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| Assessment of Solid Fuel Missile Safety in Horizontal Drop Test Involving Bolt Failure |
| Received:August 01, 2023 Revised:September 21, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.10.011 |
| KeyWord:finite element analysis horizontal drop bolt joint bolt failure energetic materials ammunition safety |
| Author | Institution |
| WU Zhen-yu |
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing , China |
| ZHANG Tao |
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing , China;State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Dalian University of Technology, Liaoning Dalian , China |
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| Abstract: |
| The solid fuel missile safety in horizental drop test was assessed through numerical simulation. The 6m drop test of solid fuel missile with main axis at horizontal orientaion was simulated using LS-DYNA. The numerical model was verified with displacement and acceleration test data. Stress field was calculated based on the verified model to indicate whether energetic metarials would be ignited. Results from different bolt joint model and different quantities of bolt with failure were compared. It demonstrates that the bolt connection method has the highest accuracy when calculating the peak acceleration among all the modeling methods; the 3-segment condition generates the the most accurate quantity of bolt with failure and peak acceleration numerical solution. According to the most accurate numerical model, the maximum Von Mises stress inside the warhead and engine are both less than the reaction threshold. In conclusion, it is found that the modeling method and quantity of bolt with failure have a significant effect on the calculation accuracy of displacement and acceleration. The most reliable simulation results are obtained by the 3-segment condition and using the bolt connection method for modeling. The stress field result based on the most accurate numerical model indicates that a 6-meter horizontal drop of the entire missile will not directly cause the ignition reaction in the warhead and engine. |
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