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| Prediction of Structural Dynamic Impact Response Through Developing a Consistent-configuration Explicit Algorithm |
| Received:July 12, 2023 Revised:August 26, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.09.011 |
| KeyWord:explicit algorithm geometry nonlinear impact dynamic penetration non-penetration contact arbitrary reference configuration |
| Author | Institution |
| CHU Dong-yang |
China Ship Scientific Research Center, Jiangsu Wuxi , China;Taihu Laboratory of Deepsea Technological Science, Jiangsu Wuxi , China |
| RONG Yu-fei |
China Ship Scientific Research Center, Jiangsu Wuxi , China;Taihu Laboratory of Deepsea Technological Science, Jiangsu Wuxi , China |
| ZHOU Zhang-tao |
China Ship Scientific Research Center, Jiangsu Wuxi , China;Taihu Laboratory of Deepsea Technological Science, Jiangsu Wuxi , China |
| WANG Jun |
China Ship Scientific Research Center, Jiangsu Wuxi , China;Taihu Laboratory of Deepsea Technological Science, Jiangsu Wuxi , China |
| WANG Hai-kun |
China Ship Scientific Research Center, Jiangsu Wuxi , China;Taihu Laboratory of Deepsea Technological Science, Jiangsu Wuxi , China |
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| Abstract: |
| The work aims to develop an explicit algorithm with consistent configuration to improve the accuracy and robustness of Lagrangian finite element calculation for impact, collision and penetration problems. In order to describe and calculate the large deformation of the structure more accurately, a Lagrangian integral equation of momentum equation with consistent configuration was established based on the theory of arbitrary reference configuration. To avoid the penetration phenomenon between the elements, the forward incremental displacement time integral method and the conjugate gradient algorithm were used to ensure that the non-penetration conditions were still satisfies after the explicit incremental was updated. The reliability of the computational method was verified by simulating the large deformation collision and penetration problems and comparing them with the results of LS-DYNA software. The results also show that the explicit algorithm based on configuration consistency can effectively suppress element distortion in large deformation collision, and improve the robustness and accuracy of calculation. It makes the method have advantages in simulating large deformation collision problems. |
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