Study on control rod device mechanism impacting on missile shield plate

Using the fluid-solid interaction arithmetic of ANSYS/LS-DYNA, the dynamic analysis for control rod device mechanism(CRDM) impacting on missile shield plate is performed, and the intensity of plate is evaluated. The shock analysis shows the impact at the rim of the plate is more dangerous than that at the center. When the rim of the plate to be evaluated is under impact, its stress intensity exceeds the yield strength and some part of the material is plastic. When the strain intensity method is adopted, the result shows the computed strain still has quite amount of margin. The plate will not be penetrated and can remain its integrity, preventing control rod missile to impact other components. (authors)