On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations
This article presents a comparative study on the effectiveness of ventilation to mitigate blasting effects on chambers subjected to confined detonations of high explosives. The pressure time-history that acts on the chamber walls is described by three components: (1) the first shock wave, (2) the tr...
| Main Authors: | , , |
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| Format: | Journal Article |
| Published: |
Multi-Science Publishing
2018
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| Online Access: | http://purl.org/au-research/grants/arc/LP130100919 http://hdl.handle.net/20.500.11937/73183 |
| _version_ | 1848762946366210048 |
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| author | Hernandez, F. Hao, Hong Zhang, Xihong |
| author_facet | Hernandez, F. Hao, Hong Zhang, Xihong |
| author_sort | Hernandez, F. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This article presents a comparative study on the effectiveness of ventilation to mitigate blasting effects on chambers subjected to confined detonations of high explosives. The pressure time-history that acts on the chamber walls is described by three components: (1) the first shock wave, (2) the train of re-reflected shock waves, and (3) the gas pressure. The radial response of spherical chambers is described by the radial breathing mode and modeled by an equivalent single degree of freedom system. The three pressure components are considered for the calculation of the maximum ductility ratio, which is obtained from the numerical solution of the single degree of freedom chamber response. It is assumed that openings reduce the gas pressure but they have an insignificant effect on shock waves. The dynamic response of fully and partially confined chambers are calculated and compared. Results show that intermediate/small openings (less than 10% of the surface of the chamber) are ineffective to mitigate the chamber response and damage. The vibratory response of the chamber is susceptible to elastic or plastic resonance but it is not considerably modified by the long-term gas pressure because of its high radial breathing mode frequency, allowing concluding that ventilation is ineffective to reduce the maximum response of spherical chambers subjected to internal high explosive explosion. |
| first_indexed | 2025-11-14T10:55:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-73183 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:55:39Z |
| publishDate | 2018 |
| publisher | Multi-Science Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-731832023-06-07T07:24:36Z On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations Hernandez, F. Hao, Hong Zhang, Xihong This article presents a comparative study on the effectiveness of ventilation to mitigate blasting effects on chambers subjected to confined detonations of high explosives. The pressure time-history that acts on the chamber walls is described by three components: (1) the first shock wave, (2) the train of re-reflected shock waves, and (3) the gas pressure. The radial response of spherical chambers is described by the radial breathing mode and modeled by an equivalent single degree of freedom system. The three pressure components are considered for the calculation of the maximum ductility ratio, which is obtained from the numerical solution of the single degree of freedom chamber response. It is assumed that openings reduce the gas pressure but they have an insignificant effect on shock waves. The dynamic response of fully and partially confined chambers are calculated and compared. Results show that intermediate/small openings (less than 10% of the surface of the chamber) are ineffective to mitigate the chamber response and damage. The vibratory response of the chamber is susceptible to elastic or plastic resonance but it is not considerably modified by the long-term gas pressure because of its high radial breathing mode frequency, allowing concluding that ventilation is ineffective to reduce the maximum response of spherical chambers subjected to internal high explosive explosion. 2018 Journal Article http://hdl.handle.net/20.500.11937/73183 10.1177/1369433218791610 http://purl.org/au-research/grants/arc/LP130100919 Multi-Science Publishing restricted |
| spellingShingle | Hernandez, F. Hao, Hong Zhang, Xihong On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title | On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title_full | On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title_fullStr | On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title_full_unstemmed | On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title_short | On the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| title_sort | on the effectiveness of ventilation to mitigate the damage of spherical chambers subjected to confined trinitrotoluene detonations |
| url | http://purl.org/au-research/grants/arc/LP130100919 http://hdl.handle.net/20.500.11937/73183 |