Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed
Aiming at the problem of high-speed entry of vehicles with a diameter of 200 mm, a numerical model of high-speed entry of vehicles is established based on the arbitrary Lagrange–Euler (ALE) algorithm, and the numerical simulation of high-speed entry of flat-nosed and round-nosed vehicles is carried...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/12/1905 |
| _version_ | 1797456969103048704 |
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| author | Hairui Zhao Yao Shi Guang Pan Qiaogao Huang |
| author_facet | Hairui Zhao Yao Shi Guang Pan Qiaogao Huang |
| author_sort | Hairui Zhao |
| collection | DOAJ |
| description | Aiming at the problem of high-speed entry of vehicles with a diameter of 200 mm, a numerical model of high-speed entry of vehicles is established based on the arbitrary Lagrange–Euler (ALE) algorithm, and the numerical simulation of high-speed entry of flat-nosed and round-nosed vehicles is carried out. On this basis, the experimental research on the entry of vehicle with buffer caps is carried out. The following conclusions are obtained through simulation. The peak value of the axial load of the vehicle raises with the increase of the inlet velocity and angle, while the stable value only raises with the increase of the inlet velocity. The impact load on the round-nosed vehicle is obviously smaller than that on the flat-nosed vehicle when the water entry angle is greater than 80°. The peak value of axial load can be reduced by 22% when entering water vertically at 100 m/s. The following conclusions are obtained through experiments. The buffer head cap has a significant load reduction effect. It shows compaction, cracks and breakage under the impact of water. These processes can absorb part of the impact energy, reduce the peak value of axial load and increase the pulse width. The load reduction rate grows from 4.7% to 18.5% when the length of the buffer head cap is increased from 200 mm to 300 mm while the water inlet speed is the same. The damage level of the head cap increases sharply, and the load reduction rate raises when the water entry speed is increased while the length of the buffer head cap is the same. |
| first_indexed | 2024-03-09T16:14:26Z |
| format | Article |
| id | doaj.art-f6dc103b23bf4ffda24008b5d461045c |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T16:14:26Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-f6dc103b23bf4ffda24008b5d461045c2023-11-24T15:56:20ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-12-011012190510.3390/jmse10121905Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High SpeedHairui Zhao0Yao Shi1Guang Pan2Qiaogao Huang3School of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaSchool of Marine Science and Technology, Northwestern Polytechnical University, Xi’an 710072, ChinaAiming at the problem of high-speed entry of vehicles with a diameter of 200 mm, a numerical model of high-speed entry of vehicles is established based on the arbitrary Lagrange–Euler (ALE) algorithm, and the numerical simulation of high-speed entry of flat-nosed and round-nosed vehicles is carried out. On this basis, the experimental research on the entry of vehicle with buffer caps is carried out. The following conclusions are obtained through simulation. The peak value of the axial load of the vehicle raises with the increase of the inlet velocity and angle, while the stable value only raises with the increase of the inlet velocity. The impact load on the round-nosed vehicle is obviously smaller than that on the flat-nosed vehicle when the water entry angle is greater than 80°. The peak value of axial load can be reduced by 22% when entering water vertically at 100 m/s. The following conclusions are obtained through experiments. The buffer head cap has a significant load reduction effect. It shows compaction, cracks and breakage under the impact of water. These processes can absorb part of the impact energy, reduce the peak value of axial load and increase the pulse width. The load reduction rate grows from 4.7% to 18.5% when the length of the buffer head cap is increased from 200 mm to 300 mm while the water inlet speed is the same. The damage level of the head cap increases sharply, and the load reduction rate raises when the water entry speed is increased while the length of the buffer head cap is the same.https://www.mdpi.com/2077-1312/10/12/1905high-speed water entrynumerical calculationexperimentbuffer head cap |
| spellingShingle | Hairui Zhao Yao Shi Guang Pan Qiaogao Huang Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed Journal of Marine Science and Engineering high-speed water entry numerical calculation experiment buffer head cap |
| title | Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed |
| title_full | Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed |
| title_fullStr | Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed |
| title_full_unstemmed | Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed |
| title_short | Study on Impact Load and Head Cap Load Reduction Performance of Vehicle Entering Water at High Speed |
| title_sort | study on impact load and head cap load reduction performance of vehicle entering water at high speed |
| topic | high-speed water entry numerical calculation experiment buffer head cap |
| url | https://www.mdpi.com/2077-1312/10/12/1905 |
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