Study on Cushioning Performance of Thin-walled Expansion Ring Considering Coefficient of Friction
In order to avoid the structure damage of the aircraft or failure of electronic equipment and springback of moving parts caused by unlocking shock of explosive bolt,it is necessary to absorb the impact energy and inhibit the springback of moving parts.The thin-walled expansion ring structure with good cushioning energy absorption characteristics and controllable deformation is applied to the cushion energy absorption device between interstageseparation.In order to systematically evaluate the influence of coefficient of friction on the cushioning performance of thin-walled expansion ring structure,the finite element method is used to analyze and compare the mechanical properties and cushioning energy absorption effect of thin-walled expansion ring under different coefficient of friction,and it is verified by the cushion test.The results show that under the same impact conditions,with the increase of friction factor,axial braking displacement decreases,axial impact force increases,and the total energy absorption increases.
thin-walled expansion ringcushioning energy absorptioncoefficient of frictionnumerical calculation
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