Abstract: To analyze the cause of the excessive early-destruction rate of a certain fuze in target practice, and slove the use problem of the fuze, an experimental method in the laboratory is advanced. The interactional effect experiments of two fuzes are done in different conditions. Interactional effect rules of fuzes are analyzed, and the failure mechanism is explained. The research results show that relative pose, relative height, relative velocity, radiation energy and radiation frequency can affect the threshold interactional distance. And the early-destruction reason is that the radiation parameters are changing when the fuzes move to each other, and the frequency pulling happens when the radiation parameters meet the requirements. The detection voltage fluctuates to lead to the mis-action of the fuze. Owing to the design technology, early-destruction can not be avoided in fusillade. But the self-destruction rate can be reduced effectively when the artilleries are positioned in a reasonable distance.

Key words: ordnance science and technology, fuze, fusillade, electromagnetic compatibility, failure mechanism, self-destruction rate