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| Numerical Analysis of Erosion Wear in Large-caliber Gun |
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| DOI：10.7643/issn.1672-9242.2022.07.005 |
| KeyWord:large-caliber gun barrel bore temperature erosion wear ABAQUS numerical analysis |
| Author | Institution |
| WANG Rui-zhi |
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang , China |
| TANG En-ling |
Key Laboratory of Transient Physical Mechanics and Energy Conversion Materials of Liaoning Province, Shenyang Ligong University, Shenyang , China |
| LI Shu-li |
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing , China |
| WANG Li-qun |
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing , China |
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| Abstract: |
| This paper aims to quantitatively study the ablation wear law of the inner bore of the barrel and guide the life prediction and structural design of the barrel. The fully implicit difference scheme is used to discretize the one-dimensional heat transfer control differential equation, and the temperature distributions at different radial positions and different times of the barrel section are solved. On the basis of solving the temperature in the barrel by the difference method, the ablation model in the barrel is deduced by using one-dimensional semi-infinite ablation model and Fourier heat conduction theorem. Finally, based on ALE adaptive grid, the degradation law of barrel inner bore, especially rifling, under different projectile numbers is dynamically simulated. The results show that the circumferential ablation wear of the barrel is much less than the radial ablation wear, but the positions of the maximum wear are basically the same, both at the slope bore and the beginning of the rifling. Among them, the wear at the slope bore is the most serious, and the slope angle at some positions is seriously damaged. In addition, the wear at the beginning of the rifling shows an inward shrinkage trend as a whole, especially on the guide side of the rifling. The barrel ablation wear is mainly concentrated in the range of 50~200 mm at the beginning of the slope bore, showing a trend of rapid increase first and then rapid decline. At the 500th launch, the peak value of ablation wear on the guide side of the barrel is 1.6 mm, the peak value of wear on the non-guide side is 1.4 mm, and the radial and circumferential components of ablation wear on the guide side are generally 0.1~0.2 mm higher than the axial component. |
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