Fuse Thermal Characteristics Of The Virtual Test Analysis System Development

At present, the demand of intelligence and complex functions of modern fuze make traditional fuze experiment and test method face more and more challenges. Fuze virtual test, which is a new testing technology with numerical solutions, can simplify traditional experiment way and integrated many operating principles in one model to test once to shorten the develop cycle. Therefore, Fuze virtual test has been widely used aboard for fuze development and bring great economic and military value.Due to air friction, fuze surface will generate aerodynamic heat when bomb is launched. At the same time, for active fuze the power will also generate heat when it works. Thermal plays an significant affect on fuze performance. The rapidly rising temperature will cause thermal impact in fuze cavity, which will have negative influence on the reliability of electronic equipment. At the same time, it will also lead to fuze structural deformation due to reduction of stiffness and strength, which results in moving parts not in place or moving earlier. The objective of this paper is to focus on fuze thermal characteristic, which was done through theory analysis, simulation and experiment. The temperature of stationary point and wall were calculated in engineering method, fuze heat transfer and electronic equipment thermal analysis was fulfilled by simulation. And some experiments were also accomplished to verify the simulation results and provide data support for the future fuze thermal analysis system based on virtual test development. All these work will provide theory, method and technical for modern fuze virtual test system.In this paper, thermal environment and main affect factor of fuze, which fuze thermal characteristic analysis were fulfilled through respectively, were expatiated firstly. Secondly, temperature of boundary layer on scattered points of trajectory was simulated on ANSYS Workbench, simulation and theory calculation results were compared to analyze simulation error, fuze heat transfer and thermal stress under aerodynamic heat was also simulated. Thirdly, temperature distribution of fuze on one trajectory point was got through aerodynamic heat simulation experiment, the result was compared with simulation result under experiment condition. Working temperature of thermal batteries were also got by experiment. Fourth, the electronic equipment temperature distribution was simulated under aerodynamic heat and thermal battery working heat. Finally, fuze thermal characteristic analysis based on virtual test was developed through integration of business and self-programmed software.In this paper, fuze thermal characteristic is systematically researched. All these work will lay the foundation of fuze virtual test system.