Explicit Dynamic DDA Method considering Dynamic Contact Force
This paper proposes an explicit dynamic DDA method considering dynamic contact force, which aims at solving the problems of low efficiency of dynamic contact detection and the simulation of dynamic contact force in the conventional DDA method. The mutual contact between blocks can be regarded as the...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2016-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2016/7431245 |
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| _version_ | 1832548048189784064 |
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| author | Jian Zhao Ming Xiao Juntao Chen Dongdong Li |
| author_facet | Jian Zhao Ming Xiao Juntao Chen Dongdong Li |
| author_sort | Jian Zhao |
| collection | DOAJ |
| description | This paper proposes an explicit dynamic DDA method considering dynamic contact force, which aims at solving the problems of low efficiency of dynamic contact detection and the simulation of dynamic contact force in the conventional DDA method. The mutual contact between blocks can be regarded as the application of point loading on a single block, and the corresponding contact submatrix can be calculated and the simultaneous equations of the block system can be integrated. The central difference method is adopted to deduce the explicit expression of block displacement containing dynamic contact force. With the relationship between displacement and dynamic contact force, contact constraint equations of a block system are obtained to calculate the dynamic contact force and the corresponding block displacement. The accuracy of the explicit dynamic DDA method is verified using two numerical cases. The calculation results show that the new DDA method can be applied in large-scale geotechnical engineering. |
| format | Article |
| id | doaj-art-47f99c0d751b43cabd01c49899074660 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-47f99c0d751b43cabd01c498990746602025-02-03T06:42:20ZengWileyShock and Vibration1070-96221875-92032016-01-01201610.1155/2016/74312457431245Explicit Dynamic DDA Method considering Dynamic Contact ForceJian Zhao0Ming Xiao1Juntao Chen2Dongdong Li3State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaState Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, ChinaThis paper proposes an explicit dynamic DDA method considering dynamic contact force, which aims at solving the problems of low efficiency of dynamic contact detection and the simulation of dynamic contact force in the conventional DDA method. The mutual contact between blocks can be regarded as the application of point loading on a single block, and the corresponding contact submatrix can be calculated and the simultaneous equations of the block system can be integrated. The central difference method is adopted to deduce the explicit expression of block displacement containing dynamic contact force. With the relationship between displacement and dynamic contact force, contact constraint equations of a block system are obtained to calculate the dynamic contact force and the corresponding block displacement. The accuracy of the explicit dynamic DDA method is verified using two numerical cases. The calculation results show that the new DDA method can be applied in large-scale geotechnical engineering.http://dx.doi.org/10.1155/2016/7431245 |
| spellingShingle | Jian Zhao Ming Xiao Juntao Chen Dongdong Li Explicit Dynamic DDA Method considering Dynamic Contact Force Shock and Vibration |
| title | Explicit Dynamic DDA Method considering Dynamic Contact Force |
| title_full | Explicit Dynamic DDA Method considering Dynamic Contact Force |
| title_fullStr | Explicit Dynamic DDA Method considering Dynamic Contact Force |
| title_full_unstemmed | Explicit Dynamic DDA Method considering Dynamic Contact Force |
| title_short | Explicit Dynamic DDA Method considering Dynamic Contact Force |
| title_sort | explicit dynamic dda method considering dynamic contact force |
| url | http://dx.doi.org/10.1155/2016/7431245 |
| work_keys_str_mv | AT jianzhao explicitdynamicddamethodconsideringdynamiccontactforce AT mingxiao explicitdynamicddamethodconsideringdynamiccontactforce AT juntaochen explicitdynamicddamethodconsideringdynamiccontactforce AT dongdongli explicitdynamicddamethodconsideringdynamiccontactforce |