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Analysis of the the fuze thermal characteristics and its virtual test system development

Author: FangZhiSen
Tutor: WangZuo；LuJing
School: Nanjing University of Technology and Engineering
Course: Mechanical and Electronic Engineering
Keywords: Fuse Thermal Characteristics Virtual Test PCB board thermal analysis
CLC: TJ430
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 1
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Abstract


With the development of information technology, the fuze degree of intelligence is getting higher and higher, and the need to achieve more and more, the development of the Internet age Fuze has become increasingly complex, the traditional fuze tests and test methods are faced with many challenges. Fuze virtual test technology can simplify the the traditional experimental process, integration testing of multiple laws governing the operation model, greatly reducing the fuze development cycle, has tremendous economic value and military significance. Fever, projectile fuze flying through the air, the surface will generate the pneumatic hot, active fuze power will have an important impact thermal fuse performance, the temperature rise in the fuze cavity to form a high-temperature thermal shock environment of the fuze cavity impact within electronic equipment reliability, while the temperature rise may cause the fuze and deformation due to the structural strength and stiffness to reduce the fuze parts movement is not in place, the misfire occurs, or a part of the early movement, occurred early burst. For fuze thermal characteristics of research, from the theoretical analysis, numerical simulation and experimental starting fuze stagnation and theoretical calculation of the wall temperature and heat transfer simulation analysis of pneumatic fuze body under thermal conditions and fuze cavity electronic equipment thermal analysis and experimental testing of the fuze body aerodynamic heating, and finally the use of mature commercial software to fuse thermal characteristics of the virtual test system development, modern fuzes virtual test the theory, methods and techniques. The paper first describes the thermal environment of the fuze environmental heat factors influence fuze, and then study various factors. Completed the fuze ballistic boundary layer temperature simulation using ANSYS Workbench platform, obtain the boundary layer temperature distribution of discrete points in the trajectory, and simulation results with the theoretical calculation results were compared with the analytical error, and then fuze body aerodynamic heating conditions heat transfer characteristics of the heat - stress coupling analysis; Aerothermal simulation test of a ballistic location of the fuze body temperature distribution, compared with the experimental results of the simulation and test conditions, design test completed fuze commonly used thermal battery temperature test to provide data support for virtual test system; in the the fuze cavity temperature obtained under ambient conditions, the analysis of the effects of active fuze thermal battery heat the fuze cavity of electronic equipment. Finally, the results of the analysis before integration, on the basis of the existing commercial software and self-programming software development fuze thermal characteristics analysis of virtual test system. Through the work, the paper is not only the thermal characteristics of the fuze system integration will also analyze the experience and results gained experience for future analysis work also laid the foundation for the fuze virtual test system development.

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CLC: > Industrial Technology > Arms industry > Ammunition, fuses, pyrotechnics > Fuse > General issues
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