屏蔽板防控制棒驱动机构飞射物冲击研究

Study on Control Rod Device Mechanism Impacting on Missile Shield Plate

采用ANSYS/LS-DYNA的流固耦合算法,对防飞射物屏蔽板在行程套管和驱动杆等组件撞击下的力学性能进行分析,对屏蔽板的受力情况进行校核。冲击分析表明,屏蔽板边缘位置受到撞击比中心位置受到撞击更危险。校核屏蔽板边界位置受到撞击时,其应力强度超出屈服应力,产生了局部塑性。采用应变校核时屏蔽板还有很大的裕量,其不会被击穿,能保持完整性以防止控制棒飞出影响其他部件。

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.