwich-truncated ABH beam structure with aluminum in the middle layer and steel in the upper and lower layers is constructed based on the energy principle. The ABH effect of the sandwich beam under the clamped-free boundary condition is analyzed. Meanwhile, the effects of damping layer parameters, middle layer material, and thickness on the vibrational acceleration response of the ABH region and the uniform beam region of the sandwich beam are also studied. It is observed that, for the sandwich ABH beam structure, the influence of damping layer thickness on the acceleration response peak values of both the ABH region and the uniform region is very obvious in middle and high frequencies and the peaks at about 9 kHz are completely suppressed when the damping layer thickness reaches 3 mm. It also reveals that the use of aluminum as the middle layer material can bring a vibration attenuation at around 9 kHz both for the ABH region and the uniform beam region compared with using steel as the middle layer material. Experiments are carried out to verify the accuracy of simulation analysis.http://dx.doi.org/10.1155/2019/6708138 |
| spellingShingle | Xiaofei Du Dacheng Huang Jianrun Zhang Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition Shock and Vibration |
| title | Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition |
| title_full | Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition |
| title_fullStr | Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition |
| title_full_unstemmed | Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition |
| title_short | Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition |
| title_sort | dynamic property investigation of sandwich acoustic black hole beam with clamped free boundary condition |
| url | http://dx.doi.org/10.1155/2019/6708138 |
| work_keys_str_mv | AT xiaofeidu dynamicpropertyinvestigationofsandwichacousticblackholebeamwithclampedfreeboundarycondition AT dachenghuang dynamicpropertyinvestigationofsandwichacousticblackholebeamwithclampedfreeboundarycondition AT jianrunzhang dynamicpropertyinvestigationofsandwichacousticblackholebeamwithclampedfreeboundarycondition |