Free-Drop Experimental and Simulation Study on the Ultimate Bearing Capacity of Stiffened Plates with Different Stiffnesses under Slamming Loads
Abstract
:1. Introduction
2. Experimental Setup
2.1. Model Design
2.2. Instruments
2.3. Test Conditions and Content
3. Numerical Simulation
3.1. Simulation Model and Parameters
3.2. Monitoring Points and Data Presentation
4. Comparison and Verification
4.1. Convergence Study
4.2. Symmetry Verification
4.3. Independence of the Different Models
5. Results and Discussion
5.1. Distribution Pattern of Structural Strain
5.2. Analysis of Plastic Deformation of Stiffened Plates under Lateral Slamming Loads
6. Conclusions
- (1)
- The time distribution pattern of slamming pressure resembles a pulse load, with the pressure reaching its maximum at the moment of water entry. The spatial distribution of slamming pressure is related to the order of water entry. Points entering the water simultaneously at the same vertical height have similar peaks of slamming pressure, with earlier entry points experiencing higher peak pressures. Points entering later may have multiple peaks due to splashing water.
- (2)
- The time series of microstrain is synchronized with the slamming pressure, and plastic deformation occurs in the structure. The spatial distribution shows that the plastic deformation on the stiffened panel is the highest.
- (3)
- Under slamming loads, the failure mode of the plate and stiffened plate grids involves the formation of plastic hinges along the plate edge diagonals, with concave deformation occurring in the middle of the plate grids. The failure mode of the stiffener involves the formation of plastic hinges at the ends (boundaries) first, followed by stiffener lateral deformation.
- (4)
- Stiffeners can enhance the ability of stiffened plates to resist plastic deformation under slamming loads, with T-section stiffeners providing stronger resistance to plastic deformation. Increasing the plate thickness can improve the ability to resist plastic deformation.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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No. | Length (mm) | Width (mm) | Thickness (mm) | Number of Stiffeners | Height of Web (mm) | Thickness of Web (mm) | Width of Plate (mm) | Thickness of Plate (mm) |
---|---|---|---|---|---|---|---|---|
#1 (Non-stiffened) | 1200 | 800 | 2 | 0 | -- | -- | -- | -- |
#2 (Non-stiffened) | 1200 | 800 | 3 | 0 | -- | -- | -- | -- |
#3 (Angled steel) | 1200 | 800 | 2 | 1 | 100 | 2 | 20 | 3 |
#4 (T-section stiffener) | 1200 | 800 | 2 | 1 | 100 | 2 | 40 | 3 |
Model | Case | Water Entry Angle (deg) | Drop Height (m) | Water Entry Velocity (m/s) |
---|---|---|---|---|
1 | 1 | 15 | 1.00 | 4.43 |
2 | 15 | 1.50 | 5.42 | |
3 | 15 | 2.50 | 7.00 | |
4 (Structure failure) | 15 | 5.10 | 10.00 | |
2 | 5 | 15 | 5.10 | 10.00 |
6 (Structure failure) | 15 | 7.34 | 12.00 |
Point | #1-Model 1 | #2-Model 2 | #3-Model 1 | #4-Model 2 | Simulations | Deviation 1 | Deviation 2 | Deviation 3 | Deviation 4 |
---|---|---|---|---|---|---|---|---|---|
P1 | 726.28 | 732.76 | 734.53 | 733.76 | 669.00 | 8.56% | 9.53% | 9.79% | 9.68% |
P2 | 880.72 | 888.01 | 889.00 | 901.84 | 844.00 | 4.35% | 5.21% | 5.33% | 6.85% |
P3 | 720.69 | 716.19 | 727.97 | 734.07 | 669.00 | 7.73% | 7.05% | 8.82% | 9.73% |
P4 | 659.85 | 673.92 | 700.80 | 685.21 | 635.00 | 3.91% | 6.13% | 10.36% | 7.91% |
P5 | 490.66 | 521.66 | 511.55 | 515.64 | 475.00 | 3.30% | 9.82% | 7.69% | 8.56% |
P6 | 581.92 | 576.74 | 595.45 | 595.25 | 551.00 | 5.61% | 4.67% | 8.07% | 8.03% |
P7 | 487.62 | 516.41 | 529.82 | 537.20 | 539.00 | 9.53% | 4.19% | 1.70% | 0.33% |
P8 | 436.65 | 434.39 | 446.93 | 450.70 | 410.00 | 6.50% | 5.95% | 9.01% | 9.93% |
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Xia, J.; Chen, Z.; Zhao, N.; Zhao, W.; Tang, Q.; Cai, S. Free-Drop Experimental and Simulation Study on the Ultimate Bearing Capacity of Stiffened Plates with Different Stiffnesses under Slamming Loads. J. Mar. Sci. Eng. 2024, 12, 1291. https://doi.org/10.3390/jmse12081291
Xia J, Chen Z, Zhao N, Zhao W, Tang Q, Cai S. Free-Drop Experimental and Simulation Study on the Ultimate Bearing Capacity of Stiffened Plates with Different Stiffnesses under Slamming Loads. Journal of Marine Science and Engineering. 2024; 12(8):1291. https://doi.org/10.3390/jmse12081291
Chicago/Turabian StyleXia, Jinsong, Zhanyang Chen, Nan Zhao, Weidong Zhao, Qin Tang, and Shijian Cai. 2024. "Free-Drop Experimental and Simulation Study on the Ultimate Bearing Capacity of Stiffened Plates with Different Stiffnesses under Slamming Loads" Journal of Marine Science and Engineering 12, no. 8: 1291. https://doi.org/10.3390/jmse12081291