Experimental Investigation of Shock Mitigation of Electronic Boards Within Projectiles
Electronic components inside a projectile are subjected to high acceleration during launch. Failure of these components, affects the performance of the projectile. The objective of the paper is to better understand how shocks are transmitted to electronic boards and to investigate ways to mitigate these shocks. A projectile model is created to mimic an actual projectile. As projectiles are usually composed of threaded components, the effect of the tightening preload torque on accelerations and frequencies of components on boards is discussed. Experimental results show that increasing the tightening preload torque above a specific level can ensure that projectile behaves as a single body, which makes acceleration of a component on the board independent of tightening torque. Effect of mounting the board on polyurethane rubber is also considered. The paper also presents suggestions to simulate experimental test using finite element methods.
Electronic apparatus and appliances; Lumber; Projectiles; Shock (Mechanics)
Electrical and Electronics | Engineering Mechanics | Mechanical Engineering
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Somasundaram, D. S.,
Experimental Investigation of Shock Mitigation of Electronic Boards Within Projectiles.
ASME 2008 International Mechanical Engineering Congress and Exposition