Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment
The driving performance of subsea mining vehicles is greatly affected by the pressure–sinkage characteristics of deep-sea sediment. Therefore, it is of great importance to analyze the microscopic properties of deep-sea sediment and establish the corresponding pressure–sinkage model for the safe oper...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/7/883 |
| _version_ | 1797405996791889920 |
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| author | Dingbang Wei Huade Cao Jianxin Xia |
| author_facet | Dingbang Wei Huade Cao Jianxin Xia |
| author_sort | Dingbang Wei |
| collection | DOAJ |
| description | The driving performance of subsea mining vehicles is greatly affected by the pressure–sinkage characteristics of deep-sea sediment. Therefore, it is of great importance to analyze the microscopic properties of deep-sea sediment and establish the corresponding pressure–sinkage model for the safe operation of subsea mining vehicles. Hence, the present paper focuses on the physical properties of deep-sea sediment to provide a preliminary understanding of its pressure–sinkage process and evolution according to the solid–liquid two-phase flow characteristics and particle flow mechanism. In addition, the stress loading time and the rheological theory are applied in order to introduce a four-element model that describes the various pressure–sinkage stages that correspond to each stage of deep-sea sediment evolution. On this basis, the parameters of the pressure–sinkage constitutive model are determined by a specific calculation method. Moreover, a new pressure–sinkage constitutive model of deep-sea sediment that considers the time-variable mechanical properties is established in order to describe the full sinkage process. Finally, research results from the existing literature and experimental data are used to verify the rationality and correctness of the model. The results show that the proposed pressure–sinkage constitutive model is in good agreement with experimental data and is effective in describing the evolution of the mechanical properties and the trend in the sinkage rate of deep-sea sediment at various stages. A comparison with the Kelvin model indicates that the proposed pressure–sinkage constitutive model provides superior accuracy with the use of fewer parameters. Consequently, this study can provide a theoretical basis and technical support for the design of subsea mining vehicles. |
| first_indexed | 2024-03-09T03:18:22Z |
| format | Article |
| id | doaj.art-dd328358d5134ef9b01b0314daad749a |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T03:18:22Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-dd328358d5134ef9b01b0314daad749a2023-12-03T15:14:43ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-06-0110788310.3390/jmse10070883Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea SedimentDingbang Wei0Huade Cao1Jianxin Xia2School of Ocean Science, China University of Geoscience, Beijing 100083, ChinaSchool of Ocean Science, China University of Geoscience, Beijing 100083, ChinaSchool of Ocean Science, China University of Geoscience, Beijing 100083, ChinaThe driving performance of subsea mining vehicles is greatly affected by the pressure–sinkage characteristics of deep-sea sediment. Therefore, it is of great importance to analyze the microscopic properties of deep-sea sediment and establish the corresponding pressure–sinkage model for the safe operation of subsea mining vehicles. Hence, the present paper focuses on the physical properties of deep-sea sediment to provide a preliminary understanding of its pressure–sinkage process and evolution according to the solid–liquid two-phase flow characteristics and particle flow mechanism. In addition, the stress loading time and the rheological theory are applied in order to introduce a four-element model that describes the various pressure–sinkage stages that correspond to each stage of deep-sea sediment evolution. On this basis, the parameters of the pressure–sinkage constitutive model are determined by a specific calculation method. Moreover, a new pressure–sinkage constitutive model of deep-sea sediment that considers the time-variable mechanical properties is established in order to describe the full sinkage process. Finally, research results from the existing literature and experimental data are used to verify the rationality and correctness of the model. The results show that the proposed pressure–sinkage constitutive model is in good agreement with experimental data and is effective in describing the evolution of the mechanical properties and the trend in the sinkage rate of deep-sea sediment at various stages. A comparison with the Kelvin model indicates that the proposed pressure–sinkage constitutive model provides superior accuracy with the use of fewer parameters. Consequently, this study can provide a theoretical basis and technical support for the design of subsea mining vehicles.https://www.mdpi.com/2077-1312/10/7/883deep-sea sedimentmicromechanismsegmentation treatmentpressure–sinkage constitutive modeltime–stress superposition principle |
| spellingShingle | Dingbang Wei Huade Cao Jianxin Xia Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment Journal of Marine Science and Engineering deep-sea sediment micromechanism segmentation treatment pressure–sinkage constitutive model time–stress superposition principle |
| title | Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment |
| title_full | Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment |
| title_fullStr | Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment |
| title_full_unstemmed | Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment |
| title_short | Study on the Pressure–Sinkage Process and Constitutive Model of Deep-Sea Sediment |
| title_sort | study on the pressure sinkage process and constitutive model of deep sea sediment |
| topic | deep-sea sediment micromechanism segmentation treatment pressure–sinkage constitutive model time–stress superposition principle |
| url | https://www.mdpi.com/2077-1312/10/7/883 |
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